feat: add toString method to array/complex128

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

@@ -1769,6 +1769,23 @@ im = imag( z );
 // returns 6.0
 ```
 
+<a name="method-to-string"></a>
+
+#### Complex128Array.prototype.toString()
+
+Serializes an array as a string.
+
+```javascript
+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 );
+
+var str = arr.toString();
+// returns '1 + 1i,2 - 2i,3 + 3i'
+```
+
 </section>
 
 <!-- /.usage -->

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

@@ -0,0 +1,50 @@
+/**
+* @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 pkg = require( './../package.json' ).name;
+var Complex128Array = require( './../lib' );
+
+
+// MAIN //
+
+bench( pkg+':toString', function benchmark( b ) {
+	var out;
+	var arr;
+	var i;
+
+	arr = new Complex128Array( [ 1, 2, 3, 4, 5, 6 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = arr.toString();
+		if ( typeof out !== 'string' ) {
+			b.fail( 'should return a string' );
+		}
+	}
+	b.toc();
+	if ( typeof out !== 'string' ) {
+		b.fail( 'should return a string' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

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

@@ -0,0 +1,102 @@
+/**
+* @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 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 out;
+		var i;
+
+		b.tic();
+		for ( i = 0; i < b.iterations; i++ ) {
+			out = arr.toString();
+			if ( typeof out !== 'string' ) {
+				b.fail( 'should return a string' );
+			}
+		}
+		b.toc();
+		if ( typeof out !== 'string' ) {
+			b.fail( 'should return a string' );
+		}
+		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+':toString:len='+len, f );
+	}
+}
+
+main();

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

@@ -909,6 +909,22 @@ declare class Complex128Array implements Complex128ArrayInterface {
 	* // returns -3.0
 	*/
 	subarray( begin?: number, end?: number ): Complex64Array;
+
+	/**
+	* Serializes an array as a string.
+	*
+	* @returns string
+	*
+	* @example
+	* var arr = new Complex128Array( 2 );
+	*
+	* arr.set( [ 1.0, 1.0 ], 0 );
+	* arr.set( [ 2.0, 2.0 ], 1 );
+	*
+	* var str = arr.toString();
+	* // returns '1 + 1i,2 + 2i'
+	*/
+	toString(): string;
 }
 
 /**

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

@@ -1945,6 +1945,39 @@ setReadOnly( Complex128Array.prototype, 'subarray', function subarray( begin, en
 	return new this.constructor( buf.buffer, offset, ( len < 0 ) ? 0 : len );
 });
 
+/**
+* Serializes an array as a string.
+*
+* @name toString
+* @memberof Complex128Array.prototype
+* @type {Function}
+* @throws {TypeError} `this` must be a complex number array
+* @returns {string} string representation
+*
+* @example
+* var arr = new Complex128Array( 2 );
+*
+* arr.set( [ 1.0, 1.0 ], 0 );
+* arr.set( [ 2.0, 2.0 ], 1 );
+*
+* var str = arr.toString();
+* // returns '1 + 1i,2 + 2i'
+*/
+setReadOnly( Complex128Array.prototype, 'toString', function toString() {
+	var out;
+	var buf;
+	var i;
+	if ( !isComplexArray( this ) ) {
+		throw new TypeError( 'invalid invocation. `this` is not a complex number array.' );
+	}
+	out = [];
+	buf = this._buffer;
+	for ( i = 0; i < this._length; i++ ) {
+		out.push( getComplex128( buf, i ).toString() );
+	}
+	return out.join( ',' );
+});
+
 
 // EXPORTS //
 

lib/node_modules/@stdlib/array/complex128/test/test.to_string.js

@@ -0,0 +1,97 @@
+/**
+* @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 tape = require( 'tape' );
+var hasOwnProp = require( '@stdlib/assert/has-own-property' );
+var isFunction = require( '@stdlib/assert/is-function' );
+var Complex128Array = require( './../lib' );
+
+
+// TESTS //
+
+tape( 'main export is a function', function test( t ) {
+	t.ok( true, __filename );
+	t.strictEqual( typeof Complex128Array, 'function', 'main export is a function' );
+	t.end();
+});
+
+tape( 'attached to the prototype of the main export is a `toString` method', function test( t ) {
+	t.strictEqual( hasOwnProp( Complex128Array.prototype, 'toString' ), true, 'has property' );
+	t.strictEqual( isFunction( Complex128Array.prototype.toString ), true, 'has method' );
+	t.end();
+});
+
+tape( 'the method throws an error if invoked with a `this` context which is not a complex number array instance', function test( t ) {
+	var values;
+	var arr;
+	var i;
+
+	arr = new Complex128Array( 5 );
+
+	values = [
+		'5',
+		5,
+		NaN,
+		true,
+		false,
+		null,
+		void 0,
+		{},
+		[],
+		function noop() {}
+	];
+	for ( i = 0; i < values.length; i++ ) {
+		t.throws( badValue( values[i] ), TypeError, 'throws an error when provided '+values[i] );
+	}
+	t.end();
+
+	function badValue( value ) {
+		return function badValue() {
+			return arr.toString.call( value );
+		};
+	}
+});
+
+tape( 'the method returns an empty string if invoked on an empty array', function test( t ) {
+	var str;
+	var arr;
+
+	arr = new Complex128Array();
+	str = arr.toString();
+
+	t.strictEqual( str, '', 'returns expected value' );
+	t.end();
+});
+
+tape( 'the method returns a string representation of a complex number array', function test( t ) {
+	var expected;
+	var str;
+	var arr;
+
+	arr = new Complex128Array( [ 1, 2, -3, -4 ] );
+	expected = '1 + 2i,-3 - 4i';
+
+	str = arr.toString();
+
+	t.strictEqual( str, expected, 'returns expected value' );
+	t.end();
+});