feat: add slice method to array/fixed-endian-factory

lib/node_modules/@stdlib/array/fixed-endian-factory/README.md

@@ -493,6 +493,22 @@ var arr = new Float64ArrayFE( 'little-endian', [ 1.0, 2.0, 3.0 ] );
 var str = arr.toString();
 // returns '1,2,3'
 ```
+#### TypedArrayFE.prototype.slice()
+
+Returns a Sliced Typed Array.
+
+```javascript
+var Float64ArrayFE = fixedEndianFactory( 'float64' );
+
+var arr = new Float64ArrayFE( 'little-endian', [ 1.0, 2.0, 3.0 ] );
+
+var str = arr.slice(1,3);
+// returns '[2.0,3.0]'
+
+str instanceof Float64ArrayFE;
+// returns true
+```
+
 
 </section>
 
@@ -504,6 +520,7 @@ var str = arr.toString();
 
 * * *
 
+
 ## Notes
 
 -   A returned constructor supports the following byte orders:

lib/node_modules/@stdlib/array/fixed-endian-factory/benchmark/benchmark.slice.js

@@ -0,0 +1,55 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 factory = require( './../lib' );
+
+
+// VARIABLES //
+
+var Float64ArrayFE = factory( 'float64' );
+
+
+// MAIN //
+
+bench( pkg+':slice', function benchmark( b ) {
+	var out;
+	var arr;
+	var i;
+
+	arr = new Float64ArrayFE( 'little-endian', [ 1.0, 2.0, 2.0, 1.0 ] );
+
+	b.tic();
+	for ( i = 0; i < b.iterations; i++ ) {
+		out = arr.slice(1, 2);
+		if ( out instanceof Float64ArrayFE === false ) {
+			b.fail( 'should return a TypedArray' );
+		}
+	}
+	b.toc();
+	if ( out instanceof Float64ArrayFE === false ) {
+		b.fail( 'should return a TypedArray' );
+	}
+	b.pass( 'benchmark finished' );
+	b.end();
+});

lib/node_modules/@stdlib/array/fixed-endian-factory/lib/main.js

@@ -723,6 +723,54 @@ function factory( dtype ) { // eslint-disable-line max-lines-per-function, stdli
 		return out.join( ',' );
 	});
 
+	/**
+		* return sliced TypedArray.
+		*
+		* @private
+		* @name slice
+		* @memberof TypedArray.prototype
+		* @type {Function}
+		* @throws {TypeError} `this` must be a typed array instance
+		* @returns {TypedArray} string representation
+		*/
+
+	setReadOnly( TypedArray.prototype, 'slice', function slice() {
+		var value1;
+		var value2;
+		var nargs;
+		var temp;
+		var out;
+		var buf;
+		var i;
+		value1 = arguments[0];
+		value2 = arguments[1];
+		nargs = arguments.length;
+		if (value2 === null || nargs === 1) {
+			value2 = this._length;
+		}
+		if ( nargs < 0 || nargs > 2 || !isNonNegativeInteger( value1 ) || !isNonNegativeInteger( value2 ) ) {
+			throw new TypeError( 'invalid arguments.' );
+		}
+		if ( value1 >= this._length || value2 > this._length || value1 >= value2 ) {
+			throw new RangeError( 'invalid range of arguments.' );
+		}
+		if ( !isTypedArray( this ) ) {
+			throw new TypeError(format('invalid invocation. `this` is not %s %s.', CHAR2ARTICLE[ dtype[0]], CTOR_NAME));
+		}
+		temp = [];
+		buf = this._buffer;
+		for (i = value1; i < value2; i++) {
+			temp.push( buf[GETTER]( i * BYTES_PER_ELEMENT, this._isLE ) );
+		}
+
+		if (this._isLE) {
+			out = new TypedArray( 'little-endian', temp);
+		} else {
+			out = new TypedArray( 'big-endian', temp);
+		}
+		return out;
+	});
+
 	return TypedArray;
 
 	/**

lib/node_modules/@stdlib/array/fixed-endian-factory/test/test.slice.js

@@ -0,0 +1,159 @@
+/**
+* @license Apache-2.0
+*
+* Copyright (c) 2024 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 factory = require( './../lib' );
+
+
+// TESTS //
+
+tape('main export is a function', function test( t ) {
+	t.ok( true, __filename);
+	t.strictEqual( typeof factory, 'function', 'main export is a function');
+	t.end();
+});
+
+tape('the function returns a function', function test( t ) {
+	var ctor = factory('float64');
+	t.strictEqual( isFunction(ctor), true, 'returns expected value');
+	t.end();
+});
+
+tape( 'attached to the prototype of the returned function is a `slice` method', function test( t ) {
+	var ctor = factory('float64');
+	t.strictEqual( hasOwnProp( ctor.prototype, 'slice'), true, 'returns expected value');
+	t.strictEqual( isFunction( ctor.prototype.slice), true, 'returns expected value');
+	t.end();
+});
+
+tape( 'the method throws an error if provided single argument which is not a non-negative integer', function test(t) {
+	var values;
+	var ctor;
+	var arr;
+	var i;
+
+	ctor = factory( 'float64' );
+	arr = new ctor( 'little-endian', 10);
+
+	values = [
+		'5',
+		-4,
+		3.14,
+		NaN,
+		true,
+		false,
+		null,
+		void 0,
+		{},
+		[]
+	];
+	for (i = 0; i < values.length; i++) {
+		t.throws( badValue(values[i]), TypeError, ' throws an error when provided ' + values[i]);
+	}
+	function badValue( value ) {
+		return function badValue() {
+			return arr.slice( value );
+		};
+	}
+	t.end();
+});
+
+tape( 'the method throws an range error if provided two invalid argument ranges ', function test(t) {
+	var values1;
+	var values2;
+	var ctor;
+	var arr;
+	var i;
+
+	ctor = factory( 'float64' );
+	arr = new ctor( 'little-endian', [0, 1, 2, 3, 4] );
+
+	values1 = [
+		1,
+		2,
+		3,
+		4,
+		5,
+		6,
+		7,
+		8,
+		9,
+		10
+	];
+	values2 = [
+		10,
+		9,
+		8,
+		7,
+		6,
+		5,
+		4,
+		3,
+		2,
+		1
+	];
+	for ( i = 0; i < 10; i++ ) {
+		t.throws( badValue( values1[i], values2[i] ), RangeError, 'throws an error when provided arg1 = ' + values1[i] + ', arg2 = ' + values2[i] );
+	}
+	function badValue( v1, v2 ) {
+		return function badValue() {
+			return arr.slice( v1, v2 );
+		};
+	}
+
+	t.end();
+});
+
+tape('the method returns same type array with instance with the parent array ', function test( t ) {
+	var value1;
+	var value2;
+	var narr;
+	var ctor;
+	var arr;
+	var i;
+
+	ctor = factory( 'float64' );
+	arr = new ctor( 'little-endian', [1.0, 2.0, 3.0, 4.0, 5.2] );
+
+	value1 = [
+		0,
+		1,
+		2,
+		3,
+		4
+	];
+	value2 = [
+		1,
+		2,
+		3,
+		4,
+		5
+	];
+
+	for ( i=0; i < 5; i++ ) {
+		narr = arr.slice( value1[0], value2[0] );
+		t.strictEqual( narr instanceof ctor, true, 'returns expected value' );
+	}
+	t.end();
+});