From 0f29e93036e8d82eac5a00f10704579aeb9038a1 Mon Sep 17 00:00:00 2001
From: NEERAJ <neerajrpathak710@gmail.com>
Date: Sat, 27 Dec 2025 14:48:45 +0530
Subject: [PATCH 1/4] feat: add `object/common-keys-in`

Ref: https://github.com/stdlib-js/stdlib/issues/8755
---
 .../@stdlib/object/common-keys-in/README.md   | 125 +++++++++++
 .../common-keys-in/benchmark/benchmark.js     |  71 ++++++
 .../benchmark/benchmark.num_arguments.js      | 107 +++++++++
 .../benchmark/benchmark.num_properties.js     | 104 +++++++++
 .../object/common-keys-in/docs/repl.txt       |  29 +++
 .../common-keys-in/docs/types/index.d.ts      |  70 ++++++
 .../object/common-keys-in/docs/types/test.ts  |  33 +++
 .../object/common-keys-in/examples/index.js   |  41 ++++
 .../object/common-keys-in/lib/index.js        |  51 +++++
 .../@stdlib/object/common-keys-in/lib/main.js | 106 +++++++++
 .../object/common-keys-in/package.json        |  72 +++++++
 .../object/common-keys-in/test/test.js        | 204 ++++++++++++++++++
 12 files changed, 1013 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/README.md
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_arguments.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_properties.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/docs/repl.txt
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/docs/types/index.d.ts
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/docs/types/test.ts
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/examples/index.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/package.json
 create mode 100644 lib/node_modules/@stdlib/object/common-keys-in/test/test.js

