From 50c5f826a97e6237e6970cfbff05073c95287164 Mon Sep 17 00:00:00 2001
From: headlessNode <harriskhan047@outlook.com>
Date: Sun, 26 Apr 2026 01:38:15 +0500
Subject: [PATCH 1/2] feat: add ndarray/base/append-singleton-dimensions

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
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  - task: lint_markdown
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---
---
 .../append-singleton-dimensions/README.md     | 133 ++++++++++++++++++
 .../benchmark/benchmark.js                    | 115 +++++++++++++++
 .../benchmark/benchmark.ndims.js              |  93 ++++++++++++
 .../append-singleton-dimensions/docs/repl.txt |  30 ++++
 .../docs/types/index.d.ts                     |  47 +++++++
 .../docs/types/test.ts                        |  87 ++++++++++++
 .../examples/index.js                         |  29 ++++
 .../append-singleton-dimensions/lib/index.js  |  44 ++++++
 .../append-singleton-dimensions/lib/main.js   |  87 ++++++++++++
 .../append-singleton-dimensions/package.json  |  69 +++++++++
 .../append-singleton-dimensions/test/test.js  |  92 ++++++++++++
 11 files changed, 826 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/README.md
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.js
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.ndims.js
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/repl.txt
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/index.d.ts
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/test.ts
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/examples/index.js
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/package.json
 create mode 100644 lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/test/test.js

diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/README.md b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/README.md
new file mode 100644
index 000000000000..ff64b4aacf72
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/README.md
@@ -0,0 +1,133 @@
+<!--
+
+@license Apache-2.0
+
+Copyright (c) 2026 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.
+
+-->
+
+# appendSingletonDimensions
+
+> Append singleton dimensions.
+
+<!-- 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
+
+<!-- eslint-disable id-length -->
+
+```javascript
+var appendSingletonDimensions = require( '@stdlib/ndarray/base/append-singleton-dimensions' );
+```
+
+#### appendSingletonDimensions( x, n, writable )
+
+Returns an ndarray with a specified number of appended singleton dimensions (i.e., dimensions whose size is equal to `1`).
+
+<!-- eslint-disable id-length -->
+
+```javascript
+var array = require( '@stdlib/ndarray/array' );
+
+// Create a 2x2 ndarray:
+var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+// returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+
+// Append singleton dimensions:
+var y = appendSingletonDimensions( x, 3, false );
+// returns <ndarray>[ [ [ [ [ 1 ] ] ], [ [ [ 2 ] ] ] ], [ [ [ [ 3 ] ] ], [ [ [ 4 ] ] ] ] ]
+```
+
+The function accepts the following arguments:
+
+-   **x**: input ndarray.
+-   **n**: number of singleton dimensions to append.
+-   **writable**: boolean indicating whether a returned ndarray should be writable.
+
+</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">
+
+## Notes
+
+-   The `writable` parameter **only** applies to ndarray constructors supporting **read-only** instances.
