From c8637879fd0815871baa88f3891aad958dfac03c Mon Sep 17 00:00:00 2001
From: headlessNode <harriskhan047@outlook.com>
Date: Tue, 21 Jul 2026 12:14:54 +0500
Subject: [PATCH 1/4] feat: add blas/ext/base/ndarray/dfirst-index-less-than

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
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---
 .../ndarray/dfirst-index-less-than/README.md  | 128 ++++++++++++
 .../benchmark/benchmark.js                    | 105 ++++++++++
 .../dfirst-index-less-than/docs/repl.txt      |  33 +++
 .../docs/types/index.d.ts                     |  54 +++++
 .../dfirst-index-less-than/docs/types/test.ts |  63 ++++++
 .../dfirst-index-less-than/examples/index.js  |  35 ++++
 .../dfirst-index-less-than/lib/index.js       |  44 ++++
 .../dfirst-index-less-than/lib/main.js        |  65 ++++++
 .../dfirst-index-less-than/package.json       |  67 ++++++
 .../dfirst-index-less-than/test/test.js       | 194 ++++++++++++++++++
 10 files changed, 788 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/README.md
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/repl.txt
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/index.d.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/test.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/examples/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/test/test.js

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/README.md
new file mode 100644
index 000000000000..ffcdab1d53e5
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/README.md
@@ -0,0 +1,128 @@
+<!--
+
+@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.
+
+-->
+
+# dfirstIndexLessThan
+
+> Return the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point ndarray.
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var dfirstIndexLessThan = require( '@stdlib/blas/ext/base/ndarray/dfirst-index-less-than' );
+```
+
+#### dfirstIndexLessThan( arrays )
+
+Returns the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point ndarray.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 0.0, 0.0, 0.0, 0.0 ] );
+var y = new Float64Vector( [ 0.0, 0.0, 1.0, 0.0 ] );
+
+var idx = dfirstIndexLessThan( [ x, y ] );
+// returns 2
+```
+
+The function has the following parameters:
+
+-   **arrays**: array-like object containing the following ndarrays:
+
+    -   first one-dimensional input ndarray.
+    -   second one-dimensional input ndarray.
+
+If the function is unable to find an element in the first one-dimensional input ndarray which is less than a corresponding element in the second one-dimensional input ndarray, the function returns `-1`.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 5.0, 6.0, 7.0, 8.0 ] );
+var y = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
+
+var idx = dfirstIndexLessThan( [ x, y ] );
+// returns -1
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   When comparing elements, the function checks whether an element in the first one-dimensional input ndarray is less than a corresponding element in the second one-dimensional input ndarray using the less-than operator `<`. As a consequence, comparisons involving `NaN` always evaluate to `false`.
+
+</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 dfirstIndexLessThan = require( '@stdlib/blas/ext/base/ndarray/dfirst-index-less-than' );
+
+var opts = {
+    'dtype': 'float64'
+};
+var x = discreteUniform( [ 10 ], 0, 10, opts );
+console.log( ndarray2array( x ) );
+
+var y = discreteUniform( [ 10 ], 0, 10, opts );
+console.log( ndarray2array( y ) );
+
+var idx = dfirstIndexLessThan( [ x, y ] );
+console.log( idx );
+```
+
+</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">
+
+</section>
+
+<!-- /.links -->
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
new file mode 100644
index 000000000000..4c167587014e
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
@@ -0,0 +1,105 @@
+/**
+* @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 isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
+var pow = require( '@stdlib/math/base/special/pow' );
+var vector = require( '@stdlib/ndarray/vector/ctor' );
+var ones = require( '@stdlib/array/ones' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dfirstIndexLessThan = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+	'dtype': 'float64'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+	var x = vector( ones( len, options.dtype ), options.dtype );
+	var y = vector( ones( len, options.dtype ), options.dtype );
+	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 = dfirstIndexLessThan( [ x, y ] );
+			if ( out !== out ) {
+				b.fail( 'should return an integer' );
+			}
+		}
+		b.toc();
+		if ( !isInteger( out ) ) {
+			b.fail( 'should return an integer' );
+		}
+		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/dfirst-index-less-than/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/repl.txt
new file mode 100644
index 000000000000..e6886c7faa75
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/repl.txt
@@ -0,0 +1,33 @@
+
+{{alias}}( arrays )
+    Returns the index of the first element in a one-dimensional double-
+    precision floating-point ndarray which is less than a corresponding element
+    in another one-dimensional double-precision floating-point ndarray.