diff --git a/lib/node_modules/@stdlib/object/common-keys-in/README.md b/lib/node_modules/@stdlib/object/common-keys-in/README.md
new file mode 100644
index 000000000000..3db11e18a5a3
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/README.md
@@ -0,0 +1,125 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2021 The Stdlib Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+-->
+
+# commonKeysIn
+
+> Return the common own and inherited property names of two or more objects.
+
+<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<!-- Package usage documentation. -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var commonKeysIn = require( '@stdlib/object/common-keys-in' );
+```
+
+#### commonKeysIn( obj1, obj2\[, obj3\[,...,objN]] )
+
+Returns the common own and inherited property names of two or more objects.
+
+```javascript
+var obj = {
+    'a': 1,
+    'b': 2,
+    'c': 3
+};
+
+var obj2 = {
+    'a': 1,
+    'b': 2
+};
+
+var keys = commonKeysIn( obj, obj2 );
+// returns [ 'a', 'b' ]
+```
+
+</section>
+
+<!-- /.usage -->
+
+<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="notes">
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var commonKeysIn = require( '@stdlib/object/common-keys-in' );
+
+function Foo() {
+    this.beep = 'boop';
+    this.a = {
+        'b': 'c'
+    };
+    return this;
+}
+
+Foo.prototype.foo = [ 'bar' ];
+
+var obj1 = new Foo();
+
+var obj2 = {
+    'beep': 'boop',
+    'foo': 'bar'
+};
+
+var keys = commonKeysIn( obj1, obj2 );
+// returns [ 'beep', 'foo' ]
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="references">
+
+</section>
+
+<!-- /.references -->
+
+<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
+
+<section class="links">
+
+</section>
+
+<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.js b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.js
new file mode 100644
index 000000000000..7a4795874ea0
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.js
@@ -0,0 +1,71 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
+var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
+var fromCodePoint = require( '@stdlib/string/from-code-point' );
+var pkg = require( './../package.json' ).name;
+var commonKeysIn = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg, function benchmark( b ) {
+	var obj1;
+	var obj2;
+	var out;
+	var i;
+
+	obj1 = {
+		'b': 3.141592653589793,
+		'c': {
+			'c1': 'bap',
+			'c3': {
+				'c3b': 5,
+				'c3c': 'bop'
+			},
+			'c4': 1337
+		},
+		'd': [ 4, 5, 6 ],
+		'e': true
+	};
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		obj2 = {
+			'a': 'beep',
+			'b': 'baz',
+			'c': 'boop'
+		};
+		obj2[ fromCodePoint( i%126 ) ] = 'bar';
+		out = commonKeysIn( obj1, obj2 );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isStringArray( out ) && !isEmptyArray( out ) ) {
+		b.fail( 'should return an array of strings' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_arguments.js b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_arguments.js
new file mode 100644
index 000000000000..c7aea10dc45e
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_arguments.js
@@ -0,0 +1,107 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
+var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
+var pkg = require( './../package.json' ).name;
+var commonKeysIn = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} N - number of arguments
+* @returns {Function} benchmark function
+*/
+function createBenchmark( N ) {
+	var args;
+	var o;
+	var i;
+	var j;
+
+	args = [];
+	for ( i = 0; i < N; i++ ) {
+		o = {};
+		for ( j = 0; j < 10; j++ ) {
+			o[ j ] = i * j;
+		}
+		args.push( o );
+	}
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var keys;
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			keys = commonKeysIn.apply( null, args );
+			if ( typeof keys !== 'object' ) {
+				b.fail( 'should return an object' );
+			}
+		}
+		b.toc();
+		if ( !isStringArray( keys ) && !isEmptyArray( keys ) ) {
+			b.fail( 'should return an array of strings' );
+		}
+		b.pass( 'benchmark finished' );
+		b.end();
+	}
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+	var len;
+	var min;
+	var max;
+	var f;
+	var i;
+
+	min = 1; // 2^min
+	max = 6; // 2^max
+
+	for ( i = min; i <= max; i++ ) {
+		len = pow( 2, i );
+		f = createBenchmark( len );
+		bench( pkg+':num_args='+len+',num_properties=10', f );
+	}
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_properties.js b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_properties.js
new file mode 100644
index 000000000000..e977bafe7f12
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/benchmark/benchmark.num_properties.js
@@ -0,0 +1,104 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var bench = require( '@stdlib/bench' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
+var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
+var pkg = require( './../package.json' ).name;
+var commonKeysIn = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} N - number of properties
+* @returns {Function} benchmark function
+*/
+function createBenchmark( N ) {
+	var x;
+	var y;
+	var i;
+
+	x = {};
+	y = {};
+	for ( i = 0; i < N; i++ ) {
+		x[ i ] = i;
+		y[ i ] = i + 1;
+	}
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var keys;
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			keys = commonKeysIn( x, y );
+			if ( typeof keys !== 'object' ) {
+				b.fail( 'should return an object' );
+			}
+		}
+		b.toc();
+		if ( !isStringArray( keys ) && !isEmptyArray( keys ) ) {
+			b.fail( 'should return an array of strings' );
+		}
+		b.pass( 'benchmark finished' );
+		b.end();
+	}
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+	var len;
+	var min;
+	var max;
+	var f;
+	var i;
+
+	min = 1; // 10^min
+	max = 6; // 10^max
+
+	for ( i = min; i <= max; i++ ) {
+		len = pow( 10, i );
+		f = createBenchmark( len );
+		bench( pkg+':num_properties='+len, f );
+	}
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/docs/repl.txt b/lib/node_modules/@stdlib/object/common-keys-in/docs/repl.txt
new file mode 100644
index 000000000000..792412fa2821
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/docs/repl.txt
@@ -0,0 +1,29 @@
+
+{{alias}}( obj1, obj2[, ...obj] )
+    Returns the common own and inherited property names of two or more objects.
+
+    Parameters
+    ----------
+    obj1: any
+        First object.
+
+    obj2: any
+        Second object.
+
+    obj: ...any (optional)
+        Additional objects.
+
+    Returns
+    -------
+    out: Array<string>
+        Common keys.
+
+    Examples
+    --------
+    > var obj1 = { 'a': 1, 'b': 2 };
+    > var obj2 = { 'a': 1, 'b': 2, 'c': 3, 'd': 4 };
+    > var keys = {{alias}}( obj1, obj2 )
+    [ 'a', 'b' ]
+
+    See Also
+    --------
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/docs/types/index.d.ts b/lib/node_modules/@stdlib/object/common-keys-in/docs/types/index.d.ts
new file mode 100644
index 000000000000..9238351b757c
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/docs/types/index.d.ts
@@ -0,0 +1,70 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+// TypeScript Version: 4.1
+
+/// <reference types="@stdlib/types"/>
+
+/**
+* Returns the common own and inherited property names of two or more objects.
+*
+* @param obj1 - first object
+* @param obj2 - second object
+* @param obj - additional objects
+* @returns common keys
+*
+* @example
+* var obj = {
+*     'a': 1,
+*     'b': 2,
+*     'c': 3
+* };
+*
+* var obj2 = {
+*     'a': 1,
+*     'b': 2
+* };
+*
+* var keys = commonKeysIn( obj, obj2 );
+* // returns [ 'a', 'b' ]
+*
+* @example
+* var obj1 = {
+*     'a': 1,
+*     'b': 2,
+*     'c': 3
+* };
+*
+* var obj2 = {
+*     'a': 1,
+*     'b': 2
+* };
+*
+* var obj3 = {
+*     'a': 1,
+* };
+*
+* var keys = commonKeysIn( obj1, obj2, obj3 );
+* // returns [ 'a' ]
+*/
+declare function commonKeysIn( obj1: any, obj2: any, ...obj: Array<any> ): Array<string>;
+
+
+// EXPORTS //
+
+export = commonKeysIn;
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/docs/types/test.ts b/lib/node_modules/@stdlib/object/common-keys-in/docs/types/test.ts
new file mode 100644
index 000000000000..63cb933fc170
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/docs/types/test.ts
@@ -0,0 +1,33 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import commonKeysIn = require( './index' );
+
+
+// TESTS //
+
+// The function returns an array of strings...
+{
+	commonKeysIn( { 'a': 0, 'b': 1 }, { 'a': 0 } ); // $ExpectType string[]
+}
+
+// The compiler throws an error if the function is provided insufficient arguments...
+{
+	commonKeysIn(); // $ExpectError
+	commonKeysIn( {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/examples/index.js b/lib/node_modules/@stdlib/object/common-keys-in/examples/index.js
