time-to-botec

Benchmark sampling in different programming languages
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main.js (1888B)

      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 getOwnPropertySymbols = require( './../../property-symbols' );
     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 symbol properties.
     33 *
     34 * @param {*} value - input object
     35 * @returns {Array} a list of own and inherited writable symbol properties
     36 *
     37 * @example
     38 * var symbols = writablePropertySymbolsIn( {} );
     39 */
     40 function writablePropertySymbolsIn( value ) {
     41 	var symbols;
     42 	var cache;
     43 	var obj;
     44 	var tmp;
     45 	var k;
     46 	var i;
     47 
     48 	if ( value === null || value === void 0 ) {
     49 		return [];
     50 	}
     51 	// Cast the value to an object:
     52 	obj = Object( value );
     53 
     54 	// Walk the prototype chain collecting all writable symbol properties...
     55 	symbols = [];
     56 	cache = {};
     57 	do {
     58 		tmp = getOwnPropertySymbols( obj );
     59 		for ( i = 0; i < tmp.length; i++ ) {
     60 			k = tmp[ i ];
     61 			if (
     62 				hasOwnProp( cache, k ) === false &&
     63 				isWritableProperty( obj, k )
     64 			) {
     65 				symbols.push( k );
     66 			}
     67 			cache[ k ] = true;
     68 		}
     69 		obj = getPrototypeOf( obj );
     70 	} while ( obj );
     71 
     72 	return symbols;
     73 }
     74 
     75 
     76 // EXPORTS //
     77 
     78 module.exports = writablePropertySymbolsIn;