Package Exports

@stdlib/utils-writable-properties-in
@stdlib/utils-writable-properties-in/lib/index.js

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Readme

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writablePropertiesIn

Return an array of an object's own and inherited writable property names and symbols.

Installation

npm install @stdlib/utils-writable-properties-in

Usage

var writablePropertiesIn = require( '@stdlib/utils-writable-properties-in' );

writablePropertiesIn( obj )

Returns an array of an object's own and inherited writable property names and symbols.

var defineProperty = require( '@stdlib/utils-define-property' );

var obj = {};

defineProperty( obj, 'a', {
    'configurable': false,
    'enumerable': false,
    'writable': true,
    'value': 'a'
});

var props = writablePropertiesIn( obj );
// returns [ 'a', ... ]

Examples

var defineProperty = require( '@stdlib/utils-define-property' );
var hasSymbolSupport = require( '@stdlib/assert-has-symbol-support' );
var Symbol = require( '@stdlib/symbol-ctor' );
var writablePropertiesIn = require( '@stdlib/utils-writable-properties-in' );

var hasSymbols = hasSymbolSupport();

function Foo() {
    this.a = 'a';
    defineProperty( this, 'b', {
        'configurable': true,
        'enumerable': true,
        'writable': false,
        'value': 'b'
    });
    if ( hasSymbols ) {
        this[ Symbol( 'a' ) ] = 'a';
        defineProperty( this, Symbol( 'b' ), {
            'configurable': true,
            'enumerable': true,
            'writable': false,
            'value': 'b'
        });
    }
    return this;
}

Foo.prototype.foo = 'bar';
defineProperty( Foo.prototype, 'beep', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'boop'
});
if ( hasSymbols ) {
    Foo.prototype[ Symbol( 'foo' ) ] = 'bar';
    defineProperty( Foo.prototype, Symbol( 'beep' ), {
        'configurable': false,
        'enumerable': false,
        'writable': false,
        'value': 'boop'
    });
}

var obj = new Foo();
var props = writablePropertiesIn( obj );
// e.g., returns [ 'a', 'foo', ... ]

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

License

See LICENSE.

@stdlib/utils-writable-properties-in