From b2fb90d8cc572da015a884e9c2698dff6ae51d5a Mon Sep 17 00:00:00 2001
From: Karan Anand <anandkarancompsci@gmail.com>
Date: Sun, 21 Jun 2026 20:47:22 -0700
Subject: [PATCH 1/3] feat: add `blas/ext/base/ndarray/dxsy`

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description: Results of running static analysis checks when committing changes.
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---
 .../blas/ext/base/ndarray/dxsy/README.md      | 131 ++++++++++
 .../base/ndarray/dxsy/benchmark/benchmark.js  | 103 ++++++++
 .../blas/ext/base/ndarray/dxsy/docs/repl.txt  |  34 +++
 .../base/ndarray/dxsy/docs/types/index.d.ts   |  52 ++++
 .../ext/base/ndarray/dxsy/docs/types/test.ts  |  63 +++++
 .../ext/base/ndarray/dxsy/examples/index.js   |  36 +++
 .../blas/ext/base/ndarray/dxsy/lib/index.js   |  44 ++++
 .../blas/ext/base/ndarray/dxsy/lib/main.js    |  67 +++++
 .../blas/ext/base/ndarray/dxsy/package.json   |  73 ++++++
 .../blas/ext/base/ndarray/dxsy/test/test.js   | 234 ++++++++++++++++++
 10 files changed, 837 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/benchmark/benchmark.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/test.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/examples/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/test/test.js

