main.js (1343B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2020 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 PINF = require( '@stdlib/constants/float32/pinf' ); 24 var NINF = require( '@stdlib/constants/float32/ninf' ); 25 26 27 // MAIN // 28 29 /** 30 * Tests if a single-precision floating-point numeric value is infinite. 31 * 32 * @param {number} x - value to test 33 * @returns {boolean} boolean indicating whether the value is infinite 34 * 35 * @example 36 * var bool = isInfinitef( Infinity ); 37 * // returns true 38 * 39 * @example 40 * var bool = isInfinitef( -Infinity ); 41 * // returns true 42 * 43 * @example 44 * var bool = isInfinitef( 5.0 ); 45 * // returns false 46 * 47 * @example 48 * var bool = isInfinitef( NaN ); 49 * // returns false 50 */ 51 function isInfinitef( x ) { 52 return (x === PINF || x === NINF); 53 } 54 55 56 // EXPORTS // 57 58 module.exports = isInfinitef;