time-to-botec/js/node_modules/@stdlib/assert/is-iterable-like/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

94 lines
2.4 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.
-->
# isIterableLike
> Test if a value is [`iterable`][mdn-iterable-protocol]-like.
<section class="usage">
## Usage
```javascript
var isIterableLike = require( '@stdlib/assert/is-iterable-like' );
```
#### isIterableLike( value )
Tests if a `value` is [`iterable`][mdn-iterator-protocol]-like.
```javascript
var bool = isIterableLike( [] );
// returns <boolean>
bool = isIterableLike( {} );
// returns false
```
</section>
<!-- /.usage -->
<section class="notes">
## Notes
- In order to be [iterable][mdn-iterable-protocol], an `object` must implement the `@@iterator` method, which, when called, returns an [iterator protocol-compliant object][mdn-iterator-protocol].
- An [iterator protocol-compliant object][mdn-iterator-protocol] is an `object` having a `next` method following the [iterator protocol][mdn-iterator-protocol].
- As full [iterator][mdn-iterator-protocol] compliance is **impossible** to achieve without evaluating an [iterator][mdn-iterator-protocol], this function checks **only** for interface compliance.
- In environments lacking `Symbol.iterator` support, this function always returns `false`.
</section>
<!-- /.notes -->
<section class="examples">
## Examples
<!-- eslint no-undef: "error" -->
```javascript
var isIterableLike = require( '@stdlib/assert/is-iterable-like' );
var bool = isIterableLike( [] );
// returns <boolean>
bool = isIterableLike( {} );
// returns false
bool = isIterableLike( null );
// returns false
```
</section>
<!-- /.examples -->
<section class="links">
[mdn-iterable-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol
[mdn-iterator-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterator_protocol
</section>
<!-- /.links -->