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
new file mode 100644
index 000000000000..f316f528423a
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
@@ -0,0 +1,131 @@
+<!--
+
+@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.
+
+-->
+
+# dxsy
+
+> Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.
+
+<section class="intro">
+
+This BLAS extension implements the operation
+
+<!-- <equation class="equation" label="eq:xsy" align="center" raw="\mathbf{y} = \mathbf{x} - \mathbf{y}" alt="Equation for xsy operation."> -->
+
+```math
+\mathbf{y} = \mathbf{x} - \mathbf{y}
+```
+
+<!-- </equation> -->
+
+This API is a specialized version of the package [`@stdlib/blas/ext/base/ndarray/daxpby`][@stdlib/blas/ext/base/ndarray/daxpby] with `α = 1` and `β = -1` and performs element-wise subtraction between two vectors.
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var dxsy = require( '@stdlib/blas/ext/base/ndarray/dxsy' );
+```
+
+#### dxsy( arrays )
+
+Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+var y = new Float64Vector( [ 2.0, 4.0, 6.0, 8.0, 10.0 ] );
+
+dxsy( [ x, y ] );
+// y => <ndarray>[ -1.0, -2.0, -3.0, -4.0, -5.0 ]
+```
+
+The function has the following parameters:
+
+-   **arrays**: array-like object containing the following ndarrays:
+
+    -   a one-dimensional input ndarray.
+    -   a one-dimensional output ndarray.
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   The output ndarray is modified **in-place** (i.e., the output ndarray is **mutated**).
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var discreteUniform = require( '@stdlib/random/discrete-uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dxsy = require( '@stdlib/blas/ext/base/ndarray/dxsy' );
+
+var opts = {
+    'dtype': 'float64'
+};
+
+var x = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( x ) );
+
+var y = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( y ) );
+
+dxsy( [ x, y ] );
+console.log( ndarray2array( y ) );
+```
+
+</section>
+
+<!-- /.examples -->
+
+<!-- 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">
+
+[@stdlib/blas/ext/base/ndarray/daxpby]: https://github.com/stdlib-js/stdlib/tree/develop/lib/node_modules/@stdlib/blas/ext/base/ndarray/daxpby
+
+</section>
+
+<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/benchmark/benchmark.js
new file mode 100644
index 000000000000..85d71d054586
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/benchmark/benchmark.js
@@ -0,0 +1,103 @@
+/**
+* @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 uniform = require( '@stdlib/random/uniform' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dxsy = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+	'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - ndarray length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+	var x = uniform( [ len ], -100.0, 100.0, options );
+	var y = uniform( [ len ], -100.0, 100.0, options );
+	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 = dxsy( [ x, y ] );
+			if ( typeof out !== 'object' ) {
+				b.fail( 'should return an ndarray' );
+			}
+		}
+		b.toc();
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an ndarray' );
+		}
+		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( format( '%s:len=%d', pkg, len ), f );
+	}
+}
+
+main();
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
new file mode 100644
index 000000000000..7e96469642b3
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
@@ -0,0 +1,34 @@
+
+{{alias}}( arrays )
+    Subtracts the second one-dimensional double-precision floating-point ndarray
+    from the first one-dimensional double-precision floating-point ndarray and
+    assigns the results to the second ndarray.
+
+    The output ndarray is modified *in-place* (i.e., the output ndarray is
+    *mutated*).
+
+    Parameters
+    ----------
+    arrays: ArrayLikeObject<ndarray>
+        Array-like object containing the following ndarrays:
+
+        - a one-dimensional input ndarray.
+        - a one-dimensional output ndarray.
+
+    Returns
+    -------
+    out: ndarray
+        Output ndarray.
+
+    Examples
+    --------
+    > var xbuf = [ 1.0, 2.0, 3.0, 4.0 ];
+    > var x = new {{alias:@stdlib/ndarray/vector/float64}}( xbuf );
+    > var ybuf = [ 2.0, 4.0, 6.0, 8.0 ];
+    > var y = new {{alias:@stdlib/ndarray/vector/float64}}( ybuf );
+    > {{alias}}( [ x, y ] )
+    <ndarray>[ -1.0, -2.0, -3.0, -4.0 ]
+
+    See Also
+    --------
+
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
new file mode 100644
index 000000000000..e529c6a03969
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
@@ -0,0 +1,52 @@
+/*
+* @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 { float64ndarray } from '@stdlib/types/ndarray';
