feat: add subarray method to array/complex64

lib/node_modules/@stdlib/array/complex64/README.md

@@ -1607,6 +1607,100 @@ var count = context.count;
 // returns 2
 ```
 
+<a name="method-subarray"></a>
+
+#### Complex64Array.prototype.subarray( \[begin\[, end]] )
+
+Creates a new typed array view over the same underlying [`ArrayBuffer`][@stdlib/array/buffer] and with the same underlying data type as the host array.
+
+```javascript
+var realf = require( '@stdlib/complex/realf' );
+var imagf = require( '@stdlib/complex/imagf' );
+
+var arr = new Complex64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
+
+var subarr = arr.subarray();
+// returns <Complex64Array>
+
+var len = subarr.length;
+// returns 4
+
+var z = subarr.get( 0 );
+// returns <Complex64>
+
+var re = realf( z );
+// returns 1.0
+
+var im = imagf( z );
+// returns 2.0
+
+z = subarr.get( len-1 );
+// returns <Complex64>
+
+re = realf( z );
+// returns 7.0
+
+im = imagf( z );
+// returns 8.0
+```
+
+By default, the method creates a typed array view beginning with the first array element. To specify an alternative array index at which to begin, provide a `begin` index (inclusive).
+
+```javascript
+var imagf = require( '@stdlib/complex/imagf' );
+var realf = require( '@stdlib/complex/realf' );
+
+var arr = new Complex64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
+
+var subarr = arr.subarray( 1 );
+// returns <Complex64Array>
+
+var len = subarr.length;
+// returns 3
+
+var z = subarr.get( 0 );
+// returns <Complex64>
+
+var re = realf( z );
+// returns 3.0
+
+var im = imagf( z );
+// returns 4.0
+```
+
+By default, the method creates a typed array view which includes all array elements after `begin`. To limit the number of array elements after `begin`, provide an `end` index (exclusive).
+
+```javascript
+var realf = require( '@stdlib/complex/realf' );
+var imagf = require( '@stdlib/complex/imagf' );
+
+var arr = new Complex64Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );
+
+var subarr = arr.subarray( 1, -1 );
+// returns <Complex64Array>
+
+var len = subarr.length;
+// returns 2
+
+var z = subarr.get( 0 );
+// returns <Complex64>
+
+var re = realf( z );
+// returns 3.0
+
+var im = imagf( z );
+// returns 4.0
+
+z = subarr.get( len-1 );
+// returns <Complex64>
+
+re = realf( z );
+// returns 5.0
+
+im = imagf( z );
+// returns 6.0
+```
+
 </section>
 
 <!-- /.usage -->

lib/node_modules/@stdlib/array/complex64/benchmark/benchmark.subarray.js

@@ -0,0 +1,51 @@
+/**
+* @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 isComplex64Array = require( '@stdlib/assert/is-complex64array' );
+var pkg = require( './../package.json' ).name;
+var Complex64Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg+':subarray', function benchmark( b ) {
+	var out;
+	var arr;
+	var i;
+
+	arr = new Complex64Array( [ 1, 2, 3, 4, 5, 6 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = arr.subarray();
+		if ( typeof out !== 'object' ) {
+			b.fail( 'should return an object' );
+		}
+	}
+	b.toc();
+	if ( !isComplex64Array( out ) ) {
+		b.fail( 'should return a Complex64Array' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/array/complex64/benchmark/benchmark.subarray.length.js

@@ -0,0 +1,103 @@
+/**
+* @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 isComplex64Array = require( '@stdlib/assert/is-complex64array' );
+var pow = require( '@stdlib/math/base/special/pow' );
+var Complex64 = require( '@stdlib/complex/float32' );
+var pkg = require( './../package.json' ).name;
+var Complex64Array = 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 Complex64( i, i ) );
+	}
+	arr = new Complex64Array( arr );
+
+	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 = arr.subarray();
+			if ( typeof out !== 'object' ) {
+				b.fail( 'should return an object' );
+			}
+		}
+		b.toc();
+		if ( !isComplex64Array( out ) ) {
+			b.fail( 'should return a Complex64Array' );
+		}
+		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( pkg+':subarray:len='+len, f );
+	}
+}
+
+main();

lib/node_modules/@stdlib/array/complex64/docs/types/index.d.ts

@@ -761,6 +761,76 @@ declare class Complex64Array implements Complex64ArrayInterface {
 	* // returns true
 	*/
 	some<U = unknown>( predicate: Predicate, thisArg?: ThisParameterType<Predicate<U>> ): boolean;
+
+	/**
+	* Creates a new typed array view over the same underlying `ArrayBuffer` and with the same underlying data type as the host array.
+	*
+	* @param begin - starting index (inclusive)
+	* @param end - ending index (exclusive)
+	* @throws indices must be integers
+	* @returns subarray
+	*
+	* @example
+	* var realf = require( '@stdlib/complex/realf' );
+	* var imagf = require( '@stdlib/complex/imagf' );
+	*
+	* var arr = new Complex64Array( 5 );
+	*
+	* arr.set( [ 1.0, -1.0 ], 0 );
+	* arr.set( [ 2.0, -2.0 ], 1 );
+	* arr.set( [ 3.0, -3.0 ], 2 );
+	* arr.set( [ 4.0, -4.0 ], 3 );
+	* arr.set( [ 5.0, -5.0 ], 4 );
+	*
+	* var subarr = arr.subarray();
+	* // returns <Complex64Array>
+	*
+	* var len = subarr.length;
+	* // returns 5
+	*
+	* var z = subarr.get( 0 );
+	* // returns <Complex64>
+	*
+	* var re = realf( z );
+	* // returns 1.0
+	*
+	* var im = imagf( z );
+	* // returns -1.0
+	*
+	* z = subarr.get( len-1 );
+	* // returns <Complex64>
+	*
+	* re = realf( z );
+	* // returns 5.0
+	*
+	* im = imagf( z );
+	* // returns -5.0
+	*
+	* subarr = arr.subarray( 1, -2 );
+	* // returns <Complex64Array>
+	*
+	* len = subarr.length;
+	* // returns 2
+	*
+	* z = subarr.get( 0 );
+	* // returns <Complex64>
+	*
+	* re = realf( z );
+	* // returns 2.0
+	*
+	* im = imagf( z );
+	* // returns -2.0
+	*
+	* z = subarr.get( len-1 );
+	* // returns <Complex64>
+	*
+	* re = realf( z );
+	* // returns 3.0
+	*
+	* im = imagf( z );
+	* // returns -3.0
+	*/
+	subarray( begin?: number, end?: number ): Complex64Array;
 }
 
 /**