74 lines
1.6 KiB
JavaScript
74 lines
1.6 KiB
JavaScript
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/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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// MODULES //
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var propertyNames = require( './../../property-names' );
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var propertySymbols = require( './../../property-symbols' );
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var isWritable = require( '@stdlib/assert/is-writable-property' );
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// MAIN //
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/**
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* Returns an array of an object's own writable property names and symbols.
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*
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* @param {*} value - input object
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* @returns {Array} a list of own property writable names and symbols
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*
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* @example
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* var obj = {
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* 'beep': 'boop',
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* 'foo': 3.14
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* };
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*
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* var props = writableProperties( obj );
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* // e.g., returns [ 'beep', 'foo' ]
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*/
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function writableProperties( value ) {
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var out;
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var tmp;
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var n;
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var i;
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out = propertyNames( value );
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n = 0;
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for ( i = 0; i < out.length; i++ ) {
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if ( isWritable( value, out[ i ] ) ) {
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out[ n ] = out[ i ];
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n += 1;
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}
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}
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out.length = n;
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tmp = propertySymbols( value );
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for ( i = 0; i < tmp.length; i++ ) {
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if ( isWritable( value, tmp[ i ] ) ) {
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out.push( tmp[ i ] );
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}
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}
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return out;
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}
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// EXPORTS //
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module.exports = writableProperties;
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