+
+/**
+* Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   a one-dimensional input ndarray.
+*     -   a one-dimensional output ndarray.
+*
+* @param arrays - array-like object containing ndarrays
+* @returns output ndarray
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+* var y = new Float64Vector( [ 2.0, 4.0, 6.0, 8.0, 10.0 ] );
+*
+* var out = dxsy( [ x, y ] );
+* // returns <ndarray>[ -1.0, -2.0, -3.0, -4.0, -5.0 ]
+*/
+declare function dxsy( arrays: [ float64ndarray, float64ndarray ] ): float64ndarray;
+
+
+// EXPORTS //
+
+export = dxsy;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/test.ts
new file mode 100644
index 000000000000..2b8e1579d6c5
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/test.ts
@@ -0,0 +1,63 @@
+/*
+* @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 dxsy = require( './index' );
+
+
+// TESTS //
+
+// The function returns an ndarray...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+	const y = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+
+	dxsy( [ x, y ] ); // $ExpectType float64ndarray
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...
+{
+	dxsy( '10' ); // $ExpectError
+	dxsy( 5 ); // $ExpectError
+	dxsy( true ); // $ExpectError
+	dxsy( false ); // $ExpectError
+	dxsy( null ); // $ExpectError
+	dxsy( undefined ); // $ExpectError
+	dxsy( [] ); // $ExpectError
+	dxsy( {} ); // $ExpectError
+	dxsy( ( x: number ): number => x ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+	const y = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+
+	dxsy(); // $ExpectError
+	dxsy( [ x, y ], {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/examples/index.js
new file mode 100644
index 000000000000..24248bd910f4
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/examples/index.js
@@ -0,0 +1,36 @@
+/**
+* @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 discreteUniform = require( '@stdlib/random/discrete-uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dxsy = require( './../lib' );
+
+var opts = {
+	'dtype': 'float64'
+};
+
+var x = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( x ) );
+
+var y = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( y ) );
+
+dxsy( [ x, y ] );
+console.log( ndarray2array( y ) );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js
new file mode 100644
index 000000000000..fc1c123f7205
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/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';
+
+/**
+* Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.
+*
+* @module @stdlib/blas/ext/base/ndarray/dxsy
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+* var dxsy = require( '@stdlib/blas/ext/base/ndarray/dxsy' );
+*
+* var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+* var y = new Float64Vector( [ 2.0, 4.0, 6.0, 8.0, 10.0 ] );
+*
+* var out = dxsy( [ x, y ] );
+* // returns <ndarray>[ -1.0, -2.0, -3.0, -4.0, -5.0 ]
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
new file mode 100644
index 000000000000..9513405dcafc
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
@@ -0,0 +1,67 @@
+/**
+* @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 numelDimension = require( '@stdlib/ndarray/base/numel-dimension' );
+var getStride = require( '@stdlib/ndarray/base/stride' );
+var getOffset = require( '@stdlib/ndarray/base/offset' );
+var getData = require( '@stdlib/ndarray/base/data-buffer' );
+var strided = require( '@stdlib/blas/ext/base/dxsy' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   a one-dimensional input ndarray.
+*     -   a one-dimensional output ndarray.
+*
+* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
+* @returns {ndarray} output ndarray
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+* var y = new Float64Vector( [ 2.0, 4.0, 6.0, 8.0, 10.0 ] );
+*
+* var out = dxsy( [ x, y ] );
+* // returns <ndarray>[ -1.0, -2.0, -3.0, -4.0, -5.0 ]
+*/
+function dxsy( arrays ) {
+	var x;
+	var y;
+
+	x = arrays[ 0 ];
+	y = arrays[ 1 ];
+	strided( numelDimension( x, 0 ), getData( x ), getStride( x, 0 ), getOffset( x ), getData( y ), getStride( y, 0 ), getOffset( y ) ); // eslint-disable-line max-len
+	return y;
+}
+
+
+// EXPORTS //
+
+module.exports = dxsy;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
new file mode 100644
index 000000000000..0537ee856fe7
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
@@ -0,0 +1,73 @@
+{
+  "name": "@stdlib/blas/ext/base/ndarray/dxsy",
+  "version": "0.0.0",
+  "description": "Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.",
+  "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",
+    "stdmath",
+    "mathematics",
+    "math",
+    "blas",
+    "extended",
+    "ext",
+    "dxsy",
+    "xsy",
+    "subtract",
+    "subtraction",