+
+    When comparing elements, the function checks whether an element in the first
+    one-dimensional input ndarray is less than a corresponding element in the
+    second one-dimensional input ndarray using the less-than operator `<`. As a
+    consequence, comparisons involving `NaN` always evaluate to `false`.
+
+    Parameters
+    ----------
+    arrays: ArrayLikeObject<ndarray>
+        Array-like object containing the following ndarrays:
+
+        - first one-dimensional input ndarray.
+        - second one-dimensional input ndarray.
+
+    Returns
+    -------
+    out: integer
+        Index.
+
+    Examples
+    --------
+    > var x = new {{alias:@stdlib/ndarray/vector/float64}}( [ 0.0, 0.0, 0.0, 0.0 ] );
+    > var y = new {{alias:@stdlib/ndarray/vector/float64}}( [ 0.0, 0.0, 1.0, 0.0 ] );
+    > {{alias}}( [ x, y ] )
+    2
+
+    See Also
+    --------
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/index.d.ts
new file mode 100644
index 000000000000..98180c960525
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/index.d.ts
@@ -0,0 +1,54 @@
+/*
+* @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';
+
+/**
+* Returns the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point ndarray.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   first one-dimensional input ndarray.
+*     -   second one-dimensional input ndarray.
+*
+* -   When comparing elements, the function checks whether an element in the first one-dimensional input ndarray is less than a corresponding element in the second one-dimensional input ndarray using the less-than operator `<`. As a consequence, comparisons involving `NaN` always evaluate to `false`.
+*
+* @param arrays - array-like object containing ndarrays
+* @returns index
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 0.0, 0.0, 0.0, 0.0 ] );
+* var y = new Float64Vector( [ 0.0, 0.0, 1.0, 0.0 ] );
+*
+* var idx = dfirstIndexLessThan( [ x, y ] );
+* // returns 2
+*/
+declare function dfirstIndexLessThan( arrays: [ float64ndarray, float64ndarray ] ): number;
+
+
+// EXPORTS //
+
+export = dfirstIndexLessThan;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/docs/types/test.ts
new file mode 100644
index 000000000000..ada378446f94
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/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 dfirstIndexLessThan = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+	const y = zeros( [ 10 ], {
+		'dtype': 'float64'
+	});
+
+	dfirstIndexLessThan( [ x, y ] ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...
+{
+	dfirstIndexLessThan( '10' ); // $ExpectError
+	dfirstIndexLessThan( 10 ); // $ExpectError
+	dfirstIndexLessThan( true ); // $ExpectError
+	dfirstIndexLessThan( false ); // $ExpectError
+	dfirstIndexLessThan( null ); // $ExpectError
+	dfirstIndexLessThan( undefined ); // $ExpectError
+	dfirstIndexLessThan( [] ); // $ExpectError
+	dfirstIndexLessThan( {} ); // $ExpectError
+	dfirstIndexLessThan( ( 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'
+	});
+
+	dfirstIndexLessThan(); // $ExpectError
+	dfirstIndexLessThan( [ x, y ], {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/examples/index.js
new file mode 100644
index 000000000000..7c3ab47e7f69
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/examples/index.js
@@ -0,0 +1,35 @@
+/**
+* @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 dfirstIndexLessThan = require( './../lib' );
+
+var opts = {
+	'dtype': 'float64'
+};
+var x = discreteUniform( [ 10 ], 0, 10, opts );
+console.log( ndarray2array( x ) );
+
+var y = discreteUniform( [ 10 ], 0, 10, opts );
+console.log( ndarray2array( y ) );
+
+var idx = dfirstIndexLessThan( [ x, y ] );
+console.log( idx );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/index.js
new file mode 100644
index 000000000000..b4fee2b37824
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/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';
+
+/**
+* Return the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point ndarray.
+*
+* @module @stdlib/blas/ext/base/ndarray/dfirst-index-less-than
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+* var dfirstIndexLessThan = require( '@stdlib/blas/ext/base/ndarray/dfirst-index-less-than' );
+*
+* var x = new Float64Vector( [ 0.0, 0.0, 0.0, 0.0 ] );
+* var y = new Float64Vector( [ 0.0, 0.0, 1.0, 0.0 ] );
+*
+* var idx = dfirstIndexLessThan( [ x, y ] );
+* // returns 2
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/main.js
new file mode 100644
index 000000000000..b203c92d4c3e
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/lib/main.js
@@ -0,0 +1,65 @@
+/**
+* @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/dfirst-index-less-than' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Returns the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point ndarray.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   first one-dimensional input ndarray.
+*     -   second one-dimensional input ndarray.
+*
+* -   When comparing elements, the function checks whether an element in the first one-dimensional input ndarray is less than a corresponding element in the second one-dimensional input ndarray using the less-than operator `<`. As a consequence, comparisons involving `NaN` always evaluate to `false`.