new file mode 100644
index 000000000000..e9124fd7d531
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/examples/index.js
@@ -0,0 +1,41 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+var commonKeysIn = require( './../lib' );
+
+function Foo() {
+	this.beep = 'boop';
+	this.a = {
+		'b': 'c'
+	};
+	return this;
+}
+
+Foo.prototype.foo = [ 'bar' ];
+
+var obj1 = new Foo();
+
+var obj2 = {
+	'beep': 'boop',
+	'foo': 'bar'
+};
+
+console.log( commonKeysIn( obj1, obj2 ) );
+// => [ 'beep', 'foo' ]
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/lib/index.js b/lib/node_modules/@stdlib/object/common-keys-in/lib/index.js
new file mode 100644
index 000000000000..dc4ef63421c4
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/lib/index.js
@@ -0,0 +1,51 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+/**
+* Return the common own and inherited property names of two or more objects.
+*
+* @module @stdlib/object/common-keys-in
+*
+* @example
+* var commonKeysIn = require( '@stdlib/object/common-keys-in' );
+*
+* var obj = {
+*     'a': 1,
+*     'b': 2,
+*     'c': 3
+* };
+*
+* var obj2 = {
+*     'a': 1,
+*     'b': 2
+* };
+*
+* var keys = commonKeysIn( obj, obj2 );
+* // returns [ 'a', 'b' ]
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/lib/main.js b/lib/node_modules/@stdlib/object/common-keys-in/lib/main.js
new file mode 100644
index 000000000000..beb3ab6f7b10
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/lib/main.js
@@ -0,0 +1,106 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var keysIn = require( '@stdlib/utils/keys-in' );
+var hasProp = require( '@stdlib/assert/has-property' );
+
+
+// MAIN //
+
+/**
+* Returns the common own and inherited property names of two or more objects.
+*
+* @param {*} obj1 - first object
+* @param {*} obj2 - second object
+* @param {...*} [obj] - additional objects
+* @throws {Error} must provide at least two objects
+* @returns {(StringArray|EmptyArray)} common keys
+*
+* @example
+* var obj = {
+*     'a': 1,
+*     'b': 2,
+*     'c': 3
+* };
+*
+* var obj2 = {
+*     'a': 1,
+*     'b': 2
+* };
+*
+* var keys = commonKeysIn( obj, obj2 );
+* // returns [ 'a', 'b' ]
+*
+* @example
+* var obj1 = {
+*     'a': 1,
+*     'b': 2,
+*     'c': 3
+* };
+*
+* var obj2 = {
+*     'a': 1,
+*     'b': 2
+* };
+*
+* var obj3 = {
+*     'a': 1,
+* };
+*
+* var keys = commonKeysIn( obj1, obj2, obj3 );
+* // returns [ 'a' ]
+*/
+function commonKeysIn() {
+	var nargs;
+	var keys;
+	var arg;
+	var ptr;
+	var N;
+	var i;
+	var j;
+
+	nargs = arguments.length;
+	if ( nargs < 2 ) {
+		throw new Error( 'insufficient arguments. Must provide at least two objects.' );
+	}
+	keys = keysIn( arguments[ 0 ] );
+	N = keys.length;
+
+	for ( i = 1; i < nargs; i++ ) {
+		arg = arguments[ i ];
+		ptr = 0;
+		for ( j = 0; j < N; j++ ) {
+			if ( hasProp( arg, keys[ j ] ) ) {
+				keys[ ptr ] = keys[ j ];
+				ptr += 1;
+			}
+		}
+		N = ptr;
+	}
+	keys.length = N;
+	return keys;
+}
+
+
+// EXPORTS //
+
+module.exports = commonKeysIn;
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/package.json b/lib/node_modules/@stdlib/object/common-keys-in/package.json
new file mode 100644
index 000000000000..0794835676c2
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/package.json
@@ -0,0 +1,72 @@
+{
+  "name": "@stdlib/object/common-keys-in",
+  "version": "0.0.0",
+  "description": "Return the common own and inherited property names of two or more objects.",
+  "license": "Apache-2.0",
+  "author": {
+    "name": "The Stdlib Authors",
+    "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+  },
+  "contributors": [
+    {
+      "name": "The Stdlib Authors",
+      "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
+    }
+  ],
+  "main": "./lib",
+  "directories": {
+    "benchmark": "./benchmark",
+    "doc": "./docs",
+    "example": "./examples",
+    "lib": "./lib",
+    "test": "./test"
+  },
+  "types": "./docs/types",
+  "scripts": {},
+  "homepage": "https://github.com/stdlib-js/stdlib",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/stdlib-js/stdlib.git"
+  },
+  "bugs": {
+    "url": "https://github.com/stdlib-js/stdlib/issues"
+  },
+  "dependencies": {},
+  "devDependencies": {},
+  "engines": {
+    "node": ">=0.10.0",
+    "npm": ">2.7.0"
+  },
+  "os": [
+    "aix",
+    "darwin",
+    "freebsd",
+    "linux",
+    "macos",
+    "openbsd",
+    "sunos",
+    "win32",
+    "windows"
+  ],
+  "keywords": [
+    "stdlib",
+    "stdutils",
+    "stdutil",
+    "utilities",
+    "utility",
+    "utils",
+    "util",
+    "object",
+    "obj",
+    "names",
+    "keys",
+    "enumerable",
+    "own",
+    "common",
+    "shared",
+    "properties",
+    "props",
+    "inherited",
+    "prototype"
+  ]
+}
diff --git a/lib/node_modules/@stdlib/object/common-keys-in/test/test.js b/lib/node_modules/@stdlib/object/common-keys-in/test/test.js
new file mode 100644
index 000000000000..28ecc1d6e82e
--- /dev/null
+++ b/lib/node_modules/@stdlib/object/common-keys-in/test/test.js
@@ -0,0 +1,204 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2021 The Stdlib Authors.
+*
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*    http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+'use strict';
+
+// MODULES //
+
+var tape = require( 'tape' );
+var commonKeysIn = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof commonKeysIn, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function throws an error if provided insufficient arguments', function test( t ) {
+	t.throws( foo, Error, 'throws error' );
+	t.throws( bar, Error, 'throws error' );
+	t.end();
+	function foo() {
+		commonKeysIn();
+	}
+	function bar() {
+		commonKeysIn( {} );
+	}
+});
+
+tape( 'the function returns an array of common property names (two objects)', function test( t ) {
+	var expected;
+	var actual;
+	var obj1;
+	var obj2;
+	var obj3;
+
+	obj1 = {
+		'a': 1,
+		'b': 2,
+		'c': 3,
+		'd': 4
+	};
+	obj2 = {
+		'a': 1,
+		'b': 2,
+		'c': 3
+	};
+	obj3 = {
+		'c': 3,
+		'd': 4
+	};
+
+	actual = commonKeysIn( obj1, obj2 );
+	expected = [ 'a', 'b', 'c' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj1, obj3 );
+	expected = [ 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj2, obj3 );
+	expected = [ 'c' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	t.end();
+});
+
+tape( 'the function returns an array of common property names (multiple objects)', function test( t ) {
+	var expected;
+	var actual;
+	var obj1;
+	var obj2;
+	var obj3;
+	var obj4;
+
+	obj1 = {
+		'a': 1,
+		'b': 2,
+		'c': 3,
+		'd': 4,
+		'e': 5,
+		'f': 6
+	};
+	obj2 = {
+		'a': 1,
+		'b': 2,
+		'c': 3,
+		'd': 4,
+		'f': 6
+	};
+	obj3 = {
+		'a': 1,
+		'c': 3,
+		'd': 4
+	};
+	obj4 = {
+		'a': 1,
+		'b': 2
+	};
+
+	actual = commonKeysIn( obj1, obj2, obj3, obj4 );
+	expected = [ 'a' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj2, obj3, obj4 );
+	expected = [ 'a' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj3, obj2, obj1 );
+	expected = [ 'a', 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj4, obj2, obj1 );
+	expected = [ 'a', 'b' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj2, obj1, obj3 );
+	expected = [ 'a', 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	t.end();
+});
+
+tape( 'the function returns an array of common property names (arrays, strings)', function test( t ) {
+	var expected;
+	var actual;
+	var x;
+	var y;
+
+	x = [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ];
+	y = [ 5, 6, 7, 8, 9 ];
+	expected = [ '0', '1', '2', '3', '4' ];
+	actual = commonKeysIn( x, y );
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	x = {
+		'0': 0,
+		'2': 2
+	};
+	y = [ 0, 1, 2 ];
+	expected = [ '0', '2' ];
+	actual = commonKeysIn( x, y );
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	x = 'abcd';
+	y = 'abcdef';
+	expected = [ '0', '1', '2', '3' ];
+	actual = commonKeysIn( x, y );
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	t.end();
+});
+
+tape( 'the function returns an array of common property names (inherited properties)', function test( t ) {
+	var expected;
+	var actual;
+	var obj1;
+	var obj2;
+	var obj3;
+
+	obj1 = {
+		'a': 1,
+		'b': 2,
+		'c': 3,
+		'd': 4
+	};
+	obj2 = Object.create( obj1 );
+	obj2.e = 5;
+	obj2.f = 6;
+	obj3 = Object.create( obj2 );
+	obj3.g = 7;
+	obj3.h = 8;
+
+	actual = commonKeysIn( obj1, obj2, obj3 );
+	expected = [ 'a', 'b', 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj2, obj3 );
+	expected = [ 'e', 'f', 'a', 'b', 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	actual = commonKeysIn( obj3, obj3 );
+	expected = [ 'g', 'h', 'e', 'f', 'a', 'b', 'c', 'd' ];
+	t.deepEqual( actual, expected, 'returns expected keys' );
+
+	t.end();
+});

