time-to-botec

Benchmark sampling in different programming languages
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main.js (2124B)

      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 getOwnPropertyNames = require( './../../property-names' );
     24 var getPrototypeOf = require( './../../get-prototype-of' );
     25 var isWritableProperty = require( '@stdlib/assert/is-writable-property' );
     26 var hasOwnProp = require( '@stdlib/assert/has-own-property' );
     27 
     28 
     29 // MAIN //
     30 
     31 /**
     32 * Returns an array of an object's own and inherited writable property names.
     33 *
     34 * @param {*} value - input object
     35 * @returns {Array} a list of own and inherited writable property names
     36 *
     37 * @example
     38 * var defineProperty = require( '@stdlib/utils/define-property' );
     39 *
     40 * var obj = { 'a': 'b' };
     41 *
     42 * defineProperty( obj, 'beep', {
     43 *     'configurable': true,
     44 *     'enumerable': true,
     45 *     'writable': false,
     46 *     'value': 'boop'
     47 * });
     48 *
     49 * var keys = writablePropertyNamesIn( obj );
     50 * // e.g., returns [ 'a', ... ]
     51 */
     52 function writablePropertyNamesIn( value ) {
     53 	var names;
     54 	var cache;
     55 	var obj;
     56 	var tmp;
     57 	var k;
     58 	var i;
     59 
     60 	if ( value === null || value === void 0 ) {
     61 		return [];
     62 	}
     63 	// Cast the value to an object:
     64 	obj = Object( value );
     65 
     66 	// Walk the prototype chain collecting writable property names...
     67 	names = [];
     68 	cache = {};
     69 	do {
     70 		tmp = getOwnPropertyNames( obj );
     71 		for ( i = 0; i < tmp.length; i++ ) {
     72 			k = tmp[ i ];
     73 			if (
     74 				hasOwnProp( cache, k ) === false &&
     75 				isWritableProperty( obj, k )
     76 			) {
     77 				names.push( k );
     78 			}
     79 			cache[ k ] = true;
     80 		}
     81 		obj = getPrototypeOf( obj );
     82 	} while ( obj );
     83 
     84 	return names;
     85 }
     86 
     87 
     88 // EXPORTS //
     89 
     90 module.exports = writablePropertyNamesIn;