+*
+* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
+* @returns {integer} index
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 0.0, 0.0, 0.0, 0.0 ] );
+* var y = new Float64Vector( [ 0.0, 0.0, 1.0, 0.0 ] );
+*
+* var idx = dfirstIndexLessThan( [ x, y ] );
+* // returns 2
+*/
+function dfirstIndexLessThan( arrays ) {
+	var x = arrays[ 0 ];
+	var y = arrays[ 1 ];
+	return strided( numelDimension( x, 0 ), getData( x ), getStride( x, 0 ), getOffset( x ), getData( y ), getStride( y, 0 ), getOffset( y ) ); // eslint-disable-line max-len
+}
+
+
+// EXPORTS //
+
+module.exports = dfirstIndexLessThan;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
new file mode 100644
index 000000000000..f0b30feb2b8f
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
@@ -0,0 +1,67 @@
+{
+  "name": "@stdlib/blas/ext/base/ndarray/dfirst-index-less-than",
+  "version": "0.0.0",
+  "description": "Return the index of the first element in a one-dimensional double-precision floating-point ndarray which is less than a corresponding element in another one-dimensional double-precision floating-point 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",
+    "array",
+    "index",
+    "search",
+    "get",
+    "less",
+    "compare",
+    "ndarray"
+  ],
+  "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/test/test.js
new file mode 100644
index 000000000000..d29e09798be8
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/test/test.js
@@ -0,0 +1,194 @@
+/**
+* @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 ndarray = require( '@stdlib/ndarray/base/ctor' );
+var Float64Array = require( '@stdlib/array/float64' );
+var dfirstIndexLessThan = 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 dfirstIndexLessThan, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function returns the index of the first element in a one-dimensional ndarray which is less than a corresponding element in another one-dimensional ndarray', function test( t ) {
+	var actual;
+	var x;
+	var y;
+
+	x = vector( new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ), 6, 1, 0 );
+	y = vector( new Float64Array( [ 2.0, 2.0, 2.0, 3.0, 4.0, 5.0 ] ), 6, 1, 0 );
+
+	actual = dfirstIndexLessThan( [ x, y ] );
+	t.strictEqual( actual, 0, 'returns expected value' );
+
+	x = vector( new Float64Array( [ 2.0, 1.0, 3.0, 4.0, 5.0, 6.0 ] ), 6, 1, 0 );
+	y = vector( new Float64Array( [ 1.0, 2.0, 2.0, 3.0, 4.0, 5.0 ] ), 6, 1, 0 );
+
+	actual = dfirstIndexLessThan( [ x, y ] );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	x = vector( new Float64Array( [ 2.0, 2.0, 2.0, 4.0, 5.0, 6.0 ] ), 6, 1, 0 );
+	y = vector( new Float64Array( [ 1.0, 2.0, 3.0, 5.0, 4.0, 5.0 ] ), 6, 1, 0 );
+
+	actual = dfirstIndexLessThan( [ x, y ] );
+	t.strictEqual( actual, 2, 'returns expected value' );
+
+	x = vector( new Float64Array( [ 2.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ), 6, 1, 0 );
+	y = vector( new Float64Array( [ 1.0, 2.0, 2.0, 3.0, 4.0, 5.0 ] ), 6, 1, 0 );
+
+	actual = dfirstIndexLessThan( [ x, y ] );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function returns `-1` if unable to find an element in the first one-dimensional input ndarray which is less than a corresponding element in the second one-dimensional input ndarray', function test( t ) {
+	var actual;
+	var x;
+	var y;
+
+	x = vector( new Float64Array( [ 5.0, 6.0, 7.0, 8.0, 9.0, 10.0 ] ), 6, 1, 0 );
+	y = vector( new Float64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0 ] ), 6, 1, 0 );
+
+	actual = dfirstIndexLessThan( [ x, y ] );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+});
+
+tape( 'the function supports one-dimensional ndarrays having non-unit strides', function test( t ) {
+	var actual;
+	var x;
+	var y;
+
+	x = new Float64Array([
+		2.0,  // 0
+		2.0,
+		2.0,  // 1
+		-4.0,
+		3.0,  // 2
+		3.0,
+		5.0,  // 3
+		2.0
+	]);
+	y = new Float64Array([
+		1.0,  // 0
+		2.0,
+		1.0,  // 1
+		-4.0,
+		4.0,  // 2
+		3.0,
+		4.0,  // 3
+		2.0
+	]);
+
+	actual = dfirstIndexLessThan( [ vector( x, 4, 2, 0 ), vector( y, 4, 2, 0 ) ] );
+
+	t.strictEqual( actual, 2, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function supports one-dimensional ndarrays having negative strides', function test( t ) {
+	var actual;
+	var x;
+	var y;
+
+	x = new Float64Array([
+		1.0,  // 3
+		2.0,
+		2.0,  // 2
+		-2.0,
+		3.0,  // 1
+		4.0,
+		5.0,  // 0
+		2.0
+	]);
+	y = new Float64Array([
+		4.0,  // 3
+		2.0,
+		3.0,  // 2
+		-2.0,
+		4.0,  // 1
+		4.0,
+		4.0,  // 0
+		2.0
+	]);
+
+	actual = dfirstIndexLessThan( [ vector( x, 4, -2, 6 ), vector( y, 4, -2, 6 ) ] );
+
+	t.strictEqual( actual, 1, 'returns expected value' );
+	t.end();
+});
+
+tape( 'the function supports one-dimensional ndarrays having non-zero offsets', function test( t ) {
+	var actual;
+	var x;
+	var y;
+
+	x = new Float64Array([
+		2.0,
+		1.0,  // 0
+		2.0,
+		2.0,  // 1
+		-2.0,
+		3.0,  // 2
+		3.0,
+		4.0   // 3
+	]);
+	y = new Float64Array([
+		2.0,
+		2.0,  // 0
+		2.0,
+		3.0,  // 1
+		-2.0,
+		2.0,  // 2
+		3.0,
+		5.0   // 3
+	]);
+
+	actual = dfirstIndexLessThan( [ vector( x, 4, 2, 1 ), vector( y, 4, 2, 1 ) ] );
+	t.strictEqual( actual, 0, 'returns expected value' );
+
+	t.end();
+});

