diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/README.md b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/README.md
new file mode 100644
index 000000000000..5d18d70d09bd
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/README.md
@@ -0,0 +1,128 @@
+
+
+# dlastIndexEqual
+
+> Return the index of the last element in a one-dimensional double-precision floating-point ndarray equal to a corresponding element in another one-dimensional double-precision floating-point ndarray.
+
+
+
+
+
+
+
+
+
+## Usage
+
+```javascript
+var dlastIndexEqual = require( '@stdlib/blas/ext/base/ndarray/dlast-index-equal' );
+```
+
+#### dlastIndexEqual( arrays )
+
+Returns the index of the last element in a one-dimensional double-precision floating-point ndarray equal to a corresponding element in another one-dimensional double-precision floating-point ndarray.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
+var y = new Float64Vector( [ 0.0, 0.0, 3.0, 0.0 ] );
+
+var idx = dlastIndexEqual( [ 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 matching elements, the function returns `-1`.
+
+```javascript
+var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+
+var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
+var y = new Float64Vector( [ 5.0, 6.0, 7.0, 8.0 ] );
+
+var idx = dlastIndexEqual( [ x, y ] );
+// returns -1
+```
+
+
+
+
+
+
+
+## Notes
+
+- When comparing elements, the function checks for equality using the strict equality operator `===`. As a consequence, `NaN` values are considered distinct, and `-0` and `+0` are considered the same.
+
+
+
+
+
+
+
+## Examples
+
+
+
+```javascript
+var discreteUniform = require( '@stdlib/random/discrete-uniform' );
+var ndarray2array = require( '@stdlib/ndarray/to-array' );
+var dlastIndexEqual = require( '@stdlib/blas/ext/base/ndarray/dlast-index-equal' );
+
+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 = dlastIndexEqual( [ x, y ] );
+console.log( idx );
+```
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/benchmark/benchmark.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/benchmark/benchmark.js
new file mode 100644
index 000000000000..67e42aa82841
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/benchmark/benchmark.js
@@ -0,0 +1,106 @@
+/**
+* @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 Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+var ones = require( '@stdlib/array/ones' );
+var zeros = require( '@stdlib/array/zeros' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var dlastIndexEqual = 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 = new Float64Vector( ones( len, options.dtype ) );
+ var y = new Float64Vector( zeros( len, 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 = dlastIndexEqual( [ 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/dlast-index-equal/docs/repl.txt b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/repl.txt
new file mode 100644
index 000000000000..daccf8d51d51
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/repl.txt
@@ -0,0 +1,32 @@
+
+{{alias}}( arrays )
+ Returns the index of the last element in a one-dimensional double-
+ precision floating-point ndarray equal to a corresponding element in
+ another one-dimensional double-precision floating-point ndarray.
+
+ When comparing elements, the function checks for equality using the strict
+ equality operator `===`. As a consequence, `NaN` values are considered
+ distinct, and `-0` and `+0` are considered the same.
+
+ Parameters
+ ----------
+ arrays: ArrayLikeObject
+ 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}}( [ 1.0, 2.0, 3.0, 4.0 ] );
+ > var y = new {{alias:@stdlib/ndarray/vector/float64}}( [ 0.0, 0.0, 3.0, 0.0 ] );
+ > {{alias}}( [ x, y ] )
+ 2
+
+ See Also
+ --------
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/types/index.d.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/types/index.d.ts
new file mode 100644
index 000000000000..16f43af9e401
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/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
+
+///
+
+import { float64ndarray } from '@stdlib/types/ndarray';
+
+/**
+* Returns the index of the last element in a one-dimensional double-precision floating-point ndarray equal to 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 for equality using the strict equality operator `===`. As a consequence, `NaN` values are considered distinct, and `-0` and `+0` are considered the same.
+*
+* @param arrays - array-like object containing ndarrays
+* @returns index
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+*
+* var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
+* var y = new Float64Vector( [ 0.0, 0.0, 3.0, 0.0 ] );
+*
+* var idx = dlastIndexEqual( [ x, y ] );
+* // returns 2
+*/
+declare function dlastIndexEqual( arrays: [ float64ndarray, float64ndarray ] ): number;
+
+
+// EXPORTS //
+
+export = dlastIndexEqual;
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/types/test.ts b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/docs/types/test.ts
new file mode 100644
index 000000000000..3acff3384626
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/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 dlastIndexEqual = require( './index' );
+
+
+// TESTS //
+
+// The function returns a number...
+{
+ const x = zeros( [ 10 ], {
+ 'dtype': 'float64'
+ });
+ const y = zeros( [ 10 ], {
+ 'dtype': 'float64'
+ });
+
+ dlastIndexEqual( [ x, y ] ); // $ExpectType number
+}
+
+// The compiler throws an error if the function is provided a first argument which is not an array of ndarrays...
+{
+ dlastIndexEqual( '10' ); // $ExpectError
+ dlastIndexEqual( 10 ); // $ExpectError
+ dlastIndexEqual( true ); // $ExpectError
+ dlastIndexEqual( false ); // $ExpectError
+ dlastIndexEqual( null ); // $ExpectError
+ dlastIndexEqual( undefined ); // $ExpectError
+ dlastIndexEqual( [] ); // $ExpectError
+ dlastIndexEqual( {} ); // $ExpectError
+ dlastIndexEqual( ( 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'
+ });
+
+ dlastIndexEqual(); // $ExpectError
+ dlastIndexEqual( [ x, y ], {} ); // $ExpectError
+}
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/examples/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/examples/index.js
new file mode 100644
index 000000000000..2ae2c228aeea
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/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 dlastIndexEqual = 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 = dlastIndexEqual( [ x, y ] );
+console.log( idx );
diff --git a/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/index.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/index.js
new file mode 100644
index 000000000000..75913d5c92ba
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/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 last element in a one-dimensional double-precision floating-point ndarray equal to a corresponding element in another one-dimensional double-precision floating-point ndarray.
+*
+* @module @stdlib/blas/ext/base/ndarray/dlast-index-equal
+*
+* @example
+* var Float64Vector = require( '@stdlib/ndarray/vector/float64' );
+* var dlastIndexEqual = require( '@stdlib/blas/ext/base/ndarray/dlast-index-equal' );
+*
+* var x = new Float64Vector( [ 1.0, 2.0, 3.0, 4.0 ] );
+* var y = new Float64Vector( [ 0.0, 0.0, 3.0, 0.0 ] );
+*
+* var idx = dlastIndexEqual( [ 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/dlast-index-equal/lib/main.js b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/lib/main.js
new file mode 100644
index 000000000000..f30003aea3f6
--- /dev/null
+++ b/lib/node_modules/@stdlib/blas/ext/base/ndarray/dlast-index-equal/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/dlast-index-equal' ).ndarray;
+
+
+// MAIN //
+
+/**
+* Returns the index of the last element in a one-dimensional double-precision floating-point ndarray equal to 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 for equality using the strict equality operator `===`. As a consequence, `NaN` values are considered distinct, and `-0` and `+0` are considered the same.
+*
+* @param {ArrayLikeObject