time-to-botec

Benchmark sampling in different programming languages
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is_even.js (1237B)

      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 isInteger = require( './../../../../base/assert/is-integer' );
     24 
     25 
     26 // MAIN //
     27 
     28 /**
     29 * Tests if a finite numeric value is an even number.
     30 *
     31 * @param {number} x - value to test
     32 * @returns {boolean} boolean indicating whether the value is an even number
     33 *
     34 * @example
     35 * var bool = isEven( 5.0 );
     36 * // returns false
     37 *
     38 * @example
     39 * var bool = isEven( -2.0 );
     40 * // returns true
     41 *
     42 * @example
     43 * var bool = isEven( 0.0 );
     44 * // returns true
     45 *
     46 * @example
     47 * var bool = isEven( NaN );
     48 * // returns false
     49 */
     50 function isEven( x ) {
     51 	return isInteger( x/2.0 );
     52 }
     53 
     54 
     55 // EXPORTS //
     56 
     57 module.exports = isEven;