+    "difference",
+    "vector",
+    "strided",
+    "array",
+    "ndarray",
+    "float64",
+    "double",
+    "double-precision"
+  ],
+  "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/test/test.js
new file mode 100644
index 000000000000..132fede843ce
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/test/test.js
@@ -0,0 +1,234 @@
+/**
+* @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 Float64Array = require( '@stdlib/array/float64' );
+var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var dxsy = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Returns a one-dimensional ndarray.
+*
+* @private
+* @param {Float64Array} buffer - underlying data buffer
+* @param {NonNegativeInteger} length - number of indexed elements
+* @param {integer} stride - stride length
+* @param {NonNegativeInteger} offset - index offset
+* @returns {ndarray} one-dimensional ndarray
+*/
+function vector( buffer, length, stride, offset ) {
+	return new ndarray( 'float64', buffer, [ length ], [ stride ], offset, 'row-major' );
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof dxsy, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function has an arity of 1', function test( t ) {
+	t.strictEqual( dxsy.length, 1, 'has expected arity' );
+	t.end();
+});
+
+tape( 'the function subtracts `y` from `x` and assigns the results to `y`', function test( t ) {
+	var expected;
+	var actual;
+	var xbuf;
+	var ybuf;
+	var x;
+	var y;
+
+	xbuf = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0 ] );
+	ybuf = new Float64Array( [ 1.0, 2.0, -3.0, 4.0, -1.0 ] );
+	x = vector( xbuf, 5, 1, 0 );
+	y = vector( ybuf, 5, 1, 0 );
+	expected = new Float64Array([
+		-3.0, // -2.0 - 1.0
+		-1.0, // 1.0  - 2.0
+		6.0,  // 3.0  - (-3.0)
+		-9.0, // -5.0 - 4.0
+		5.0   // 4.0  - (-1.0)
+	]);
+
+	actual = dxsy( [ x, y ] );
+	t.strictEqual( actual, y, 'returns expected value' );
+	t.deepEqual( ybuf, expected, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function supports input ndarrays having non-unit strides', function test( t ) {
+	var expected;
+	var actual;
+	var xbuf;
+	var ybuf;
+	var x;
+	var y;
+
+	xbuf = new Float64Array([
+		-2.0, // 0
+		1.0,
+		3.0,  // 1
+		-5.0,
+		4.0,  // 2
+		0.0,
+		-1.0, // 3
+		-3.0
+	]);
+	ybuf = new Float64Array([
+		1.0,  // 0
+		2.0,
+		-3.0, // 1
+		4.0,
+		-1.0, // 2
+		0.0,
+		3.0,  // 3
+		2.0
+	]);
+	x = vector( xbuf, 4, 2, 0 );
+	y = vector( ybuf, 4, 2, 0 );
+	expected = new Float64Array([
+		-3.0, // -2.0 - 1.0
+		2.0,
+		6.0,  // 3.0  - (-3.0)
+		4.0,
+		5.0,  // 4.0  - (-1.0)
+		0.0,
+		-4.0, // -1.0 - 3.0
+		2.0
+	]);
+
+	actual = dxsy( [ x, y ] );
+	t.strictEqual( actual, y, 'returns expected value' );
+	t.deepEqual( ybuf, expected, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function supports input ndarrays having negative strides', function test( t ) {
+	var expected;
+	var actual;
+	var xbuf;
+	var ybuf;
+	var x;
+	var y;
+
+	xbuf = new Float64Array([
+		-2.0, // 4
+		1.0,  // 3
+		3.0,  // 2
+		-5.0, // 1
+		4.0   // 0
+	]);
+	ybuf = new Float64Array([
+		1.0,  // 4
+		2.0,  // 3
+		-3.0, // 2
+		4.0,  // 1
+		-1.0  // 0
+	]);
+	x = vector( xbuf, 5, -1, 4 );
+	y = vector( ybuf, 5, -1, 4 );
+	expected = new Float64Array([
+		-3.0, // -2.0 - 1.0
+		-1.0, // 1.0  - 2.0
+		6.0,  // 3.0  - (-3.0)
+		-9.0, // -5.0 - 4.0
+		5.0   // 4.0  - (-1.0)
+	]);
+
+	actual = dxsy( [ x, y ] );
+	t.strictEqual( actual, y, 'returns expected value' );
+	t.deepEqual( ybuf, expected, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function supports input ndarrays having non-zero offsets', function test( t ) {
+	var expected;
+	var actual;
+	var xbuf;
+	var ybuf;
+	var x;
+	var y;
+
+	xbuf = new Float64Array([
+		1.0,
+		-2.0,
+		3.0,  // 0
+		-5.0, // 1
+		4.0,  // 2
+		0.0
+	]);
+	ybuf = new Float64Array([
+		1.0,
+		-2.0,
+		0.0,  // 0
+		4.0,  // 1
+		-1.0, // 2
+		0.0
+	]);
+	x = vector( xbuf, 3, 1, 2 );
+	y = vector( ybuf, 3, 1, 2 );
+	expected = new Float64Array([
+		1.0,
+		-2.0,
+		3.0,  // 3.0  - 0.0
+		-9.0, // -5.0 - 4.0
+		5.0,  // 4.0  - (-1.0)
+		0.0
+	]);
+
+	actual = dxsy( [ x, y ] );
+	t.strictEqual( actual, y, 'returns expected value' );
+	t.deepEqual( ybuf, expected, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns the output ndarray unchanged when the input ndarrays are empty', function test( t ) {
+	var expected;
+	var actual;
+	var xbuf;
+	var ybuf;
+	var x;
+	var y;
+
+	xbuf = new Float64Array( [] );
+	ybuf = new Float64Array( [] );
+	x = vector( xbuf, 0, 1, 0 );
+	y = vector( ybuf, 0, 1, 0 );
+	expected = new Float64Array( [] );
+
+	actual = dxsy( [ x, y ] );
+	t.strictEqual( actual, y, 'returns expected value' );
+	t.deepEqual( ybuf, expected, 'returns expected value' );
+
+	t.end();
+});

