time-to-botec/squiggle/node_modules/@stdlib/utils/enumerable-property-symbols-in/lib/main.js
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

79 lines
1.9 KiB
JavaScript

/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var getOwnPropertySymbols = require( './../../property-symbols' );
var getPrototypeOf = require( './../../get-prototype-of' );
var isEnumerableProperty = require( '@stdlib/assert/is-enumerable-property' );
var hasOwnProp = require( '@stdlib/assert/has-own-property' );
// MAIN //
/**
* Returns an array of an object's own and inherited enumerable symbol properties.
*
* @param {*} value - input object
* @returns {Array} a list of own and inherited enumerable symbol properties
*
* @example
* var symbols = enumerablePropertySymbolsIn( {} );
*/
function enumerablePropertySymbolsIn( value ) { // eslint-disable-line id-length
var symbols;
var cache;
var obj;
var tmp;
var k;
var i;
if ( value === null || value === void 0 ) {
return [];
}
// Cast the value to an object:
obj = Object( value );
// Walk the prototype chain collecting enumerable symbol properties...
symbols = [];
cache = {};
do {
tmp = getOwnPropertySymbols( obj );
for ( i = 0; i < tmp.length; i++ ) {
k = tmp[ i ];
if (
hasOwnProp( cache, k ) === false && // guards against processing a symbol more than once
isEnumerableProperty( obj, k )
) {
symbols.push( k );
}
cache[ k ] = true;
}
obj = getPrototypeOf( obj );
} while ( obj );
return symbols;
}
// EXPORTS //
module.exports = enumerablePropertySymbolsIn;