+
+</section>
+
+<!-- /.notes -->
+
+<!-- Package usage examples. -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint-disable id-length -->
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var uniform = require( '@stdlib/random/uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var appendSingletonDimensions = require( '@stdlib/ndarray/base/append-singleton-dimensions' );
+
+var x = uniform( [ 3, 3, 3 ], -10.0, 10.0 );
+console.log( ndarray2array( x ) );
+
+var y = appendSingletonDimensions( x, 3, false );
+console.log( ndarray2array( y ) );
+```
+
+</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 related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->
+
+<section class="related">
+
+</section>
+
+<!-- /.related -->
+
+<!-- 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/ndarray/base/append-singleton-dimensions/benchmark/benchmark.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.js
new file mode 100644
index 000000000000..ad3661ec340d
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.js
@@ -0,0 +1,115 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 Float64Array = require( '@stdlib/array/float64' );
+var ndarrayBase = require( '@stdlib/ndarray/base/ctor' );
+var ndarray = require( '@stdlib/ndarray/ctor' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var appendSingletonDimensions = require( './../lib' );
+
+
+// MAIN //
+
+bench( format( '%s::base_ndarray,2d', pkg ), function benchmark( b ) {
+	var strides;
+	var values;
+	var buffer;
+	var offset;
+	var dtype;
+	var shape;
+	var order;
+	var out;
+	var i;
+
+	dtype = 'float64';
+	buffer = new Float64Array( 2 );
+	shape = [ 2 ];
+	strides = [ 1 ];
+	offset = 0;
+	order = 'row-major';
+
+	values = [
+		ndarrayBase( dtype, buffer, shape, strides, offset, order ),
+		ndarrayBase( dtype, buffer, shape, strides, offset, order ),
+		ndarrayBase( dtype, buffer, shape, strides, offset, order ),
+		ndarrayBase( dtype, buffer, shape, strides, offset, order ),
+		ndarrayBase( dtype, buffer, shape, strides, offset, order )
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = appendSingletonDimensions( values[ i%values.length ], 1, false );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isndarrayLike( out ) ) {
+		b.fail( 'should return an ndarray' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
+
+bench( format( '%s::ndarray,2d', pkg ), function benchmark( b ) {
+	var strides;
+	var values;
+	var buffer;
+	var offset;
+	var dtype;
+	var shape;
+	var order;
+	var out;
+	var i;
+
+	dtype = 'float64';
+	buffer = new Float64Array( 2 );
+	shape = [ 2 ];
+	strides = [ 1 ];
+	offset = 0;
+	order = 'row-major';
+
+	values = [
+		ndarray( dtype, buffer, shape, strides, offset, order ),
+		ndarray( dtype, buffer, shape, strides, offset, order ),
+		ndarray( dtype, buffer, shape, strides, offset, order ),
+		ndarray( dtype, buffer, shape, strides, offset, order ),
+		ndarray( dtype, buffer, shape, strides, offset, order )
+	];
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = appendSingletonDimensions( values[ i%values.length ], 1, false );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isndarrayLike( out ) ) {
+		b.fail( 'should return an ndarray' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.ndims.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.ndims.js
new file mode 100644
index 000000000000..7095a546f10c
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/benchmark/benchmark.ndims.js
@@ -0,0 +1,93 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 array = require( '@stdlib/ndarray/array' );
+var isndarrayLike = require( '@stdlib/assert/is-ndarray-like' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var appendSingletonDimensions = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} ndims - number of singleton dimensions
+* @returns {Function} benchmark function
+*/
+function createBenchmark( ndims ) {
+	var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var out;
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			out = appendSingletonDimensions( x, ndims, false );
+			if ( typeof out !== 'object' ) {
+				b.fail( 'should return an object' );
+			}
+		}
+		b.toc();
+		if ( !isndarrayLike( out ) ) {
+			b.fail( 'should return an ndarray' );
+		}
+		b.pass( 'benchmark finished' );
+		b.end();
+	}
+}
+
+
+// MAIN //
+
+/**
+* Main execution sequence.
+*
+* @private
+*/
+function main() {
+	var min;
+	var max;
+	var f;
+	var i;
+
+	min = 1;
+	max = 10;
+
+	for ( i = min; i <= max; i++ ) {
+		f = createBenchmark( i );
+		bench( format( '%s::ndarray,2d:singleton_dimensions=%d', pkg, i ), f );
+	}
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/repl.txt b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/repl.txt
new file mode 100644
index 000000000000..d358aa69a1a1
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/repl.txt
@@ -0,0 +1,30 @@
+
+{{alias}}( x, n, writable )
+    Returns an array with a specified number of appended singleton dimensions.
+
+    Parameters
+    ----------
+    x: ndarray
+        Input array.
+
+    n: integer
+        Number of singleton dimensions to append.
+
+    writable: boolean
+        Boolean indicating whether a returned array should be writable.
+
+    Returns
+    -------
+    out: ndarray
+        Output array.