From b7b06cfa2746a86c1f428af76a5501c4d88ce289 Mon Sep 17 00:00:00 2001
From: NEERAJ <neerajrpathak710@gmail.com>
Date: Sat, 27 Dec 2025 14:50:03 +0530
Subject: [PATCH 2/4] remove: remove `commonKeysIn` from namespace

This commit removes the `commonKeysIn` symbol from the `@stdlib/utils`
namespace due to a package migration.

BREAKING CHANGE: remove `commonKeysIn`

To migrate, users should access the same symbol via the
`@stdlib/object` namespace.

Ref: https://github.com/stdlib-js/stdlib/issues/8755
---
 .../@stdlib/utils/docs/types/index.d.ts       | 45 -------------------
 lib/node_modules/@stdlib/utils/lib/index.js   |  9 ----
 2 files changed, 54 deletions(-)

diff --git a/lib/node_modules/@stdlib/utils/docs/types/index.d.ts b/lib/node_modules/@stdlib/utils/docs/types/index.d.ts
index 5b83e832a32e..6af6c2aa5bf0 100644
--- a/lib/node_modules/@stdlib/utils/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/utils/docs/types/index.d.ts
@@ -30,7 +30,6 @@ import bifurcate = require( '@stdlib/utils/bifurcate' );
 import bifurcateBy = require( '@stdlib/utils/bifurcate-by' );
 import bifurcateIn = require( '@stdlib/utils/bifurcate-in' );
 import bifurcateOwn = require( '@stdlib/utils/bifurcate-own' );
-import commonKeysIn = require( '@stdlib/utils/common-keys-in' );
 import compose = require( '@stdlib/utils/compose' );
 import constantFunction = require( '@stdlib/utils/constant-function' );
 import constructorName = require( '@stdlib/utils/constructor-name' );
@@ -570,50 +569,6 @@ interface Namespace {
 	*/
 	bifurcateOwn: typeof bifurcateOwn;
 
-	/**
-	* Returns the common own and inherited property names of two or more objects.
-	*
-	* @param obj1 - first object
-	* @param obj2 - second object
-	* @param obj - additional objects
-	* @returns common keys
-	*
-	* @example
-	* var obj = {
-	*     'a': 1,
-	*     'b': 2,
-	*     'c': 3
-	* };
-	*
-	* var obj2 = {
-	*     'a': 1,
-	*     'b': 2
-	* };
-	*
-	* var keys = ns.commonKeysIn( obj, obj2 );
-	* // returns [ 'a', 'b' ]
-	*
-	* @example
-	* var obj1 = {
-	*     'a': 1,
-	*     'b': 2,
-	*     'c': 3
-	* };
-	*
-	* var obj2 = {
-	*     'a': 1,
-	*     'b': 2
-	* };
-	*
-	* var obj3 = {
-	*     'a': 1,
-	* };
-	*
-	* var keys = ns.commonKeysIn( obj1, obj2, obj3 );
-	* // returns [ 'a' ]
-	*/
-	commonKeysIn: typeof commonKeysIn;
-
 	/**
 	* Function composition.
 	*
diff --git a/lib/node_modules/@stdlib/utils/lib/index.js b/lib/node_modules/@stdlib/utils/lib/index.js
index e86b750197f3..badc25367154 100644
--- a/lib/node_modules/@stdlib/utils/lib/index.js
+++ b/lib/node_modules/@stdlib/utils/lib/index.js
@@ -130,15 +130,6 @@ setReadOnly( utils, 'bifurcateIn', require( '@stdlib/utils/bifurcate-in' ) );
 */
 setReadOnly( utils, 'bifurcateOwn', require( '@stdlib/utils/bifurcate-own' ) );
 
-/**
-* @name commonKeysIn
-* @memberof utils
-* @readonly
-* @type {Function}
-* @see {@link module:@stdlib/utils/common-keys-in}
-*/
-setReadOnly( utils, 'commonKeysIn', require( '@stdlib/utils/common-keys-in' ) );
-
 /**
 * @name compose
 * @memberof utils

From e642d022599039169156fe686192248cf3d70599 Mon Sep 17 00:00:00 2001
From: NEERAJ <neerajrpathak710@gmail.com>
Date: Sat, 27 Dec 2025 14:53:45 +0530
Subject: [PATCH 3/4] refactor: update paths

Ref: https://github.com/stdlib-js/stdlib/issues/8755
---
 lib/node_modules/@stdlib/namespace/alias2pkg/data/data.csv  | 2 +-
 lib/node_modules/@stdlib/namespace/lib/namespace/c.js       | 6 +++---
 lib/node_modules/@stdlib/namespace/pkg2alias/data/data.csv  | 2 +-
 .../@stdlib/namespace/pkg2related/data/data.csv             | 4 ++--
 .../@stdlib/namespace/pkg2standalone/data/data.csv          | 2 +-
 .../@stdlib/namespace/standalone2pkg/data/data.csv          | 2 +-
 6 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/node_modules/@stdlib/namespace/alias2pkg/data/data.csv b/lib/node_modules/@stdlib/namespace/alias2pkg/data/data.csv
index af8abb5a877a..0beda5c23b05 100644
--- a/lib/node_modules/@stdlib/namespace/alias2pkg/data/data.csv
+++ b/lib/node_modules/@stdlib/namespace/alias2pkg/data/data.csv
@@ -1527,7 +1527,7 @@ close,"@stdlib/fs/close"
 CMUDICT,"@stdlib/datasets/cmudict"
 codePointAt,"@stdlib/string/code-point-at"
 commonKeys,"@stdlib/object/common-keys"
-commonKeysIn,"@stdlib/utils/common-keys-in"
+commonKeysIn,"@stdlib/object/common-keys-in"
 complex,"@stdlib/complex/cmplx"
 Complex64,"@stdlib/complex/float32/ctor"
 COMPLEX64_NAN,"@stdlib/constants/complex64/nan"
diff --git a/lib/node_modules/@stdlib/namespace/lib/namespace/c.js b/lib/node_modules/@stdlib/namespace/lib/namespace/c.js
index ea2b799c076d..0fe8879a78da 100644
--- a/lib/node_modules/@stdlib/namespace/lib/namespace/c.js
+++ b/lib/node_modules/@stdlib/namespace/lib/namespace/c.js
@@ -208,15 +208,15 @@ ns.push({
 	'value': require( '@stdlib/object/common-keys' ),
 	'type': 'Function',
 	'related': [
-		'@stdlib/utils/common-keys-in',
+		'@stdlib/object/common-keys-in',
 		'@stdlib/utils/keys'
 	]
 });
 
