From 6db7e37bf333f1c9f3364e4cdd3273881e234bbe Mon Sep 17 00:00:00 2001
From: headlessNode <harriskhan047@outlook.com>
Date: Tue, 25 Aug 2026 16:29:54 +0500
Subject: [PATCH 1/3] feat: add blas/ext/base/ndarray/gfind-index-between

---
 .../ndarray/gfind-index-between/README.md     | 207 +++++++
 .../benchmark/benchmark.js                    | 125 +++++
 .../ndarray/gfind-index-between/docs/repl.txt |  56 ++
 .../gfind-index-between/docs/types/index.d.ts | 113 ++++
 .../gfind-index-between/docs/types/test.ts    | 122 ++++
 .../gfind-index-between/examples/index.js     |  46 ++
 .../ndarray/gfind-index-between/lib/index.js  |  56 ++
 .../ndarray/gfind-index-between/lib/main.js   | 120 ++++
 .../ndarray/gfind-index-between/package.json  |  67 +++
 .../ndarray/gfind-index-between/test/test.js  | 526 ++++++++++++++++++
 10 files changed, 1438 insertions(+)
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/benchmark/benchmark.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/repl.txt
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/index.d.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/test.ts
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/examples/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/index.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/main.js
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
 create mode 100644 lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/test/test.js

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
new file mode 100644
index 000000000000..a85e04c77829
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
@@ -0,0 +1,207 @@
+<!--
+
+@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.
+
+-->
+
+# gfindIndexBetween
+
+> Return the index of the first element in a one-dimensional ndarray which passes a test implemented by a predicate function within a specified range.
+
+<section class="intro">
+
+</section>
+
+<!-- /.intro -->
+
+<section class="usage">
+
+## Usage
+
+```javascript
+var gfindIndexBetween = require( '@stdlib/blas/ext/base/ndarray/gfind-index-between' );
+```
+
+#### gfindIndexBetween( arrays, clbk\[, thisArg] )
+
+Returns the index of the first element in a one-dimensional ndarray which passes a test implemented by a predicate function within a specified range.
+
+```javascript
+var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var vector = require( '@stdlib/ndarray/vector/ctor' );
+
+function isEven( v ) {
+    return v % 2.0 === 0.0;
+}
+
+var x = vector( [ 2.0, 1.0, 3.0, 4.0, 5.0 ], 'generic' );
+
+var fromIndex = scalar2ndarray( 1, {
+    'dtype': 'generic'
+});
+
+var toIndex = scalar2ndarray( 4, {
+    'dtype': 'generic'
+});
+
+var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+// returns 3
+```
+
+If no element passes a test implemented by a predicate function, the function returns `-1`.
+
+```javascript
+var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var vector = require( '@stdlib/ndarray/vector/ctor' );
+
+function isEven( v ) {
+    return v % 2.0 === 0.0;
+}
+
+var x = vector( [ 2.0, 1.0, 3.0, 5.0, 7.0 ], 'generic' );
+
+var fromIndex = scalar2ndarray( 1, {
+    'dtype': 'generic'
+});
+
+var toIndex = scalar2ndarray( 4, {
+    'dtype': 'generic'
+});
+
+var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+// returns -1
+```
+
+The function has the following parameters:
+
+-   **arrays**: array-like object containing the following ndarrays:
+
+    -   a one-dimensional input ndarray.
+    -   a zero-dimensional ndarray containing the index from which to begin searching.
+    -   a zero-dimensional ndarray containing the index at which to stop searching (exclusive).
+
+-   **clbk**: callback function.
+
+-   **thisArg**: callback execution context (_optional_).
+
+The callback function is provided the following arguments:
+
+-   **value**: current array element.
+-   **idx**: current array element index.
+-   **array**: the input ndarray.
+
+To set the callback execution context, provide a `thisArg`.
