141 lines
2.6 KiB
Markdown
141 lines
2.6 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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# isMethod
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> Test if an object has a specified method name.
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<section class="usage">
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## Usage
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```javascript
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var isMethod = require( '@stdlib/assert/is-method' );
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```
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#### isMethod( value, property )
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Returns a `boolean` indicating if a `value` has a specified [**own**][@stdlib/assert/has-own-property] method name.
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```javascript
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function noop() {
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// Example function...
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}
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var value = {
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'beep': noop
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};
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var bool = isMethod( value, 'beep' );
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// returns true
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bool = isMethod( value, 'toString' );
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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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- Value arguments other than `null` or `undefined` are coerced to `objects`.
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```javascript
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var bool = isMethod( 'beep', 'toString' );
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// returns false
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```
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- Property arguments are coerced to `strings`.
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```javascript
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function noop() {
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// Example function...
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}
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var value = {
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'null': noop
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};
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var bool = isMethod( value, null );
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// returns true
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value = {
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'[object Object]': noop
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};
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bool = isMethod( value, {} );
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// returns true
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```
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- The function searches only [**own**][@stdlib/assert/has-own-property] properties.
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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-disable object-curly-newline -->
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<!-- eslint no-undef: "error" -->
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```javascript
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var isMethod = require( '@stdlib/assert/is-method' );
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var bool = isMethod( { 'a': isMethod }, 'a' );
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// returns true
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bool = isMethod( { 'a': 'b' }, 'a' );
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// returns false
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bool = isMethod( { 'a': 'b' }, null );
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// returns false
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bool = isMethod( {}, 'toString' );
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// returns false
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bool = isMethod( null, 'a' );
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// returns false
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bool = isMethod( void 0, 'a' );
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// returns false
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bool = isMethod( { 'null': isMethod }, null );
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// returns true
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bool = isMethod( { '[object Object]': isMethod }, {} );
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// returns true
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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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[@stdlib/assert/has-own-property]: https://www.npmjs.com/package/@stdlib/assert/tree/main/has-own-property
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</section>
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<!-- /.links -->
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