time-to-botec/squiggle/node_modules/@stdlib/utils/inherited-nonenumerable-property-names/README.md
NunoSempere b6addc7f05 feat: add the node modules
Necessary in order to clearly see the squiggle hotwiring.
2022-12-03 12:44:49 +00:00

162 lines
3.5 KiB
Markdown

<!--
@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.
-->
# inheritedNonEnumerablePropertyNames
> Return an array of an object's inherited non-enumerable property names.
<section class="usage">
## Usage
<!-- eslint-disable id-length -->
```javascript
var inheritedNonEnumerablePropertyNames = require( '@stdlib/utils/inherited-nonenumerable-property-names' );
```
#### inheritedNonEnumerablePropertyNames( obj\[, level] )
Returns an `array` of an object's inherited non-enumerable property names.
```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 keys = inheritedNonEnumerablePropertyNames( 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.
```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 keys = inheritedNonEnumerablePropertyNames( f, 1 );
// e.g., returns [ 'beep', ... ]
```
</section>
<!-- /.usage -->
<section class="notes">
## Notes
- Name order is not guaranteed, as `object` key 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 keys, thus allowing for deterministic extraction.
</section>
<!-- /.notes -->
<section class="examples">
## Examples
<!-- eslint-disable id-length -->
<!-- eslint no-undef: "error" -->
```javascript
var defineProperty = require( '@stdlib/utils/define-property' );
var inheritedNonEnumerablePropertyNames = require( '@stdlib/utils/inherited-nonenumerable-property-names' );
function Foo() {
this.beep = 'boop';
this.a = {
'b': 'c'
};
defineProperty( this, 'baz', {
'configurable': false,
'enumerable': false,
'writable': true,
'value': 'qux'
});
return this;
}
Foo.prototype.foo = [ 'bar' ];
defineProperty( Foo.prototype, 'bip', {
'configurable': false,
'enumerable': false,
'writable': false,
'value': 'bop'
});
var obj = new Foo();
var keys = inheritedNonEnumerablePropertyNames( obj );
console.log( keys );
// 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
</section>
<!-- /.links -->