main.js (1458B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2018 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var isFunction = require( './../../is-function' ); 24 25 26 // MAIN // 27 28 /** 29 * Tests if an object has a specified method name, either own or inherited. 30 * 31 * @param {*} value - value to test 32 * @param {*} property - property to test 33 * @returns {boolean} boolean indicating if an object has a specified method name 34 * 35 * @example 36 * var beep = { 37 * 'boop': true 38 * }; 39 * 40 * var bool = isMethodIn( beep, 'toString' ); 41 * // returns true 42 * 43 * bool = isMethodIn( beep, 'boop' ); 44 * // returns false 45 */ 46 function isMethodIn( value, property ) { 47 if ( value === void 0 || value === null ) { 48 return false; 49 } 50 value = Object( value ); 51 if ( typeof property !== 'symbol' ) { 52 property = String( property ); 53 } 54 return ( 55 ( property in value ) && 56 isFunction( value[ property ] ) 57 ); 58 } 59 60 61 // EXPORTS // 62 63 module.exports = isMethodIn;