+
+```javascript
+var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var vector = require( '@stdlib/ndarray/vector/ctor' );
+
+function isEven( v ) {
+    this.count += 1;
+    return v % 2.0 === 0.0;
+}
+
+var x = vector( [ 2.0, 1.0, 3.0, 4.0, 5.0 ], 'generic' );
+var ctx = {
+    'count': 0
+};
+
+var fromIndex = scalar2ndarray( 1, {
+    'dtype': 'generic'
+});
+
+var toIndex = scalar2ndarray( 4, {
+    'dtype': 'generic'
+});
+
+var v = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven, ctx );
+// returns 3
+
+var count = ctx.count;
+// returns 3
+```
+
+</section>
+
+<!-- /.usage -->
+
+<section class="notes">
+
+## Notes
+
+-   If provided an empty one-dimensional ndarray, the function returns `-1`.
+-   If a specified starting search index is negative, the function resolves the starting search index by counting backward from the last element (where `-1` refers to the last element).
+-   If a specified ending search index is negative, the function resolves the ending search index by counting backward from the last element (where `-1` refers to the last element).
+
+</section>
+
+<!-- /.notes -->
+
+<section class="examples">
+
+## Examples
+
+<!-- eslint no-undef: "error" -->
+
+```javascript
+var discreteUniform = require( '@stdlib/random/discrete-uniform' );
+var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var gfindIndexBetween = require( '@stdlib/blas/ext/base/ndarray/gfind-index-between' );
+
+function isEven( v ) {
+    return v % 2.0 === 0.0;
+}
+
+var opts = {
+    'dtype': 'generic'
+};
+
+var x = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( x ) );
+
+var fromIndex = scalar2ndarray( 2, {
+    'dtype': 'generic'
+});
+
+var toIndex = scalar2ndarray( 8, {
+    'dtype': 'generic'
+});
+
+var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+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/gfind-index-between/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/benchmark/benchmark.js
new file mode 100644
index 000000000000..a4d321dc6edf
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/benchmark/benchmark.js
@@ -0,0 +1,125 @@
+/**
+* @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 scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var isnan = require( '@stdlib/math/base/assert/is-nan' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var gfindIndexBetween = require( './../lib' );
+
+
+// VARIABLES //
+
+var options = {
+	'dtype': 'generic'
+};
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {number} v - array element
+* @returns {boolean} result
+*/
+function clbk( v ) {
+	return v < 0.0;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+	var fromIndex;
+	var toIndex;
+	var x;
+
+	x = uniform( [ len ], 0.0, 100.0, options );
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( len, {
+		'dtype': 'generic'
+	});
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var v;
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			v = gfindIndexBetween( [ x, fromIndex, toIndex ], clbk );
+			if ( isnan( v ) ) {
+				b.fail( 'should not return NaN' );
+			}
+		}
+		b.toc();
+		if ( isnan( v ) ) {
+			b.fail( 'should not return NaN' );
+		}
+		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/gfind-index-between/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/repl.txt
new file mode 100644
index 000000000000..cd8a6bd02a5f
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/repl.txt
@@ -0,0 +1,56 @@
+
+{{alias}}( arrays, clbk[, thisArg] )
+    Returns the index of the first element in a one-dimensional ndarray which
+    passes a test implemented by a predicate function within a specified range.
+
+    If a specified starting search index is negative, the function resolves the
+    starting search index by counting backward from the last element (where `-1`
+    refers to the last element).
+
+    If a specified ending search index is negative, the function resolves the
+    ending search index by counting backward from the last element (where `-1`
+    refers to the last element).
+
+    If provided an empty ndarray or no element passes a test implemented by a
+    predicate function, the function returns `-1`.
+
+    The callback function is provided three arguments:
+
+    - value: current array element.
+    - index: current array index.
+    - array: the input ndarray.
+
+    Parameters
+    ----------
+    arrays: ArrayLikeObject<ndarray>
+        Array-like object containing the following ndarrays:
+
+        - a one-dimensional input ndarray.
+        - a zero-dimensional ndarray containing the index from which to begin
+        searching.
+        - a zero-dimensional ndarray containing the index at which to stop
+        searching (exclusive).
+
+    clbk: Function
+        Callback function.
+
+    thisArg: any (optional)
+        Callback execution context.
+
+    Returns
+    -------
+    out: integer
+        Index.
