77 lines
1.7 KiB
JavaScript
77 lines
1.7 KiB
JavaScript
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var isFunction = require( '@stdlib/assert/is-function' );
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// MAIN //
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/**
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* Returns a function that invokes a provided function with arguments in reverse order.
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*
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* @param {Function} fcn - input function
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* @param {*} [thisArg] - function context
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* @throws {TypeError} first argument must be a function
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* @returns {Function} reverse arguments function
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*
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* @example
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* function foo( a, b, c ) {
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* return [ a, b, c ];
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* }
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*
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* var bar = reverseArguments( foo );
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*
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* var out = bar( 1, 2, 3 );
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* // returns [ 3, 2, 1 ]
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*/
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function reverseArguments( fcn, thisArg ) {
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if ( !isFunction( fcn ) ) {
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throw new TypeError( 'invalid argument. First argument must be a function. Value: `'+fcn+'`.' );
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}
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return reversed;
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/**
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* Invokes a function with arguments in reverse order.
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*
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* @private
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* @param {...*} args - arguments
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* @returns {*} return value
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*/
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function reversed() {
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var args;
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var len;
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var i;
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len = arguments.length;
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args = new Array( len );
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for ( i = 0; i < len; i++ ) {
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args[ len-1-i ] = arguments[ i ];
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}
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return fcn.apply( thisArg, args );
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}
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}
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// EXPORTS //
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module.exports = reverseArguments;
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