primitive.js (1106B)
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 /** 22 * Tests if a value is a number primitive. 23 * 24 * @param {*} value - value to test 25 * @returns {boolean} boolean indicating if a value is a number primitive 26 * 27 * @example 28 * var bool = isNumber( 3.14 ); 29 * // returns true 30 * 31 * @example 32 * var bool = isNumber( NaN ); 33 * // returns true 34 * 35 * @example 36 * var bool = isNumber( new Number( 3.14 ) ); 37 * // returns false 38 */ 39 function isNumber( value ) { 40 return ( typeof value === 'number' ); 41 } 42 43 44 // EXPORTS // 45 46 module.exports = isNumber;