+
+    Examples
+    --------
+    > var x = {{alias:@stdlib/ndarray/vector/ctor}}( [ -2.0, 1.0, 3.0, 4.0 ], 'generic' );
+    > var i = {{alias:@stdlib/ndarray/from-scalar}}( 1, { 'dtype': 'generic' } );
+    > var j = {{alias:@stdlib/ndarray/from-scalar}}( 4, { 'dtype': 'generic' } );
+    > function f ( v ) { return v % 2.0 === 0.0; };
+    > {{alias}}( [ x, i, j ], f )
+    3
+
+    See Also
+    --------
+
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/index.d.ts
new file mode 100644
index 000000000000..d6d7561252c8
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/index.d.ts
@@ -0,0 +1,113 @@
+/*
+* @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 { typedndarray } from '@stdlib/types/ndarray';
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @returns boolean indicating whether an element passes a test
+*/
+type Nullary<ThisArg> = ( this: ThisArg ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @returns boolean indicating whether an element passes a test
+*/
+type Unary<T, ThisArg> = ( this: ThisArg, value: T ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @returns boolean indicating whether an element passes a test
+*/
+type Binary<T, ThisArg> = ( this: ThisArg, value: T, index: number ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param array - input ndarray
+* @returns boolean indicating whether an element passes a test
+*/
+type Ternary<T, U, ThisArg> = ( this: ThisArg, value: T, index: number, array: U ) => boolean;
+
+/**
+* Returns a boolean indicating whether an element passes a test.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param array - input ndarray
+* @returns boolean indicating whether an element passes a test
+*/
+type Predicate<T, U, ThisArg> = Nullary<ThisArg> | Unary<T, ThisArg> | Binary<T, ThisArg> | Ternary<T, U, ThisArg>;
+
+/**
+* Returns the index of the first element in a one-dimensional ndarray which passes a test implemented by a predicate function within a specified range.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   a one-dimensional input ndarray.
+*     -   a zero-dimensional ndarray containing the index from which to begin searching.
+*     -   a zero-dimensional ndarray containing the index at which to stop searching (exclusive).
+*
+* -   If no element passes a test implemented by a predicate function, the function returns `-1`.
+*
+* @param arrays - array-like object containing ndarrays
+* @param clbk - predicate function
+* @param thisArg - predicate function execution context
+* @returns index
+*
+* @example
+* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+* var vector = require( '@stdlib/ndarray/vector/ctor' );
+*
+* function clbk( v ) {
+*     return v % 2.0 === 0.0;
+* }
+*
+* var x = vector( [ 2.0, 1.0, 3.0, 4.0, 5.0 ], 'generic' );
+*
+* var fromIndex = scalar2ndarray( 1, {
+*     'dtype': 'generic'
+* });
+*
+* var toIndex = scalar2ndarray( 4, {
+*     'dtype': 'generic'
+* });
+*
+* var v = gfindIndexBetween( [ x, fromIndex, toIndex ], clbk );
+* // returns 3
+*/
+declare function gfindIndexBetween<T = unknown, U extends typedndarray<T> = typedndarray<T>, ThisArg = unknown>( arrays: [ U, typedndarray<number>, typedndarray<number> ], clbk: Predicate<T, U, ThisArg>, thisArg?: ThisParameterType<Predicate<T, U, ThisArg>> ): number;
+
+
+// EXPORTS //
+
+export = gfindIndexBetween;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/test.ts
new file mode 100644
index 000000000000..60450d992896
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/docs/types/test.ts
@@ -0,0 +1,122 @@
+/*
+* @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 scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+import gfindIndexBetween = require( './index' );
+
+/**
+* Callback function.
+*
+* @param value - ndarray element
+* @returns result
+*/
+function clbk( value: any ): boolean {
+	return value % 2.0 === 0.0;
+}
+
+
+// TESTS //
+
+// The function returns a number...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'generic'
+	});
+	const fromIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	const toIndex = scalar2ndarray( 8, {
+		'dtype': 'generic'
+	});
+
+	gfindIndexBetween( [ x, fromIndex, toIndex ], clbk ); // $ExpectType number
+	gfindIndexBetween( [ x, fromIndex, toIndex ], clbk, {} ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...
