114 lines
2.2 KiB
Markdown
114 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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# deepEqual
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> Test for deep equality between two values.
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<section class="usage">
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## Usage
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```javascript
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var deepEqual = require( '@stdlib/assert/deep-equal' );
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```
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#### deepEqual( a, b )
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Returns a `boolean` indicating if `a` is deep equal to `b`.
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<!-- eslint-disable object-curly-newline, object-curly-spacing -->
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```javascript
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var bool = deepEqual( [ 1, 2, 3 ], [ 1, 2, 3 ] );
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// returns true
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bool = deepEqual( [ 1, 2, 3 ], [ 1, 2, '3' ] );
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// returns false
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bool = deepEqual( { 'a': 2 }, { 'a': [ 2 ] } );
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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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- The function uses strict equality checks (`===`) and does not perform any type coercion.
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- When given two objects, only enumerable own properties are recursively compared.
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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", object-curly-newline: "off", object-curly-spacing: "off" -->
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```javascript
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var deepEqual = require( '@stdlib/assert/deep-equal' );
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var bool;
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var a;
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var b;
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a = [ true, false, true ];
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b = [ true, false, true ];
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bool = deepEqual( a, b );
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// returns true
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b.pop();
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bool = deepEqual( a, b );
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// returns false
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a = { 'a': { 'b': { 'c': 'd' } } };
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b = { 'a': { 'b': { 'c': 'd' } } };
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bool = deepEqual( a, b );
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// returns true
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b.a.b.c = null;
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bool = deepEqual( a, b );
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// returns false
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a = { 'a': [ { 'b': 0 }, { 'c': 1 } ] };
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b = { 'a': [ { 'b': 0 }, { 'c': 1 } ] };
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bool = deepEqual( a, b );
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// returns true
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b = { 'a': [ { 'b': [ 0 ] }, { 'c': '1' } ] };
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bool = deepEqual( a, b );
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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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</section>
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<!-- /.links -->
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