time-to-botec/js/node_modules/@stdlib/utils/inherited-nonenumerable-properties/README.md

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# inheritedNonEnumerableProperties

> Return an array of an object's inherited non-enumerable property names and [symbols][@stdlib/symbol/ctor].

<section class="usage">

## Usage

<!-- eslint-disable id-length -->

```javascript
var inheritedNonEnumerableProperties = require( '@stdlib/utils/inherited-nonenumerable-properties' );
```

#### inheritedNonEnumerableProperties( obj\[, level] )

Returns an `array` of an object's inherited non-enumerable property names and [symbols][@stdlib/symbol/ctor].

<!-- eslint-disable id-length -->

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

function Foo() {
    this.a = 'b';
    return this;
}

defineProperty( Foo.prototype, 'beep', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'boop'
});

var f = new Foo();
var props = inheritedNonEnumerableProperties( f );
// e.g., returns [ 'beep', ... ]
```

By default, the function walks an object's entire prototype chain. To limit the inheritance level, provide a `level` argument.

<!-- eslint-disable id-length -->

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

function Bar() {
    return this;
}

defineProperty( Bar.prototype, 'boop', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'beep'
});

function Foo() {
    Bar.call( this );
    this.a = 'b';
    return this;
}

inherit( Foo, Bar );

defineProperty( Foo.prototype, 'beep', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'boop'
});

var f = new Foo();
var pros = inheritedNonEnumerableProperties( f, 1 );
// e.g., returns [ 'beep', ... ]
```

</section>

<!-- /.usage -->

<section class="notes">

## Notes

-   Property order is not guaranteed, as `object` property enumeration is not specified according to the [ECMAScript specification][ecma-262-for-in]. In practice, however, most engines use insertion order to sort an `object`'s properties, thus allowing for deterministic extraction.

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint-disable id-length -->

<!-- eslint no-undef: "error" -->

```javascript
var hasSymbolSupport = require( '@stdlib/assert/has-symbol-support' );
var Symbol = require( '@stdlib/symbol/ctor' );
var defineProperty = require( '@stdlib/utils/define-property' );
var inheritedNonEnumerableProperties = require( '@stdlib/utils/inherited-nonenumerable-properties' );

var hasSymbols = hasSymbolSupport();
var props;
var obj;

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

Foo.prototype.c = 'd';
defineProperty( Foo.prototype, 'bip', {
    'configurable': false,
    'enumerable': false,
    'writable': false,
    'value': 'bop'
});
if ( hasSymbols ) {
    Foo.prototype[ Symbol( 'c' ) ] = 'd';
    defineProperty( Foo.prototype, Symbol( 'e' ), {
        'configurable': false,
        'enumerable': false,
        'writable': false,
        'value': 'f'
    });
}

obj = new Foo();
props = inheritedNonEnumerableProperties( obj );

console.log( props );
// e.g., => [ 'bip', ... ]
```

</section>

<!-- /.examples -->

<section class="links">

[ecma-262-for-in]: http://www.ecma-international.org/ecma-262/5.1/#sec-12.6.4

[@stdlib/symbol/ctor]: https://www.npmjs.com/package/@stdlib/symbol-ctor

</section>

<!-- /.links -->