+{
+	gfindIndexBetween( '10', clbk ); // $ExpectError
+	gfindIndexBetween( 10, clbk ); // $ExpectError
+	gfindIndexBetween( true, clbk ); // $ExpectError
+	gfindIndexBetween( false, clbk ); // $ExpectError
+	gfindIndexBetween( null, clbk ); // $ExpectError
+	gfindIndexBetween( undefined, clbk ); // $ExpectError
+	gfindIndexBetween( [], clbk ); // $ExpectError
+	gfindIndexBetween( {}, clbk ); // $ExpectError
+	gfindIndexBetween( ( x: number ): number => x, clbk ); // $ExpectError
+
+	gfindIndexBetween( '10', clbk, {} ); // $ExpectError
+	gfindIndexBetween( 10, clbk, {} ); // $ExpectError
+	gfindIndexBetween( true, clbk, {} ); // $ExpectError
+	gfindIndexBetween( false, clbk, {} ); // $ExpectError
+	gfindIndexBetween( null, clbk, {} ); // $ExpectError
+	gfindIndexBetween( undefined, clbk, {} ); // $ExpectError
+	gfindIndexBetween( [], clbk, {} ); // $ExpectError
+	gfindIndexBetween( {}, clbk, {} ); // $ExpectError
+	gfindIndexBetween( ( x: number ): number => x, clbk, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided a second argument which is not a callback function...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'generic'
+	});
+	const fromIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	const toIndex = scalar2ndarray( 8, {
+		'dtype': 'generic'
+	});
+
+	gfindIndexBetween( [ x, fromIndex, toIndex ], '10' ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], 10 ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], true ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], false ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], null ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], undefined ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], [] ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], {} ); // $ExpectError
+
+	gfindIndexBetween( [ x, fromIndex, toIndex ], '10', {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], 10, {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], true, {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], false, {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], null, {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], undefined, {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], [], {} ); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], {}, {} ); // $ExpectError
+}
+
+// The compiler throws an error if the function is provided an unsupported number of arguments...
+{
+	const x = zeros( [ 10 ], {
+		'dtype': 'generic'
+	});
+	const fromIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	const toIndex = scalar2ndarray( 8, {
+		'dtype': 'generic'
+	});
+
+	gfindIndexBetween(); // $ExpectError
+	gfindIndexBetween( [ x, fromIndex, toIndex ], clbk, {}, {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/examples/index.js
new file mode 100644
index 000000000000..f0e5152d5459
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/examples/index.js
@@ -0,0 +1,46 @@
+/**
+* @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 scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var gfindIndexBetween = require( './../lib' );
+
+function isEven( v ) {
+	return v % 2.0 === 0.0;
+}
+
+var opts = {
+	'dtype': 'generic'
+};
+
+var x = discreteUniform( [ 10 ], -100, 100, opts );
+console.log( ndarray2array( x ) );
+
+var fromIndex = scalar2ndarray( 2, {
+	'dtype': 'generic'
+});
+
+var toIndex = scalar2ndarray( 8, {
+	'dtype': 'generic'
+});
+
+var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+console.log( idx );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/index.js
new file mode 100644
index 000000000000..f31d299ce6a9
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/index.js
@@ -0,0 +1,56 @@
+/**
+* @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 ndarray which passes a test implemented by a predicate function within a specified range.
+*
+* @module @stdlib/blas/ext/base/ndarray/gfind-index-between
+*
+* @example
+* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+* var vector = require( '@stdlib/ndarray/vector/ctor' );
+* var gfindIndexBetween = require( '@stdlib/blas/ext/base/ndarray/gfind-index-between' );
+*
+* function clbk( v ) {
+*     return v % 2.0 === 0.0;
+* }
+*
+* var x = vector( [ 2.0, 1.0, 3.0, 4.0, 5.0 ], 'generic' );
+*
+* var fromIndex = scalar2ndarray( 1, {
+*     'dtype': 'generic'
+* });
+*
+* var toIndex = scalar2ndarray( 4, {
+*     'dtype': 'generic'
+* });
+*
+* var v = gfindIndexBetween( [ x, fromIndex, toIndex ], clbk );
+* // returns 3
+*/
+
+// MODULES //
+
+var main = require( './main.js' );
+
+
+// EXPORTS //
+
+module.exports = main;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/main.js
new file mode 100644
index 000000000000..a9e140c1f7bc
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/lib/main.js
@@ -0,0 +1,120 @@
+/**
+* @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 ndarraylike2scalar = require( '@stdlib/ndarray/base/ndarraylike2scalar' );
+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 clipIndex = require( '@stdlib/ndarray/base/clip-index' );
+var strided = require( '@stdlib/blas/ext/base/gfind-index' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Returns the index of the first element in a one-dimensional ndarray which passes a test implemented by a predicate function within a specified range.