 ns.push({
 	'alias': 'commonKeysIn',
-	'path': '@stdlib/utils/common-keys-in',
-	'value': require( '@stdlib/utils/common-keys-in' ),
+	'path': '@stdlib/object/common-keys-in',
+	'value': require( '@stdlib/object/common-keys-in' ),
 	'type': 'Function',
 	'related': [
 		'@stdlib/object/common-keys',
diff --git a/lib/node_modules/@stdlib/namespace/pkg2alias/data/data.csv b/lib/node_modules/@stdlib/namespace/pkg2alias/data/data.csv
index 2f930f5f45ab..129167495b6f 100644
--- a/lib/node_modules/@stdlib/namespace/pkg2alias/data/data.csv
+++ b/lib/node_modules/@stdlib/namespace/pkg2alias/data/data.csv
@@ -1527,7 +1527,7 @@
 "@stdlib/datasets/cmudict",CMUDICT
 "@stdlib/string/code-point-at",codePointAt
 "@stdlib/object/common-keys",commonKeys
-"@stdlib/utils/common-keys-in",commonKeysIn
+"@stdlib/object/common-keys-in",commonKeysIn
 "@stdlib/complex/cmplx",complex
 "@stdlib/complex/float32/ctor",Complex64
 "@stdlib/constants/complex64/nan",COMPLEX64_NAN
diff --git a/lib/node_modules/@stdlib/namespace/pkg2related/data/data.csv b/lib/node_modules/@stdlib/namespace/pkg2related/data/data.csv
index 62ad5fb13206..522dc6186513 100644
--- a/lib/node_modules/@stdlib/namespace/pkg2related/data/data.csv
+++ b/lib/node_modules/@stdlib/namespace/pkg2related/data/data.csv
@@ -1526,8 +1526,8 @@
 "@stdlib/fs/close","@stdlib/fs/exists,@stdlib/fs/open,@stdlib/fs/read-file"
 "@stdlib/datasets/cmudict",""
 "@stdlib/string/code-point-at","@stdlib/string/from-code-point"
-"@stdlib/object/common-keys","@stdlib/utils/common-keys-in,@stdlib/utils/keys"
-"@stdlib/utils/common-keys-in","@stdlib/object/common-keys,@stdlib/utils/keys-in"
+"@stdlib/object/common-keys","@stdlib/object/common-keys-in,@stdlib/utils/keys"
+"@stdlib/object/common-keys-in","@stdlib/object/common-keys,@stdlib/utils/keys-in"
 "@stdlib/complex/cmplx","@stdlib/complex/float64/ctor,@stdlib/complex/float32/ctor"
 "@stdlib/complex/float32/ctor","@stdlib/complex/cmplx,@stdlib/complex/float64/ctor"
 "@stdlib/constants/complex64/nan","@stdlib/constants/complex128/nan"
diff --git a/lib/node_modules/@stdlib/namespace/pkg2standalone/data/data.csv b/lib/node_modules/@stdlib/namespace/pkg2standalone/data/data.csv
index 167e74ea8ead..60bdd7af0bc3 100644
--- a/lib/node_modules/@stdlib/namespace/pkg2standalone/data/data.csv
+++ b/lib/node_modules/@stdlib/namespace/pkg2standalone/data/data.csv
@@ -1527,7 +1527,7 @@
 "@stdlib/datasets/cmudict","@stdlib/datasets-cmudict"
 "@stdlib/string/code-point-at","@stdlib/string-code-point-at"
 "@stdlib/object/common-keys","@stdlib/object-common-keys"
-"@stdlib/utils/common-keys-in","@stdlib/utils-common-keys-in"
+"@stdlib/object/common-keys-in","@stdlib/object-common-keys-in"
 "@stdlib/complex/cmplx","@stdlib/complex-cmplx"
 "@stdlib/complex/float32/ctor","@stdlib/complex-float32-ctor"
 "@stdlib/constants/complex64/nan","@stdlib/constants-complex64-nan"
diff --git a/lib/node_modules/@stdlib/namespace/standalone2pkg/data/data.csv b/lib/node_modules/@stdlib/namespace/standalone2pkg/data/data.csv
index a1a35021f95d..1571d9805f5e 100644
--- a/lib/node_modules/@stdlib/namespace/standalone2pkg/data/data.csv
+++ b/lib/node_modules/@stdlib/namespace/standalone2pkg/data/data.csv
@@ -1527,7 +1527,7 @@
 "@stdlib/datasets-cmudict","@stdlib/datasets/cmudict"
 "@stdlib/string-code-point-at","@stdlib/string/code-point-at"
 "@stdlib/object-common-keys","@stdlib/object/common-keys"
-"@stdlib/utils-common-keys-in","@stdlib/utils/common-keys-in"
+"@stdlib/object-common-keys-in","@stdlib/object/common-keys-in"
 "@stdlib/complex-cmplx","@stdlib/complex/cmplx"
 "@stdlib/complex-float32-ctor","@stdlib/complex/float32/ctor"
 "@stdlib/constants-complex64-nan","@stdlib/constants/complex64/nan"

From 2a46d3240d3c8c0049fc24aff17f3424e996676a Mon Sep 17 00:00:00 2001
From: NEERAJ <neerajrpathak710@gmail.com>
Date: Sat, 27 Dec 2025 14:54:39 +0530
Subject: [PATCH 4/4] remove: remove `utils/common-keys-in`

This commit removes `@stdlib/utils/common-keys-in` in favor of
`@stdlib/object/common-keys-in`.

BREAKING CHANGE: remove `utils/common-keys-in`

To migrate, users should update their require/import paths to use
`@stdlib/object/common-keys-in` which provides the same API and implementation.

Ref: https://github.com/stdlib-js/stdlib/issues/8755
---
 .../@stdlib/utils/common-keys-in/README.md    | 125 -----------
 .../common-keys-in/benchmark/benchmark.js     |  71 ------
 .../benchmark/benchmark.num_arguments.js      | 107 ---------
 .../benchmark/benchmark.num_properties.js     | 104 ---------
 .../utils/common-keys-in/docs/repl.txt        |  29 ---
 .../common-keys-in/docs/types/index.d.ts      |  70 ------
 .../utils/common-keys-in/docs/types/test.ts   |  33 ---
 .../utils/common-keys-in/examples/index.js    |  41 ----
 .../@stdlib/utils/common-keys-in/lib/index.js |  51 -----
 .../@stdlib/utils/common-keys-in/lib/main.js  | 106 ---------
 .../@stdlib/utils/common-keys-in/package.json |  72 -------
 .../@stdlib/utils/common-keys-in/test/test.js | 204 ------------------
 12 files changed, 1013 deletions(-)
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/README.md
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_arguments.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_properties.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/docs/repl.txt
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/docs/types/index.d.ts
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/docs/types/test.ts
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/examples/index.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/lib/index.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/lib/main.js
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/package.json
 delete mode 100644 lib/node_modules/@stdlib/utils/common-keys-in/test/test.js

diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/README.md b/lib/node_modules/@stdlib/utils/common-keys-in/README.md
deleted file mode 100644
index 08e94d47058f..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/README.md
+++ /dev/null
@@ -1,125 +0,0 @@
-<!--
-
-@license Apache-2.0
-
-Copyright (c) 2021 The Stdlib Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-   http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
--->
-
-# commonKeysIn
-
-> Return the common own and inherited property names of two or more objects.
-
-<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->
-
-<section class="intro">
-
-</section>
-
-<!-- /.intro -->
-
-<!-- Package usage documentation. -->
-
-<section class="usage">
-
-## Usage
-
-```javascript
-var commonKeysIn = require( '@stdlib/utils/common-keys-in' );
-```
-
-#### commonKeysIn( obj1, obj2\[, obj3\[,...,objN]] )
-
-Returns the common own and inherited property names of two or more objects.
-
-```javascript
-var obj = {
-    'a': 1,
-    'b': 2,
-    'c': 3
-};
-
-var obj2 = {
-    'a': 1,
-    'b': 2
-};
-
-var keys = commonKeysIn( obj, obj2 );
-// returns [ 'a', 'b' ]
-```
-
-</section>
-
-<!-- /.usage -->
-
-<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
-
-<section class="notes">
-
-</section>
-
-<!-- /.notes -->
-
-<!-- Package usage examples. -->
-
-<section class="examples">
-
-## Examples
-
-<!-- eslint no-undef: "error" -->
-
-```javascript
-var commonKeysIn = require( '@stdlib/utils/common-keys-in' );
-
-function Foo() {
-    this.beep = 'boop';
-    this.a = {
-        'b': 'c'
-    };
-    return this;
-}
-
-Foo.prototype.foo = [ 'bar' ];
-
-var obj1 = new Foo();
-
-var obj2 = {
-    'beep': 'boop',
-    'foo': 'bar'
-};
-
-var keys = commonKeysIn( obj1, obj2 );
-// returns [ 'beep', 'foo' ]
-```
-
-</section>
-
-<!-- /.examples -->
-
-<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
-
-<section class="references">
-
-</section>
-
-<!-- /.references -->
-
-<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->
-
-<section class="links">
-
-</section>
-
-<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.js b/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.js
deleted file mode 100644
index 7a4795874ea0..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.js
+++ /dev/null
@@ -1,71 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var bench = require( '@stdlib/bench' );
-var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
-var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
-var fromCodePoint = require( '@stdlib/string/from-code-point' );
-var pkg = require( './../package.json' ).name;
-var commonKeysIn = require( './../lib' );
-
-
-// MAIN //
-
-bench( pkg, function benchmark( b ) {
-	var obj1;
-	var obj2;
-	var out;
-	var i;
-
-	obj1 = {
-		'b': 3.141592653589793,
-		'c': {
-			'c1': 'bap',
-			'c3': {
-				'c3b': 5,
-				'c3c': 'bop'
-			},
-			'c4': 1337
-		},
-		'd': [ 4, 5, 6 ],
-		'e': true
-	};
-	b.tic();
-	for ( i = 0; i < b.iterations; i++ ) {
-		obj2 = {
-			'a': 'beep',
-			'b': 'baz',
-			'c': 'boop'
-		};
-		obj2[ fromCodePoint( i%126 ) ] = 'bar';
-		out = commonKeysIn( obj1, obj2 );
-		if ( typeof out !== 'object' ) {
-			b.fail( 'should return an object' );
-		}
-	}
-	b.toc();
-	if ( !isStringArray( out ) && !isEmptyArray( out ) ) {
-		b.fail( 'should return an array of strings' );
-	}
-	b.pass( 'benchmark finished' );
-	b.end();
-});
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_arguments.js b/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_arguments.js
deleted file mode 100644
index c7aea10dc45e..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_arguments.js
+++ /dev/null
@@ -1,107 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var bench = require( '@stdlib/bench' );
-var pow = require( '@stdlib/math/base/special/pow' );
-var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
-var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
-var pkg = require( './../package.json' ).name;
-var commonKeysIn = require( './../lib' );
-
-
-// FUNCTIONS //
-
-/**
-* Creates a benchmark function.
-*
-* @private
-* @param {PositiveInteger} N - number of arguments
-* @returns {Function} benchmark function
-*/
-function createBenchmark( N ) {
-	var args;
-	var o;
-	var i;
-	var j;
-
-	args = [];
-	for ( i = 0; i < N; i++ ) {
-		o = {};
-		for ( j = 0; j < 10; j++ ) {
-			o[ j ] = i * j;
-		}
-		args.push( o );
-	}
-	return benchmark;
-
-	/**
-	* Benchmark function.
-	*
-	* @private
-	* @param {Benchmark} b - benchmark instance
-	*/
-	function benchmark( b ) {
-		var keys;
-		var i;
-
-		b.tic();
-		for ( i = 0; i < b.iterations; i++ ) {
-			keys = commonKeysIn.apply( null, args );
-			if ( typeof keys !== 'object' ) {
-				b.fail( 'should return an object' );
-			}
-		}
-		b.toc();
-		if ( !isStringArray( keys ) && !isEmptyArray( keys ) ) {
-			b.fail( 'should return an array of strings' );
-		}
-		b.pass( 'benchmark finished' );
-		b.end();
-	}
-}
-
-
-// MAIN //
-
-/**
-* Main execution sequence.
-*
-* @private
-*/
-function main() {
-	var len;
-	var min;
-	var max;
-	var f;
-	var i;
-
-	min = 1; // 2^min
-	max = 6; // 2^max
-
-	for ( i = min; i <= max; i++ ) {
-		len = pow( 2, i );
-		f = createBenchmark( len );
-		bench( pkg+':num_args='+len+',num_properties=10', f );
-	}
-}
-
-main();
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_properties.js b/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_properties.js
deleted file mode 100644
index e977bafe7f12..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/benchmark/benchmark.num_properties.js
+++ /dev/null
@@ -1,104 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var bench = require( '@stdlib/bench' );
-var pow = require( '@stdlib/math/base/special/pow' );
-var isStringArray = require( '@stdlib/assert/is-string-array' ).primitives;
-var isEmptyArray = require( '@stdlib/assert/is-empty-array' );
-var pkg = require( './../package.json' ).name;
-var commonKeysIn = require( './../lib' );
-
-
-// FUNCTIONS //
-
-/**
-* Creates a benchmark function.
-*
-* @private
-* @param {PositiveInteger} N - number of properties
-* @returns {Function} benchmark function
-*/
-function createBenchmark( N ) {
-	var x;
-	var y;
-	var i;
-
-	x = {};
-	y = {};
-	for ( i = 0; i < N; i++ ) {
-		x[ i ] = i;
-		y[ i ] = i + 1;
-	}
-	return benchmark;
-
-	/**
-	* Benchmark function.
-	*
-	* @private
-	* @param {Benchmark} b - benchmark instance
-	*/