+
+    Examples
+    --------
+    > var x = {{alias:@stdlib/ndarray/array}}( [ [ 1, 2 ], [ 3, 4 ] ] )
+    <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+    > var y = {{alias}}( x, 1, false )
+    <ndarray>[ [ [ 1 ], [ 2 ] ], [ [ 3 ], [ 4 ] ] ]
+
+    See Also
+    --------
+
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/index.d.ts b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/index.d.ts
new file mode 100644
index 000000000000..23e350efc6d1
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/index.d.ts
@@ -0,0 +1,47 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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"/>
+
+import { ndarray } from '@stdlib/types/ndarray';
+
+/**
+* Returns an array with a specified number of appended singleton dimensions.
+*
+* @param x - input array
+* @param n - number of singleton dimensions to append
+* @param writable - boolean indicating whether a returned array should be writable
+* @returns output array
+*
+* @example
+* var array = require( '@stdlib/ndarray/array' );
+*
+* var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+* // returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+*
+* var y = appendSingletonDimensions( x, 3, false );
+* // returns <ndarray>[ [ [ [ [ 1 ] ] ], [ [ [ 2 ] ] ] ], [ [ [ [ 3 ] ] ], [ [ [ 4 ] ] ] ] ]
+*/
+declare function appendSingletonDimensions<T extends ndarray>( x: T, n: number, writable: boolean ): T;
+
+
+// EXPORTS //
+
+export = appendSingletonDimensions;
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/test.ts b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/test.ts
new file mode 100644
index 000000000000..6d9588a8760a
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/docs/types/test.ts
@@ -0,0 +1,87 @@
+/*
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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.
+*/
+
+/* eslint-disable space-in-parens */
+
+import zeros = require( '@stdlib/ndarray/zeros' );
+import appendSingletonDimensions = require( './index' );
+
+
+// TESTS //
+
+// The function returns an ndarray...
+{
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
+
+	appendSingletonDimensions( x, 3, false ); // $ExpectType float64ndarray
+}
+
+// The compiler throws an error if the function is not provided a first argument which is an ndarray...
+{
+	appendSingletonDimensions( '5', 3, false ); // $ExpectError
+	appendSingletonDimensions( 5, 3, false ); // $ExpectError
+	appendSingletonDimensions( true, 3, false ); // $ExpectError
+	appendSingletonDimensions( false, 3, false ); // $ExpectError
+	appendSingletonDimensions( null, 3, false ); // $ExpectError
+	appendSingletonDimensions( {}, 3, false ); // $ExpectError
+	appendSingletonDimensions( [ '5' ], 3, false ); // $ExpectError
+	appendSingletonDimensions( ( x: number ): number => x, 3, false ); // $ExpectError
+}
+
+// The compiler throws an error if the function is not provided a second argument which is a number...
+{
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
+
+	appendSingletonDimensions( x, '5', false ); // $ExpectError
+	appendSingletonDimensions( x, true, false ); // $ExpectError
+	appendSingletonDimensions( x, false, false ); // $ExpectError
+	appendSingletonDimensions( x, null, false ); // $ExpectError
+	appendSingletonDimensions( x, {}, false ); // $ExpectError
+	appendSingletonDimensions( x, [ '5' ], false ); // $ExpectError
+	appendSingletonDimensions( x, ( x: number ): number => x, false ); // $ExpectError
+}
+
+// The compiler throws an error if the function is not provided a third argument which is a boolean...
+{
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
+
+	appendSingletonDimensions( x, 3, '5' ); // $ExpectError
+	appendSingletonDimensions( x, 3, 5 ); // $ExpectError
+	appendSingletonDimensions( x, 3, null ); // $ExpectError
+	appendSingletonDimensions( x, 3, {} ); // $ExpectError
+	appendSingletonDimensions( x, 3, [ '5' ] ); // $ExpectError
+	appendSingletonDimensions( x, 3, ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	const x = zeros( [ 2, 2 ], {
+		'dtype': 'float64'
+	});
+
+	appendSingletonDimensions(); // $ExpectError
+	appendSingletonDimensions( x ); // $ExpectError
+	appendSingletonDimensions( x, 3 ); // $ExpectError
+	appendSingletonDimensions( x, 3, false, [ 1, 2, 3 ], [ 2, 3 ] ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/examples/index.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/examples/index.js
new file mode 100644
index 000000000000..2bbf568d90fb
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/examples/index.js
@@ -0,0 +1,29 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 uniform = require( '@stdlib/random/uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var appendSingletonDimensions = require( './../lib' );
+
+var x = uniform( [ 3, 3, 3 ], -10.0, 10.0 );
+console.log( ndarray2array( x ) );
+
+var y = appendSingletonDimensions( x, 3, false );
+console.log( ndarray2array( y ) );
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/index.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/index.js
new file mode 100644
index 000000000000..56134df470ed
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/index.js
@@ -0,0 +1,44 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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';
+
+/**
+* Append singleton dimensions.