+*
+* ## Notes
+*
+* -   The function expects the following ndarrays:
+*
+*     -   a one-dimensional input ndarray.
+*     -   a zero-dimensional ndarray containing the index from which to begin searching.
+*     -   a zero-dimensional ndarray containing the index at which to stop searching (exclusive).
+*
+* @param {ArrayLikeObject<Object>} arrays - array-like object containing ndarrays
+* @param {Function} clbk - callback function
+* @param {*} [thisArg] - callback execution context
+* @returns {integer} index
+*
+* @example
+* var scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+* var vector = require( '@stdlib/ndarray/vector/ctor' );
+*
+* function clbk( v ) {
+*     return v % 2.0 === 0.0;
+* }
+*
+* var x = vector( [ 2.0, 1.0, 3.0, 4.0, 5.0 ], 'generic' );
+*
+* var fromIndex = scalar2ndarray( 1, {
+*     'dtype': 'generic'
+* });
+*
+* var toIndex = scalar2ndarray( 4, {
+*     'dtype': 'generic'
+* });
+*
+* var v = gfindIndexBetween( [ x, fromIndex, toIndex ], clbk );
+* // returns 3
+*/
+function gfindIndexBetween( arrays, clbk, thisArg ) {
+	var fromIndex;
+	var toIndex;
+	var stride;
+	var offset;
+	var idx;
+	var N;
+	var n;
+	var x;
+
+	x = arrays[ 0 ];
+	fromIndex = ndarraylike2scalar( arrays[ 1 ] );
+	toIndex = ndarraylike2scalar( arrays[ 2 ] );
+
+	N = numelDimension( x, 0 );
+	fromIndex = clipIndex( fromIndex, N );
+	toIndex = clipIndex( toIndex, N );
+
+	n = toIndex - fromIndex;
+	if ( n <= 0 ) {
+		return -1;
+	}
+	stride = getStride( x, 0 );
+	offset = getOffset( x ) + ( stride*fromIndex );
+
+	idx = strided( n, getData( x ), stride, offset, wrapper, null );
+	if ( idx >= 0 ) {
+		idx += fromIndex;
+	}
+	return idx;
+
+	/**
+	* Invokes a provided callback.
+	*
+	* @private
+	* @param {*} value - current array element
+	* @param {NonNegativeInteger} aidx - current array element index
+	* @param {NonNegativeInteger} sidx - current strided array element index
+	* @param {Collection} arr - input array
+	* @returns {*} result
+	*/
+	function wrapper( value, aidx ) {
+		return clbk.call( thisArg, value, aidx + fromIndex, x );
+	}
+}
+
+
+// EXPORTS //
+
+module.exports = gfindIndexBetween;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
new file mode 100644
index 000000000000..8b67b110abb5
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
@@ -0,0 +1,67 @@
+{
+  "name": "@stdlib/blas/ext/base/ndarray/gfind-index-between",
+  "version": "0.0.0",
+  "description": "Return the index of the first element in a one-dimensional ndarray which passes a test implemented by a predicate function within a specified range.",
+  "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",
+    "find",
+    "index",
+    "between",
+    "search",
+    "get",
+    "ndarray"
+  ],
+  "__stdlib__": {}
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/test/test.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/test/test.js
new file mode 100644
index 000000000000..3d44db7a3941
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/test/test.js
@@ -0,0 +1,526 @@
+/**
+* @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 scalar2ndarray = require( '@stdlib/ndarray/from-scalar' );
+var ndarray = require( '@stdlib/ndarray/base/ctor' );
+var gfindIndexBetween = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Returns a one-dimensional ndarray.