-	function benchmark( b ) {
-		var keys;
-		var i;
-
-		b.tic();
-		for ( i = 0; i < b.iterations; i++ ) {
-			keys = commonKeysIn( x, y );
-			if ( typeof keys !== 'object' ) {
-				b.fail( 'should return an object' );
-			}
-		}
-		b.toc();
-		if ( !isStringArray( keys ) && !isEmptyArray( keys ) ) {
-			b.fail( 'should return an array of strings' );
-		}
-		b.pass( 'benchmark finished' );
-		b.end();
-	}
-}
-
-
-// MAIN //
-
-/**
-* Main execution sequence.
-*
-* @private
-*/
-function main() {
-	var len;
-	var min;
-	var max;
-	var f;
-	var i;
-
-	min = 1; // 10^min
-	max = 6; // 10^max
-
-	for ( i = min; i <= max; i++ ) {
-		len = pow( 10, i );
-		f = createBenchmark( len );
-		bench( pkg+':num_properties='+len, f );
-	}
-}
-
-main();
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/docs/repl.txt b/lib/node_modules/@stdlib/utils/common-keys-in/docs/repl.txt
deleted file mode 100644
index 792412fa2821..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/docs/repl.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-
-{{alias}}( obj1, obj2[, ...obj] )
-    Returns the common own and inherited property names of two or more objects.
-
-    Parameters
-    ----------
-    obj1: any
-        First object.
-
-    obj2: any
-        Second object.
-
-    obj: ...any (optional)
-        Additional objects.
-
-    Returns
-    -------
-    out: Array<string>
-        Common keys.
-
-    Examples
-    --------
-    > var obj1 = { 'a': 1, 'b': 2 };
-    > var obj2 = { 'a': 1, 'b': 2, 'c': 3, 'd': 4 };
-    > var keys = {{alias}}( obj1, obj2 )
-    [ 'a', 'b' ]
-
-    See Also
-    --------
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/index.d.ts b/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/index.d.ts
deleted file mode 100644
index 9238351b757c..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/index.d.ts
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-// TypeScript Version: 4.1
-
-/// <reference types="@stdlib/types"/>
-
-/**
-* Returns the common own and inherited property names of two or more objects.
-*
-* @param obj1 - first object
-* @param obj2 - second object
-* @param obj - additional objects
-* @returns common keys
-*
-* @example
-* var obj = {
-*     'a': 1,
-*     'b': 2,
-*     'c': 3
-* };
-*
-* var obj2 = {
-*     'a': 1,
-*     'b': 2
-* };
-*
-* var keys = commonKeysIn( obj, obj2 );
-* // returns [ 'a', 'b' ]
-*
-* @example
-* var obj1 = {
-*     'a': 1,
-*     'b': 2,
-*     'c': 3
-* };
-*
-* var obj2 = {
-*     'a': 1,
-*     'b': 2
-* };
-*
-* var obj3 = {
-*     'a': 1,
-* };
-*
-* var keys = commonKeysIn( obj1, obj2, obj3 );
-* // returns [ 'a' ]
-*/
-declare function commonKeysIn( obj1: any, obj2: any, ...obj: Array<any> ): Array<string>;
-
-
-// EXPORTS //
-
-export = commonKeysIn;
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/test.ts b/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/test.ts
deleted file mode 100644
index 63cb933fc170..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/docs/types/test.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-import commonKeysIn = require( './index' );
-
-
-// TESTS //
-
-// The function returns an array of strings...
-{
-	commonKeysIn( { 'a': 0, 'b': 1 }, { 'a': 0 } ); // $ExpectType string[]
-}
-
-// The compiler throws an error if the function is provided insufficient arguments...
-{
-	commonKeysIn(); // $ExpectError
-	commonKeysIn( {} ); // $ExpectError
-}
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/examples/index.js b/lib/node_modules/@stdlib/utils/common-keys-in/examples/index.js
deleted file mode 100644
index e9124fd7d531..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/examples/index.js
+++ /dev/null
@@ -1,41 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-var commonKeysIn = require( './../lib' );
-
-function Foo() {
-	this.beep = 'boop';
-	this.a = {
-		'b': 'c'
-	};
-	return this;
-}
-
-Foo.prototype.foo = [ 'bar' ];
-
-var obj1 = new Foo();
-
-var obj2 = {
-	'beep': 'boop',
-	'foo': 'bar'
-};
-
-console.log( commonKeysIn( obj1, obj2 ) );
-// => [ 'beep', 'foo' ]
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/lib/index.js b/lib/node_modules/@stdlib/utils/common-keys-in/lib/index.js
deleted file mode 100644
index 71aef90222c0..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/lib/index.js
+++ /dev/null
@@ -1,51 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-/**
-* Return the common own and inherited property names of two or more objects.
-*
-* @module @stdlib/utils/common-keys-in
-*
-* @example
-* var commonKeysIn = require( '@stdlib/utils/common-keys-in' );
-*
-* var obj = {
-*     'a': 1,
-*     'b': 2,
-*     'c': 3
-* };
-*
-* var obj2 = {
-*     'a': 1,
-*     'b': 2
-* };
-*
-* var keys = commonKeysIn( obj, obj2 );
-* // returns [ 'a', 'b' ]
-*/
-
-// MODULES //
-
-var main = require( './main.js' );
-
-
-// EXPORTS //
-
-module.exports = main;
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/lib/main.js b/lib/node_modules/@stdlib/utils/common-keys-in/lib/main.js
deleted file mode 100644
index beb3ab6f7b10..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/lib/main.js
+++ /dev/null
@@ -1,106 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var keysIn = require( '@stdlib/utils/keys-in' );
-var hasProp = require( '@stdlib/assert/has-property' );
-
-
-// MAIN //
-
-/**
-* Returns the common own and inherited property names of two or more objects.
-*
-* @param {*} obj1 - first object
-* @param {*} obj2 - second object
-* @param {...*} [obj] - additional objects
-* @throws {Error} must provide at least two objects
-* @returns {(StringArray|EmptyArray)} common keys
-*
-* @example
-* var obj = {
-*     'a': 1,
-*     'b': 2,
-*     'c': 3
-* };
-*
-* var obj2 = {
-*     'a': 1,
-*     'b': 2
-* };
-*
-* var keys = commonKeysIn( obj, obj2 );
-* // returns [ 'a', 'b' ]
-*
-* @example
-* var obj1 = {
-*     'a': 1,
-*     'b': 2,
-*     'c': 3
-* };
-*
-* var obj2 = {
-*     'a': 1,
-*     'b': 2
-* };
-*
-* var obj3 = {
-*     'a': 1,
-* };
-*
-* var keys = commonKeysIn( obj1, obj2, obj3 );
-* // returns [ 'a' ]
-*/
-function commonKeysIn() {
-	var nargs;
-	var keys;
-	var arg;
-	var ptr;
-	var N;
-	var i;
-	var j;
-
-	nargs = arguments.length;
-	if ( nargs < 2 ) {
-		throw new Error( 'insufficient arguments. Must provide at least two objects.' );
-	}
-	keys = keysIn( arguments[ 0 ] );
-	N = keys.length;
-
-	for ( i = 1; i < nargs; i++ ) {
-		arg = arguments[ i ];
-		ptr = 0;
