102 lines
2.2 KiB
Markdown
102 lines
2.2 KiB
Markdown
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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# isIteratorLike
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> Test if a value is [`iterator`][mdn-iterator-protocol]-like.
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<section class="usage">
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## Usage
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```javascript
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var isIteratorLike = require( '@stdlib/assert/is-iterator-like' );
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```
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#### isIteratorLike( value )
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Tests if a `value` is [`iterator`][mdn-iterator-protocol]-like.
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<!-- eslint-disable no-restricted-syntax, no-empty-function -->
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```javascript
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var obj = {
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'next': function noop() {}
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};
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var bool = isIteratorLike( obj );
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// returns true
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bool = isIteratorLike( {} );
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// returns false
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```
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</section>
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<!-- /.usage -->
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<section class="notes">
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## Notes
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- An [iterator protocol-compliant object][mdn-iterator-protocol] is an `object` having a `next` method following the [iterator protocol][mdn-iterator-protocol].
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- 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.
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</section>
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<!-- /.notes -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var noop = require( '@stdlib/utils/noop' );
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var isIteratorLike = require( '@stdlib/assert/is-iterator-like' );
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var obj = {
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'next': noop
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};
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var bool = isIteratorLike( obj );
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// returns true
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bool = isIteratorLike( {} );
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// returns false
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bool = isIteratorLike( [] );
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// returns false
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bool = isIteratorLike( null );
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// returns false
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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[mdn-iterator-protocol]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterator_protocol
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</section>
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<!-- /.links -->
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