+*
+* @private
+* @param {Collection} 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( 'generic', buffer, [ length ], [ stride ], offset, 'row-major' );
+}
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof gfindIndexBetween, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'the function returns the index of the first element which passes a test implemented by a predicate function within a specified range', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = [ 2.0, 1.0, 3.0, 4.0, 5.0 ];
+	fromIndex = scalar2ndarray( 1, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ vector( x, 5, 1, 0 ), fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 3, 'returns expected value' );
+
+	x = [ 1.0, 4.0, 5.0, 6.0, 3.0 ];
+	fromIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ vector( x, 5, 1, 0 ), fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 3, 'returns expected value' );
+
+	x = [ 2.0, 1.0, 3.0, 5.0, 4.0 ];
+	fromIndex = scalar2ndarray( 1, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ vector( x, 5, 1, 0 ), fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports a `fromIndex` parameter (nonnegative)', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ], 6, 1, 0 );
+	toIndex = scalar2ndarray( 6, {
+		'dtype': 'generic'
+	});
+
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( 1, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 3, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( 5, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 5, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports a `fromIndex` parameter (negative)', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 0.0, 1.0, 0.0, 1.0, 0.0, 1.0 ], 6, 1, 0 );
+	toIndex = scalar2ndarray( 6, {
+		'dtype': 'generic'
+	});
+
+	fromIndex = scalar2ndarray( -1, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( -2, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 4, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( -3, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 4, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( -7, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 0, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports a `toIndex` parameter (nonnegative)', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ], 6, 1, 0 );
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+
+	toIndex = scalar2ndarray( 6, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( 2, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( 1, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports a `toIndex` parameter (negative)', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ], 6, 1, 0 );
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+
+	toIndex = scalar2ndarray( -1, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( -4, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( -5, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	toIndex = scalar2ndarray( -7, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function returns `-1` if provided an empty input ndarray', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [], 0, 1, 0 );
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function returns `-1` if provided a starting search index which is greater than or equal to the ending search index', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ], 6, 1, 0 );
+
+	fromIndex = scalar2ndarray( 3, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 3, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 3, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function returns `-1` if provided a starting search index which is greater than or equal to number of elements in the input ndarray', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = vector( [ 1.0, 0.0, 1.0, 0.0, 1.0, 0.0 ], 6, 1, 0 );
+
+	fromIndex = scalar2ndarray( 6, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 6, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	fromIndex = scalar2ndarray( 7, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 7, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, -1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports one-dimensional ndarrays having non-unit strides', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = [
+		1.0,  // 0
+		2.0,
+		3.0,  // 1
+		-4.0,
+		-5.0, // 2
+		3.0,
+		4.0,  // 3
+		2.0
+	];
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+
+	actual = gfindIndexBetween( [ vector( x, 4, 2, 0 ), fromIndex, toIndex ], isEven );
+
+	t.strictEqual( actual, 3, 'returns expected value' );
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports one-dimensional ndarrays having negative strides', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = [
+		1.0,  // 3
+		2.0,
+		2.0,  // 2
+		-2.0,
+		-7.0, // 1
+		4.0,
+		3.0,  // 0
+		2.0