+*
+* @module @stdlib/ndarray/base/append-singleton-dimensions
+*
+* @example
+* var array = require( '@stdlib/ndarray/array' );
+* var appendSingletonDimensions = require( '@stdlib/ndarray/base/append-singleton-dimensions' );
+*
+* var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+* // returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+*
+* var y = appendSingletonDimensions( x, 3, false );
+* // returns <ndarray>[ [ [ [ [ 1 ] ] ], [ [ [ 2 ] ] ] ], [ [ [ [ 3 ] ] ], [ [ [ 4 ] ] ] ] ]
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
new file mode 100644
index 000000000000..a3d7f189c93d
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
@@ -0,0 +1,87 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 getDType = require( '@stdlib/ndarray/base/dtype' );
+var getShape = require( '@stdlib/ndarray/base/shape' );
+var getStrides = require( '@stdlib/ndarray/base/strides' );
+var getOffset = require( '@stdlib/ndarray/base/offset' );
+var getOrder = require( '@stdlib/ndarray/base/order' );
+var getData = require( '@stdlib/ndarray/base/data-buffer' );
+
+
+// MAIN //
+
+/**
+* Returns an array with a specified number of appended singleton dimensions.
+*
+* @param {ndarray} x - input array
+* @param {NonNegativeInteger} n - number of singleton dimensions to append
+* @param {boolean} writable - boolean indicating whether a returned array should be writable
+* @returns {ndarray} output array
+*
+* @example
+* var array = require( '@stdlib/ndarray/array' );
+*
+* var x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+* // returns <ndarray>[ [ 1, 2 ], [ 3, 4 ] ]
+*
+* var y = appendSingletonDimensions( x, 3, false );
+* // returns <ndarray>[ [ [ [ [ 1 ] ] ], [ [ [ 2 ] ] ] ], [ [ [ [ 3 ] ] ], [ [ [ 4 ] ] ] ] ]
+*/
+function appendSingletonDimensions( x, n, writable ) {
+	var strides;
+	var shape;
+	var sh;
+	var st;
+	var N;
+	var i;
+
+	sh = getShape( x, false );
+	st = getStrides( x, false );
+	N = sh.length;
+
+	strides = [];
+	shape = [];
+
+	// Copy existing dimensions...
+	for ( i = 0; i < N; i++ ) {
+		shape.push( sh[ i ] );
+		strides.push( st[ i ] );
+	}
+	// Append singleton dimensions...
