feat: add map method for array/uint64

lib/node_modules/@stdlib/array/uint64/README.md

@@ -335,6 +335,54 @@ var u = arr.get( 100 );
 // returns undefined
 ```
 
+<a name="method-map"></a>
+
+#### Uint64Array.prototype.map( callbackFn\[, thisArg] )
+
+Returns a new array with each element being the result of a provided callback function.
+
+```javascript
+var add = require( '@stdlib/number/uint64/base/add' );
+
+function scale( v ) {
+    return add( v, v );
+}
+
+var arr = new Uint64Array( [ 1, 2, 3 ] );
+
+var out = arr.map( scale );
+// returns <Uint64Array>[ 2n, 4n, 6n ]
+```
+
+The callback function is provided three arguments:
+
+-   **value**: current array element.
+-   **index**: current array element index.
+-   **arr**: the array on which this method was called.
+
+To set the function execution context, provide a `thisArg`.
+
+```javascript
+var add = require( '@stdlib/number/uint64/base/add' );
+
+function scale( v ) {
+    this.count += 1;
+    return add( v, v );
+}
+
+var arr = new Uint64Array( [ 1, 2, 3 ] );
+
+var context = {
+    'count': 0
+};
+
+var out = arr.map( scale, context );
+// returns <Uint64Array>[ 2n, 4n, 6n ]
+
+var count = context.count;
+// returns 3
+```
+
 <a name="method-set"></a>
 
 #### Uint64Array.prototype.set( value\[, i] )

lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.map.js

@@ -0,0 +1,84 @@
+/**
+* @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 isUint64Array = require( '@stdlib/assert/is-uint64array' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( format( '%s:map', pkg ), function benchmark( b ) {
+	var arr;
+	var out;
+	var i;
+
+	arr = new Uint64Array( 10 );
+
+	// Benchmark worst case scenario (i.e., every element is visited and written to the output array)...
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = arr.map( fcn );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isUint64Array( out ) ) {
+		b.fail( 'should return a Uint64Array' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+
+	function fcn( v ) {
+		return v;
+	}
+});
+
+bench( format( '%s::this_context:map', pkg ), function benchmark( b ) {
+	var arr;
+	var out;
+	var i;
+
+	arr = new Uint64Array( 10 );
+
+	// Benchmark worst case scenario (i.e., every element is visited and written to the output array)...
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = arr.map( fcn, {} );
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isUint64Array( out ) ) {
+		b.fail( 'should return a Uint64Array' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+
+	function fcn( v ) {
+		return v;
+	}
+});

lib/node_modules/@stdlib/array/uint64/benchmark/benchmark.map.length.js

@@ -0,0 +1,107 @@
+/**
+* @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 pow = require( '@stdlib/math/base/special/pow' );
+var isUint64Array = require( '@stdlib/assert/is-uint64array' );
+var format = require( '@stdlib/string/format' );
+var pkg = require( './../package.json' ).name;
+var Uint64Array = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Callback function.
+*
+* @private
+* @param {Uint64} value - array element
+* @returns {Uint64} transformed value
+*/
+function fcn( value ) {
+	return value;
+}
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+	var arr = new Uint64Array( len );
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var out;
+		var i;
+
+		// Benchmark worst case scenario (i.e., every element is visited and written to the output array)...
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			out = arr.map( fcn );
+			if ( typeof out !== 'object' ) {
+				b.fail( 'should return an object' );
+			}
+		}
+		b.toc();
+		if ( !isUint64Array( out ) ) {
+			b.fail( 'should return a Uint64Array' );
+		}
+		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:map:len=%d', pkg, len ), f );
+	}
+}
+
+main();

lib/node_modules/@stdlib/array/uint64/docs/repl.txt

@@ -299,6 +299,40 @@
     <Uint64>[ 2n ]
 
 
+{{alias}}.prototype.map( clbk[, thisArg] )
+    Returns a new array with each element being the result of a provided
+    callback function.
+
+    A callback function is provided the following arguments:
+
+    - value: current array element.
+    - index: current array element index.
+    - arr: the array on which the method was called.
+
+    The returned array has the same data type as the host array.
+
+    Parameters
+    ----------
+    clbk: Function
+        Function which maps array elements to elements in the new array.
+
+    thisArg: any (optional)
+        Execution context.
+
+    Returns
+    -------
+    out: Uint64Array
+        A new typed array.
+
+    Examples
+    --------
+    > function clbk( v ) { return v; };
+    > var arr = new {{alias}}( [ 1, 2 ] )
+    <Uint64Array>[ 1n, 2n ]
+    > var out = arr.map( clbk )
+    <Uint64Array>[ 1n, 2n ]
+
+
 {{alias}}.prototype.set( v[, i] )
     Sets one or more array elements.
 

lib/node_modules/@stdlib/array/uint64/docs/types/index.d.ts

@@ -28,7 +28,7 @@
 import ArrayBuffer = require( '@stdlib/array/buffer' );
 
 // Define a union type representing both iterable and non-iterable iterators:
 type Iterator = Iter | IterableIterator;
 
 // Define a type representing a value from which a 64-bit unsigned integer can be derived:
 type Uint = Uint64 | bigint | number;
@@ -36,7 +36,7 @@
 /**
 * Locale-specific configuration options.