From 5d9c08f66149b96c4dbbf759acd4fab8a025e148 Mon Sep 17 00:00:00 2001
From: Karan Anand <anandkarancompsci@gmail.com>
Date: Mon, 22 Jun 2026 09:52:37 -0700
Subject: [PATCH 2/3] chore: apply suggestions from review

---
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
    status: passed
  - task: lint_markdown_pkg_readmes
    status: passed
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: passed
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: passed
  - task: lint_license_headers
    status: passed
---
---
 lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md | 4 ++--
 .../@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts  | 2 +-
 .../@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js           | 2 +-
 .../@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js            | 2 +-
 4 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
index f316f528423a..6b8388d84a11 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
@@ -20,7 +20,7 @@ limitations under the License.
 
 # dxsy
 
-> Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.
+> Subtracts the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assigns the results to the output ndarray.
 
 <section class="intro">
 
@@ -50,7 +50,7 @@ var dxsy = require( '@stdlib/blas/ext/base/ndarray/dxsy' );
 
 #### dxsy( arrays )
 
-Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+Subtracts the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assigns the results to the output ndarray.
 
 ```javascript
 var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
index e529c6a03969..4bd6447eb994 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/types/index.d.ts
@@ -23,7 +23,7 @@
 import { float64ndarray } from '@stdlib/types/ndarray';
 
 /**
-* Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+* Subtracts the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assigns the results to the output ndarray.
 *
 * ## Notes
 *
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js
index fc1c123f7205..13ee3c08b549 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/index.js
@@ -19,7 +19,7 @@
 'use strict';
 
 /**
-* Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.
+* Subtract the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assign the results to the output ndarray.
 *
 * @module @stdlib/blas/ext/base/ndarray/dxsy
 *
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
index 9513405dcafc..0631f482f1af 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/lib/main.js
@@ -30,7 +30,7 @@ var strided = require( '@stdlib/blas/ext/base/dxsy' ).ndarray;
 // MAIN //
 
 /**
-* Subtracts the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assigns the results to the second ndarray.
+* Subtracts the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assigns the results to the output ndarray.
 *
 * ## Notes
 *

From bffeb8c0e469b5c5dadf205d7041b61d9872b17d Mon Sep 17 00:00:00 2001
From: Karan Anand <anandkarancompsci@gmail.com>
Date: Mon, 22 Jun 2026 10:04:43 -0700
Subject: [PATCH 3/3] chore: apply suggestions from review

---
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
    status: passed
  - task: lint_markdown_pkg_readmes
    status: passed
  - task: lint_markdown_docs
    status: na
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: passed
  - task: lint_repl_help
    status: passed
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: na
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: passed
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---
---
 .../@stdlib/blas/ext/base/ndarray/dxsy/README.md           | 2 +-
 .../@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt       | 7 ++++---
 .../@stdlib/blas/ext/base/ndarray/dxsy/package.json        | 2 +-
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
index 6b8388d84a11..d07b7cbd4252 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/README.md
@@ -20,7 +20,7 @@ limitations under the License.
 
 # dxsy
 
-> Subtracts the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assigns the results to the output ndarray.
+> Subtract the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assign the results to the output ndarray.
 
 <section class="intro">
 
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
index 7e96469642b3..cca50d9e5ea6 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/docs/repl.txt
@@ -1,8 +1,9 @@
 
 {{alias}}( arrays )
-    Subtracts the second one-dimensional double-precision floating-point ndarray
-    from the first one-dimensional double-precision floating-point ndarray and
-    assigns the results to the second ndarray.
+    Subtracts the elements of an output one-dimensional double-precision
+    floating-point ndarray from the corresponding elements in an input one-
+    dimensional double-precision floating-point ndarray and assigns the results
+    to the output ndarray.
 
     The output ndarray is modified *in-place* (i.e., the output ndarray is
     *mutated*).
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
index 0537ee856fe7..710758db485d 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dxsy/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@stdlib/blas/ext/base/ndarray/dxsy",
   "version": "0.0.0",
-  "description": "Subtract the second one-dimensional double-precision floating-point ndarray from the first one-dimensional double-precision floating-point ndarray and assign the results to the second ndarray.",
+  "description": "Subtract the elements of an output one-dimensional double-precision floating-point ndarray from the corresponding elements in an input one-dimensional double-precision floating-point ndarray and assign the results to the output ndarray.",
   "license": "Apache-2.0",
   "author": {
     "name": "The Stdlib Authors",