-		for ( j = 0; j < N; j++ ) {
-			if ( hasProp( arg, keys[ j ] ) ) {
-				keys[ ptr ] = keys[ j ];
-				ptr += 1;
-			}
-		}
-		N = ptr;
-	}
-	keys.length = N;
-	return keys;
-}
-
-
-// EXPORTS //
-
-module.exports = commonKeysIn;
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/package.json b/lib/node_modules/@stdlib/utils/common-keys-in/package.json
deleted file mode 100644
index 161dce1fdaf5..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/package.json
+++ /dev/null
@@ -1,72 +0,0 @@
-{
-  "name": "@stdlib/utils/common-keys-in",
-  "version": "0.0.0",
-  "description": "Return the common own and inherited property names of two or more objects.",
-  "license": "Apache-2.0",
-  "author": {
-    "name": "The Stdlib Authors",
-    "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
-  },
-  "contributors": [
-    {
-      "name": "The Stdlib Authors",
-      "url": "https://github.com/stdlib-js/stdlib/graphs/contributors"
-    }
-  ],
-  "main": "./lib",
-  "directories": {
-    "benchmark": "./benchmark",
-    "doc": "./docs",
-    "example": "./examples",
-    "lib": "./lib",
-    "test": "./test"
-  },
-  "types": "./docs/types",
-  "scripts": {},
-  "homepage": "https://github.com/stdlib-js/stdlib",
-  "repository": {
-    "type": "git",
-    "url": "git://github.com/stdlib-js/stdlib.git"
-  },
-  "bugs": {
-    "url": "https://github.com/stdlib-js/stdlib/issues"
-  },
-  "dependencies": {},
-  "devDependencies": {},
-  "engines": {
-    "node": ">=0.10.0",
-    "npm": ">2.7.0"
-  },
-  "os": [
-    "aix",
-    "darwin",
-    "freebsd",
-    "linux",
-    "macos",
-    "openbsd",
-    "sunos",
-    "win32",
-    "windows"
-  ],
-  "keywords": [
-    "stdlib",
-    "stdutils",
-    "stdutil",
-    "utilities",
-    "utility",
-    "utils",
-    "util",
-    "object",
-    "obj",
-    "names",
-    "keys",
-    "enumerable",
-    "own",
-    "common",
-    "shared",
-    "properties",
-    "props",
-    "inherited",
-    "prototype"
-  ]
-}
diff --git a/lib/node_modules/@stdlib/utils/common-keys-in/test/test.js b/lib/node_modules/@stdlib/utils/common-keys-in/test/test.js
deleted file mode 100644
index 28ecc1d6e82e..000000000000
--- a/lib/node_modules/@stdlib/utils/common-keys-in/test/test.js
+++ /dev/null
@@ -1,204 +0,0 @@
-/**
-* @license Apache-2.0
-*
-* Copyright (c) 2021 The Stdlib Authors.
-*
-* Licensed under the Apache License, Version 2.0 (the "License");
-* you may not use this file except in compliance with the License.
-* You may obtain a copy of the License at
-*
-*    http://www.apache.org/licenses/LICENSE-2.0
-*
-* Unless required by applicable law or agreed to in writing, software
-* distributed under the License is distributed on an "AS IS" BASIS,
-* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-* See the License for the specific language governing permissions and
-* limitations under the License.
-*/
-
-'use strict';
-
-// MODULES //
-
-var tape = require( 'tape' );
-var commonKeysIn = require( './../lib' );
-
-
-// TESTS //
-
-tape( 'main export is a function', function test( t ) {
-	t.ok( true, __filename );
-	t.strictEqual( typeof commonKeysIn, 'function', 'main export is a function' );
-	t.end();
-});
-
-tape( 'the function throws an error if provided insufficient arguments', function test( t ) {
-	t.throws( foo, Error, 'throws error' );
-	t.throws( bar, Error, 'throws error' );
-	t.end();
-	function foo() {
-		commonKeysIn();
-	}
-	function bar() {
-		commonKeysIn( {} );
-	}
-});
-
-tape( 'the function returns an array of common property names (two objects)', function test( t ) {
-	var expected;
-	var actual;
-	var obj1;
-	var obj2;
-	var obj3;
-
-	obj1 = {
-		'a': 1,
-		'b': 2,
-		'c': 3,
-		'd': 4
-	};
-	obj2 = {
-		'a': 1,
-		'b': 2,
-		'c': 3
-	};
-	obj3 = {
-		'c': 3,
-		'd': 4
-	};
-
-	actual = commonKeysIn( obj1, obj2 );
-	expected = [ 'a', 'b', 'c' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj1, obj3 );
-	expected = [ 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj2, obj3 );
-	expected = [ 'c' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	t.end();
-});
-
-tape( 'the function returns an array of common property names (multiple objects)', function test( t ) {
-	var expected;
-	var actual;
-	var obj1;
-	var obj2;
-	var obj3;
-	var obj4;
-
-	obj1 = {
-		'a': 1,
-		'b': 2,
-		'c': 3,
-		'd': 4,
-		'e': 5,
-		'f': 6
-	};
-	obj2 = {
-		'a': 1,
-		'b': 2,
-		'c': 3,
-		'd': 4,
-		'f': 6
-	};
-	obj3 = {
-		'a': 1,
-		'c': 3,
-		'd': 4
-	};
-	obj4 = {
-		'a': 1,
-		'b': 2
-	};
-
-	actual = commonKeysIn( obj1, obj2, obj3, obj4 );
-	expected = [ 'a' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj2, obj3, obj4 );
-	expected = [ 'a' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj3, obj2, obj1 );
-	expected = [ 'a', 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj4, obj2, obj1 );
-	expected = [ 'a', 'b' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj2, obj1, obj3 );
-	expected = [ 'a', 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	t.end();
-});
-
-tape( 'the function returns an array of common property names (arrays, strings)', function test( t ) {
-	var expected;
-	var actual;
-	var x;
-	var y;
-
-	x = [ 0, 1, 2, 3, 4, 5, 6, 7, 8 ];
-	y = [ 5, 6, 7, 8, 9 ];
-	expected = [ '0', '1', '2', '3', '4' ];
-	actual = commonKeysIn( x, y );
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	x = {
-		'0': 0,
-		'2': 2
-	};
-	y = [ 0, 1, 2 ];
-	expected = [ '0', '2' ];
-	actual = commonKeysIn( x, y );
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	x = 'abcd';
-	y = 'abcdef';
-	expected = [ '0', '1', '2', '3' ];
-	actual = commonKeysIn( x, y );
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	t.end();
-});
-
-tape( 'the function returns an array of common property names (inherited properties)', function test( t ) {
-	var expected;
-	var actual;
-	var obj1;
-	var obj2;
-	var obj3;
-
-	obj1 = {
-		'a': 1,
-		'b': 2,
-		'c': 3,
-		'd': 4
-	};
-	obj2 = Object.create( obj1 );
-	obj2.e = 5;
-	obj2.f = 6;
-	obj3 = Object.create( obj2 );
-	obj3.g = 7;
-	obj3.h = 8;
-
-	actual = commonKeysIn( obj1, obj2, obj3 );
-	expected = [ 'a', 'b', 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj2, obj3 );
-	expected = [ 'e', 'f', 'a', 'b', 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	actual = commonKeysIn( obj3, obj3 );
-	expected = [ 'g', 'h', 'e', 'f', 'a', 'b', 'c', 'd' ];
-	t.deepEqual( actual, expected, 'returns expected keys' );
-
-	t.end();
-});