deepEqual

Test for deep equality between two values.

Installation

npm install @stdlib/assert-deep-equal

Usage

var deepEqual = require( '@stdlib/assert-deep-equal' );

deepEqual( a, b )

Returns a boolean indicating if a is deep equal to b.

var bool = deepEqual( [ 1, 2, 3 ], [ 1, 2, 3 ] );
// returns true

bool = deepEqual( [ 1, 2, 3 ], [ 1, 2, '3' ] );
// returns false

bool = deepEqual( { 'a': 2 }, { 'a': [ 2 ] } );
// returns false

Notes

• The function uses strict equality checks (===) and does not perform any type coercion.
• When given two objects, only enumerable own properties are recursively compared.

Examples

var deepEqual = require( '@stdlib/assert-deep-equal' );

var a = [ true, false, true ];
var b = [ true, false, true ];
var bool = deepEqual( a, b );
// returns true

b.pop();
bool = deepEqual( a, b );
// returns false

a = { 'a': { 'b': { 'c': 'd' } } };
b = { 'a': { 'b': { 'c': 'd' } } };
bool = deepEqual( a, b );
// returns true

b.a.b.c = null;
bool = deepEqual( a, b );
// returns false

a = { 'a': [ { 'b': 0 }, { 'c': 1 } ] };
b = { 'a': [ { 'b': 0 }, { 'c': 1 } ] };
bool = deepEqual( a, b );
// returns true

b = { 'a': [ { 'b': [ 0 ] }, { 'c': '1' } ] };
bool = deepEqual( a, b );
// returns false

See Also

• @stdlib/assert-is-strict-equal: test if two arguments are strictly equal.
• @stdlib/assert-is-same-value: test if two arguments are the same value.

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.