feat: add forEach method to array/complex128

lib/node_modules/@stdlib/array/complex128/README.md

@@ -1195,6 +1195,72 @@ var count = context.count;
 // returns 3
 ```
 
+<a name="method-for-each"></a>
+
+#### Complex128Array.prototype.forEach( callbackFn\[, thisArg] )
+
+Invokes a function once for each array element.
+
+```javascript
+var Complex128 = require( '@stdlib/complex/float64' );
+
+function log( v, i ) {
+    console.log( '%s: %s', i, v.toString() );
+}
+
+var arr = new Complex128Array( 3 );
+
+// Set the first three elements:
+arr.set( [ 1.0, 1.0 ], 0 );
+arr.set( [ 2.0, 2.0 ], 1 );
+arr.set( [ 3.0, 3.0 ], 2 );
+
+arr.forEach( log );
+/* =>
+    0: 1 + 1i
+    1: 2 + 2i
+    2: 3 + 3i
+*/
+```
+
+The invoked 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 Complex128 = require( '@stdlib/complex/float64' );
+
+function fcn( v, i ) {
+    this.count += 1;
+    console.log( '%s: %s', i, v.toString() );
+}
+
+var arr = new Complex128Array( 3 );
+
+var context = {
+    'count': 0
+};
+
+// Set the first three elements:
+arr.set( [ 1.0, -1.0 ], 0 );
+arr.set( [ 2.0, -2.0 ], 1 );
+arr.set( [ 3.0, -3.0 ], 2 );
+
+arr.forEach( fcn, context );
+/* =>
+    0: 1 + 1i
+    1: 2 + 2i
+    2: 3 + 3i
+*/
+
+var count = context.count;
+// returns 3
+```
+
 <a name="method-get"></a>
 
 #### Complex128Array.prototype.get( i )

lib/node_modules/@stdlib/array/complex128/benchmark/benchmark.for_each.js

@@ -0,0 +1,56 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2023 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 isComplex128 = require( '@stdlib/assert/is-complex128' );
+var pkg = require( './../package.json' ).name;
+var Complex128Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg+':forEach', function benchmark( b ) {
+	var arr;
+	var i;
+
+	arr = new Complex128Array( [ 1, 2, 3, 4 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		arr.forEach( check );
+		if ( arr.length !== 2 ) {
+			b.fail( 'should not change an array length' );
+		}
+	}
+	b.toc();
+	if ( arr.length !== 2 ) {
+		b.fail( 'should not change an array length' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+
+	function check( v ) {
+		if ( !isComplex128( v ) ) {
+			b.fail( 'should be a complex number' );
+		}
+	}
+});

lib/node_modules/@stdlib/array/complex128/benchmark/benchmark.for_each.length.js

@@ -0,0 +1,109 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2023 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 Complex128 = require( '@stdlib/complex/float64' );
+var real = require( '@stdlib/complex/real' );
+var imag = require( '@stdlib/complex/imag' );
+var pkg = require( './../package.json' ).name;
+var Complex128Array = require( './../lib' );
+
+
+// FUNCTIONS //
+
+/**
+* Creates a benchmark function.
+*
+* @private
+* @param {PositiveInteger} len - array length
+* @returns {Function} benchmark function
+*/
+function createBenchmark( len ) {
+	var arr;
+	var i;
+
+	arr = [];
+	for ( i = 0; i < len; i++ ) {
+		arr.push( new Complex128( i, i ) );
+	}
+	arr = new Complex128Array( arr );
+
+	return benchmark;
+
+	/**
+	* Benchmark function.
+	*
+	* @private
+	* @param {Benchmark} b - benchmark instance
+	*/
+	function benchmark( b ) {
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			arr.forEach( callback );
+			if ( arr.length !== len ) {
+				b.fail( 'should not change an array length' );
+			}
+		}
+		b.toc();
+		if ( arr.length !== len ) {
+			b.fail( 'should not change an array length' );
+		}
+		b.pass( 'benchmark finished' );
+		b.end();
+
+		function callback( value ) {
+			if ( real( value ) !== imag( value ) ) {
+				throw new Error( 'something went wrong' );
+			}
+		}
+	}
+}
+
+
+// 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( pkg+':forEach:len='+len, f );
+	}
+}
+
+main();

lib/node_modules/@stdlib/array/complex128/docs/types/index.d.ts

@@ -107,6 +107,50 @@ type TernaryPredicate<U> = ( this: U, value: Complex128, index: number, arr: Com
 */
 type Predicate<U> = NullaryPredicate<U> | UnaryPredicate<U> | BinaryPredicate<U> | TernaryPredicate<U>;
 
+/**
+* Callback invoked for each element in an array.