From 5ab9a0d7cd66e99128a6b5064f1aa76563b3069e Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Tue, 21 Jul 2026 14:29:55 -0700
Subject: [PATCH 2/4] Apply suggestions from code review

Co-authored-by: Athan <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>
---
 .../ndarray/dfirst-index-less-than/benchmark/benchmark.js   | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
index 4c167587014e..c810a395d105 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
@@ -23,7 +23,7 @@
 var bench = require( '@stdlib/bench' );
 var isInteger = require( '@stdlib/assert/is-integer' ).isPrimitive;
 var pow = require( '@stdlib/math/base/special/pow' );
-var vector = require( '@stdlib/ndarray/vector/ctor' );
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
 var ones = require( '@stdlib/array/ones' );
 var format = require( '@stdlib/string/format' );
 var pkg = require( './../package.json' ).name;
@@ -47,8 +47,8 @@ var options = {
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = vector( ones( len, options.dtype ), options.dtype );
-	var y = vector( ones( len, options.dtype ), options.dtype );
+	var x = Float64Vector( ones( len, options.dtype ) );
+	var y = Float64Vector( ones( len, options.dtype ) );
 	return benchmark;
 
 	/**

From 9051478e9bd414d2cf10355bb657d70f74108104 Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Tue, 21 Jul 2026 14:34:36 -0700
Subject: [PATCH 3/4] Apply suggestions from code review

Co-authored-by: Athan <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>
---
 .../blas/ext/base/ndarray/dfirst-index-less-than/package.json   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
index f0b30feb2b8f..bae2b524a0de 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/package.json
@@ -58,7 +58,7 @@
     "array",
     "index",
     "search",
-    "get",
+    "find",
     "less",
     "compare",
     "ndarray"

From e4c94547e4434a689115efa95c9e721581f9122f Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Tue, 21 Jul 2026 14:50:59 -0700
Subject: [PATCH 4/4] Apply suggestions from code review

Co-authored-by: Athan <kgryte@gmail.com>
Signed-off-by: Athan <kgryte@gmail.com>
---
 .../ndarray/dfirst-index-less-than/benchmark/benchmark.js     | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
index c810a395d105..176490c3079e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dfirst-index-less-than/benchmark/benchmark.js
@@ -47,8 +47,8 @@ var options = {
 * @returns {Function} benchmark function
 */
 function createBenchmark( len ) {
-	var x = Float64Vector( ones( len, options.dtype ) );
-	var y = Float64Vector( ones( len, options.dtype ) );
+	var x = new Float64Vector( ones( len, options.dtype ) );
+	var y = new Float64Vector( ones( len, options.dtype ) );
 	return benchmark;
 
 	/**