time-to-botec

Benchmark sampling in different programming languages
Log | Files | Refs | README

main.js (1668B)

      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 isObjectLike = require( './../../is-object-like' );
     24 
     25 
     26 // MAIN //
     27 
     28 /**
     29 * Tests if a value is a Buffer instance.
     30 *
     31 * @param {*} value - value to validate
     32 * @returns {boolean} boolean indicating if a value is a Buffer instance
     33 *
     34 * @example
     35 * var v = isBuffer( new Buffer( 'beep' ) );
     36 * // returns true
     37 *
     38 * @example
     39 * var v = isBuffer( new Buffer( [1,2,3,4] ) );
     40 * // returns true
     41 *
     42 * @example
     43 * var v = isBuffer( {} );
     44 * // returns false
     45 *
     46 * @example
     47 * var v = isBuffer( [] );
     48 * // returns false
     49 */
     50 function isBuffer( value ) {
     51 	return (
     52 		isObjectLike( value ) &&
     53 		(
     54 			// eslint-disable-next-line no-underscore-dangle
     55 			value._isBuffer || // for envs missing Object.prototype.constructor (e.g., Safari 5-7)
     56 			(
     57 				value.constructor &&
     58 
     59 				// WARNING: `typeof` is not a foolproof check, as certain envs consider RegExp and NodeList instances to be functions
     60 				typeof value.constructor.isBuffer === 'function' &&
     61 				value.constructor.isBuffer( value )
     62 			)
     63 		)
     64 	);
     65 }
     66 
     67 
     68 // EXPORTS //
     69 
     70 module.exports = isBuffer;