+	for ( i = 0; i < n; i++ ) {
+		shape.push( 1 );
+		if ( N > 0 ) {
+			strides.push( st[ N-1 ] );
+		} else {
+			strides.push( st[ 0 ] );
+		}
+	}
+	return new x.constructor( getDType( x ), getData( x ), shape, strides, getOffset( x ), getOrder( x ), { // eslint-disable-line max-len
+		'readonly': !writable
+	});
+}
+
+
+// EXPORTS //
+
+module.exports = appendSingletonDimensions;
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/package.json b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/package.json
new file mode 100644
index 000000000000..c79850bb8d94
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/package.json
@@ -0,0 +1,69 @@
+{
+  "name": "@stdlib/ndarray/base/append-singleton-dimensions",
+  "version": "0.0.0",
+  "description": "Append singleton dimensions.",
+  "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",
+    "stdtypes",
+    "types",
+    "base",
+    "ndarray",
+    "expand",
+    "broadcast",
+    "reshape",
+    "singleton",
+    "multidimensional",
+    "array",
+    "utilities",
+    "utility",
+    "utils",
+    "util"
+  ],
+  "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/test/test.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/test/test.js
new file mode 100644
index 000000000000..da4f981bd772
--- /dev/null
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/test/test.js
@@ -0,0 +1,92 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2026 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 array = require( '@stdlib/ndarray/array' );
+var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var getShape = require( '@stdlib/ndarray/shape' );
+var getData = require( '@stdlib/ndarray/data-buffer' );
+var getStrides = require( '@stdlib/ndarray/strides' );
+var isReadOnly = require( '@stdlib/ndarray/base/assert/is-read-only' );
+var appendSingletonDimensions = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof appendSingletonDimensions, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function appends singleton dimensions', function test( t ) {
+	var x;
+	var y;
+
+	x = array( [ [ 1, 2 ], [ 3, 4 ] ] );
+
+	y = appendSingletonDimensions( x, 3, false );
+
+	t.notEqual( y, x, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 2, 2, 1, 1, 1 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
+	t.strictEqual( isReadOnly( y ), true, 'returns expected value' );
+
+	y = appendSingletonDimensions( x, 3, true );
+
+	t.notEqual( y, x, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 2, 2, 1, 1, 1 ], 'returns expected value' );
+	t.strictEqual( getData( y ), x.data, 'returns expected value' );
+	t.strictEqual( isReadOnly( y ), false, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function appends singleton dimensions (base; row-major)', function test( t ) {
+	var x;
+	var y;
+
+	x = ndarray( 'generic', [ 1, 2, 3, 4 ], [ 2, 1, 2 ], [ 2, 2, 1 ], 0, 'row-major' );
+	y = appendSingletonDimensions( x, 3, false );
+
+	t.notEqual( y, x, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 2, 1, 2, 1, 1, 1 ], 'returns expected value' );
+	t.deepEqual( getStrides( y ), [ 2, 2, 1, 1, 1, 1 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function appends singleton dimensions (base; column-major)', function test( t ) {
+	var x;
+	var y;
+
+	x = ndarray( 'generic', [ 1, 2, 3, 4 ], [ 2, 1, 2 ], [ 1, 2, 2 ], 0, 'column-major' );
+	y = appendSingletonDimensions( x, 3, false );
+
+	t.notEqual( y, x, 'returns expected value' );
+	t.deepEqual( getShape( y ), [ 2, 1, 2, 1, 1, 1 ], 'returns expected value' );
+	t.deepEqual( getStrides( y ), [ 1, 2, 2, 2, 2, 2 ], 'returns expected value' );
+	t.strictEqual( getData( y ), getData( x ), 'returns expected value' );
+
+	t.end();
+});

From f33c77b999ac1878a2abdb0fc3077422a72a8be2 Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Sat, 25 Apr 2026 15:57:48 -0700
Subject: [PATCH 2/2] refactor: simplify loop

Signed-off-by: Athan <kgryte@gmail.com>
---
 .../ndarray/base/append-singleton-dimensions/lib/main.js  | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
index a3d7f189c93d..a17e302dd336 100644
--- a/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
+++ b/lib/node_modules/@stdlib/ndarray/base/append-singleton-dimensions/lib/main.js
@@ -53,6 +53,7 @@ function appendSingletonDimensions( x, n, writable ) {
 	var sh;
 	var st;
 	var N;
+	var s;
 	var i;
 
 	sh = getShape( x, false );
@@ -68,13 +69,10 @@ function appendSingletonDimensions( x, n, writable ) {
 		strides.push( st[ i ] );
 	}
 	// Append singleton dimensions...
+	s = ( N > 0 ) ? st[ N-1 ] : st[ 0 ];
 	for ( i = 0; i < n; i++ ) {
 		shape.push( 1 );
-		if ( N > 0 ) {
-			strides.push( st[ N-1 ] );
-		} else {
-			strides.push( st[ 0 ] );
-		}
+		strides.push( s );
 	}
 	return new x.constructor( getDType( x ), getData( x ), shape, strides, getOffset( x ), getOrder( x ), { // eslint-disable-line max-len
 		'readonly': !writable