 */
 interface LocaleOptions<T = unknown> {
 	/**
 	* Configuration property.
 	*/
@@ -118,7 +118,7 @@
 * @param arr - array on which the method was called
 * @returns boolean indicating whether an element in an array passes a test
 */
 type Predicate<U> = NullaryPredicate<U> | UnaryPredicate<U> | BinaryPredicate<U> | TernaryPredicate<U>;
 
 /**
 * Callback invoked for each element in an array.
@@ -162,7 +162,7 @@
 * @param arr - array on which the method was called
 * @returns undefined
 */
 type Callback<U> = NullaryCallback<U> | UnaryCallback<U> | BinaryCallback<U> | TernaryCallback<U>;
 
 /**
 * Callback invoked for each element in an array.
@@ -260,7 +260,7 @@
 * @param arr - array on which the method was called
 * @returns accumulated result
 */
 type Reducer<U> = NullaryReducer<U> | UnaryReducer<U> | BinaryReducer<U> | TernaryReducer<U> | QuaternaryReducer<U>;
 
 /**
 * Comparator function.
@@ -269,7 +269,7 @@
 * @param b - second value for comparison
 * @returns number indicating comparison result
 */
 type CompareFcn = ( a: Uint64, b: Uint64 ) => number;
 
 /**
 * Class for creating a 64-bit unsigned integer array.
@@ -477,6 +477,27 @@
 	*/
 	get( i: number ): Uint64 | void;
 
+	/**
+	* Returns a new array with each element being the result of a provided callback function.
+	*
+	* @param fcn - callback function
+	* @param thisArg - execution context
+	* @returns new array containing transformed elements
+	*
+	* @example
+	* var add = require( '@stdlib/number/uint64/base/add' );
+	*
+	* function scale( v ) {
+	*     return add( v, v );
+	* }
+	*
+	* var arr = new Uint64Array( [ 1, 2, 3 ] );
+	*
+	* var out = arr.map( scale );
+	* // returns <Uint64Array>[ 2n, 4n, 6n ]
+	*/
+	map<U = unknown>( fcn: MapFcn<U>, thisArg?: ThisParameterType<MapFcn<U>> ): Uint64Array;
+
 	/**
 	* Sets an array element.
 	*

lib/node_modules/@stdlib/array/uint64/lib/main.js

@@ -740,6 +740,66 @@
 	return getUint64( this._buffer, idx );
 });
 
+/**
+* Returns a new array with each element being the result of a provided callback function.
+*
+* @name map
+* @memberof Uint64Array.prototype
+* @type {Function}
+* @param {Function} fcn - callback function
+* @param {*} [thisArg] - callback function execution context
+* @throws {TypeError} `this` must be a 64-bit unsigned integer array
+* @throws {TypeError} first argument must be a function
+* @throws {TypeError} callback must return either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer
+* @returns {Uint64Array} 64-bit unsigned integer array
+*
+* @example
+* var add = require( '@stdlib/number/uint64/base/add' );
+*
+* function scale( v ) {
+*     return add( v, v );
+* }
+*
+* var arr = new Uint64Array( [ 1, 2, 3 ] );
+*
+* var out = arr.map( scale );
+* // returns <Uint64Array>[ 2n, 4n, 6n ]
+*/
+setReadOnly( Uint64Array.prototype, 'map', function map( fcn, thisArg ) {
+	var outbuf;
+	var words;
+	var buf;
+	var out;
+	var idx;
+	var i;
+	var v;
+	if ( !isUint64Array( this ) ) {
+		throw new TypeError( 'invalid invocation. `this` is not a 64-bit unsigned integer array.' );
+	}
+	if ( !isFunction( fcn ) ) {
+		throw new TypeError( format( 'invalid argument. First argument must be a function. Value: `%s`.', fcn ) );
+	}
+	buf = this._buffer;
+	out = new this.constructor( this._length );
+	outbuf = out._buffer; // eslint-disable-line no-underscore-dangle
+	words = [ 0, 0 ];
+	for ( i = 0; i < this._length; i++ ) {
+		v = fcn.call( thisArg, getUint64( buf, i ), i, this );
+		if ( !isUint64( v ) ) {
+			try {
+				v = new Uint64( v );
+			} catch ( err ) { // eslint-disable-line no-unused-vars
+				throw new TypeError( format( 'invalid argument. Callback must return either a 64-bit unsigned integer or a value which can be converted to a 64-bit unsigned integer. Value: `%s`.', v ) );
+			}
+		}
+		toWords( v, words, 1, 0 );
+		idx = 2 * i;
+		outbuf[ idx+indices.HIGH ] = words[ 0 ];
+		outbuf[ idx+indices.LOW ] = words[ 1 ];
+	}
+	return out;
+});
+
 /**
 * Number of array elements.
 *
@@ -839,7 +899,7 @@
 		buf[ idx+indices.LOW ] = words[ 1 ];
 		return;
 	}
 	if ( isNonNegativeInteger( value ) || ( isBigInt( value ) && isNonNegativeInteger( Number( value ) ) ) ) {
 		if ( idx >= this._length ) {
 			throw new RangeError( format( 'invalid argument. Index argument is out-of-bounds. Value: `%u`.', idx ) );
 		}