+*
+* @returns undefined
+*/
+type NullaryCallback<U> = ( this: U ) => void;
+
+/**
+* Callback invoked for each element in an array.
+*
+* @param value - current array element
+* @returns undefined
+*/
+type UnaryCallback<U> = ( this: U, value: Complex128 ) => void;
+
+/**
+* Callback invoked for each element in an array.
+*
+* @param value - current array element
+* @param index - current array element index
+* @returns undefined
+*/
+type BinaryCallback<U> = ( this: U, value: Complex128, index: number ) => void;
+
+/**
+* Callback invoked for each element in an array.
+*
+* @param value - current array element
+* @param index - current array element index
+* @param arr - array on which the method was called
+* @returns undefined
+*/
+type TernaryCallback<U> = ( this: U, value: Complex128, index: number, arr: Complex128Array ) => void;
+
+/**
+* Callback invoked for each element in an array.
+*
+* @param value - current array element
+* @param index - current array element index
+* @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.
 *
@@ -543,6 +587,33 @@ declare class Complex128Array implements Complex128ArrayInterface {
 	*/
 	findLastIndex<U = unknown>( predicate: Predicate<U>, thisArg?: ThisParameterType<Predicate<U>> ): number;
 
+	/**
+	* Invokes a function once for each array element.
+	*
+	* @param fcn - function to invoke
+	* @param thisArg - execution context
+	* @returns undefined
+	*
+	* @example
+	* var Complex128 = require( '@stdlib/complex/float64' );
+	*
+	* function log( v, i ) {
+	*     console.log( '%s: %s', i, v.toString() );
+	* }
+	*
+	* var arr = new Complex128Array( 3 );
+	*
+	* arr.set( [ 1.0, 1.0 ], 0 );
+	* arr.set( [ 2.0, 2.0 ], 1 );
+	* arr.set( [ 3.0, 3.0 ], 2 );
+	*
+	* arr.forEach( log );
+	* // => 0: 1 + 1i
+	* // => 1: 2 + 2i
+	* // => 2: 3 + 3i
+	*/
+	forEach<U = unknown>( fcn: Callback<U>, thisArg?: ThisParameterType<Callback<U>> ): void;
+
 	/**
 	* Returns an array element.
 	*

lib/node_modules/@stdlib/array/complex128/lib/main.js

@@ -1189,6 +1189,49 @@ setReadOnly( Complex128Array.prototype, 'findLastIndex', function findLastIndex(
 	return -1;
 });
 
+/**
+* Invokes a function once for each array element.
+*
+* @name forEach
+* @memberof Complex128Array.prototype
+* @type {Function}
+* @param {Function} fcn - function to invoke
+* @param {*} [thisArg] - function invocation context
+* @throws {TypeError} `this` must be a complex number array
+* @throws {TypeError} first argument must be a function
+*
+* @example
+* var Complex128 = require( '@stdlib/complex/float64' );
+*
+* function log( v, i ) {
+*     console.log( '%s: %s', i, v.toString() );
+* }
+*
+* var arr = new Complex128Array( 3 );
+*
+* arr.set( [ 1.0, 1.0 ], 0 );
+* arr.set( [ 2.0, 2.0 ], 1 );
+* arr.set( [ 3.0, 3.0 ], 2 );
+*
+* arr.forEach( log );
+*/
+setReadOnly( Complex128Array.prototype, 'forEach', function forEach( fcn, thisArg ) {
+	var buf;
+	var i;
+	var z;
+	if ( !isComplexArray( this ) ) {
+		throw new TypeError( 'invalid invocation. `this` is not a complex number array.' );
+	}
+	if ( !isFunction( fcn ) ) {
+		throw new TypeError( format( 'invalid argument. First argument must be a function. Value: `%s`.', fcn ) );
+	}
+	buf = this._buffer;
+	for ( i = 0; i < this._length; i++ ) {
+		z = getComplex128( buf, i );
+		fcn.call( thisArg, z, i, this );
+	}
+});
+
 /**
 * Returns an array element.
 *