+	];
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+
+	actual = gfindIndexBetween( [ vector( x, 4, -2, 6 ), fromIndex, toIndex ], isEven );
+
+	t.strictEqual( actual, 2, 'returns expected value' );
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports one-dimensional ndarrays having non-zero offsets', function test( t ) {
+	var fromIndex;
+	var toIndex;
+	var actual;
+	var x;
+
+	x = [
+		2.0,
+		1.0,  // 0
+		2.0,
+		-2.0, // 1
+		-2.0,
+		2.0,  // 2
+		3.0,
+		4.0   // 3
+	];
+	fromIndex = scalar2ndarray( 0, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+
+	actual = gfindIndexBetween( [ vector( x, 4, 2, 1 ), fromIndex, toIndex ], isEven );
+	t.strictEqual( actual, 1, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v ) {
+		return v % 2.0 === 0.0;
+	}
+});
+
+tape( 'the function supports providing an execution context', function test( t ) {
+	var fromIndex;
+	var expected;
+	var toIndex;
+	var indices;
+	var values;
+	var arrays;
+	var actual;
+	var ctx;
+	var arr;
+	var x;
+
+	x = [
+		1.0,  // 0
+		2.0,
+		3.0,  // 1
+		-2.0,
+		-7.0, // 2
+		3.0,
+		4.0,  // 3
+		2.0
+	];
+	ctx = {
+		'count': 0
+	};
+
+	indices = [];
+	values = [];
+	arrays = [];
+
+	arr = vector( x, 4, 2, 0 );
+	fromIndex = scalar2ndarray( 1, {
+		'dtype': 'generic'
+	});
+	toIndex = scalar2ndarray( 4, {
+		'dtype': 'generic'
+	});
+	actual = gfindIndexBetween( [ arr, fromIndex, toIndex ], isEven, ctx );
+
+	t.strictEqual( actual, 3, 'returns expected value' );
+	t.strictEqual( ctx.count, 3, 'returns expected value' );
+
+	expected = [
+		3.0,
+		-7.0,
+		4.0
+	];
+	t.deepEqual( values, expected, 'returns expected value' );
+
+	expected = [
+		1,
+		2,
+		3
+	];
+	t.deepEqual( indices, expected, 'returns expected value' );
+
+	expected = [
+		arr,
+		arr,
+		arr
+	];
+	t.deepEqual( arrays, expected, 'returns expected value' );
+
+	t.end();
+
+	function isEven( v, idx, arr ) {
+		this.count += 1; // eslint-disable-line no-invalid-this
+		values.push( v );
+		indices.push( idx );
+		arrays.push( arr );
+		return v % 2.0 === 0.0;
+	}
+});

From 206d466d22ca6ebe73c786c42b3a105111efd211 Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Mon, 28 Sep 2026 19:38:46 -0700
Subject: [PATCH 2/3] docs: reorder content

Signed-off-by: Athan <kgryte@gmail.com>
---
 .../ndarray/gfind-index-between/README.md     | 36 +++++++++----------
 1 file changed, 18 insertions(+), 18 deletions(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
index a85e04c77829..4cd11a072c9e 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/README.md
@@ -62,6 +62,24 @@ var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
 // returns 3
 ```
 
+The function has the following parameters:
+
+-   **arrays**: array-like object containing the following ndarrays:
+
+    -   a one-dimensional input ndarray.
+    -   a zero-dimensional ndarray containing the index from which to begin searching.
+    -   a zero-dimensional ndarray containing the index at which to stop searching (exclusive).
+
+-   **clbk**: callback function.
+
+-   **thisArg**: callback execution context (_optional_).
+
+The callback function is provided the following arguments:
+
+-   **value**: current array element.
+-   **idx**: current array element index.
+-   **array**: the input ndarray.
+
 If no element passes a test implemented by a predicate function, the function returns `-1`.
 
 ```javascript
@@ -86,24 +104,6 @@ var idx = gfindIndexBetween( [ x, fromIndex, toIndex ], isEven );
 // returns -1
 ```
 
-The function has the following parameters:
-
--   **arrays**: array-like object containing the following ndarrays:
-
-    -   a one-dimensional input ndarray.
-    -   a zero-dimensional ndarray containing the index from which to begin searching.
-    -   a zero-dimensional ndarray containing the index at which to stop searching (exclusive).
-
--   **clbk**: callback function.
-
--   **thisArg**: callback execution context (_optional_).
-
-The callback function is provided the following arguments:
-
--   **value**: current array element.
--   **idx**: current array element index.
--   **array**: the input ndarray.
-
 To set the callback execution context, provide a `thisArg`.
 
 ```javascript

From dbd1768d99b993d956ab7097becc4e30058118de Mon Sep 17 00:00:00 2001
From: Athan <kgryte@gmail.com>
Date: Mon, 28 Sep 2026 19:39:26 -0700
Subject: [PATCH 3/3] chore: remove keyword

Signed-off-by: Athan <kgryte@gmail.com>
---
 .../blas/ext/base/ndarray/gfind-index-between/package.json       | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
index 8b67b110abb5..360edb838ac3 100644
--- a/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/gfind-index-between/package.json
@@ -60,7 +60,6 @@
     "index",
     "between",
     "search",
-    "get",
     "ndarray"
   ],
   "__stdlib__": {}