deep-is
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Package description
The deep-is npm package provides a utility function for performing deep equality checks between two values. It can be used to determine if two objects, arrays, or other nested structures have the same content, regardless of whether they are the same reference in memory.
Deep Equality Check
This feature allows you to compare two complex objects or arrays to determine if they are deeply equal, meaning that their structure and values are the same, even if they are different instances in memory.
var deepEqual = require('deep-is');
console.log(deepEqual({ a: 1, b: { c: 1 } }, { a: 1, b: { c: 1 } })); // true
console.log(deepEqual([1, 2, [3, 4]], [1, 2, [3, 4]])); // true
console.log(deepEqual({ a: 1, b: { c: 1 } }, { a: 1, b: { c: 2 } })); // falseLodash provides a method called isEqual which performs a deep comparison between two values to determine if they are equivalent. It handles a wide variety of data types and is known for its performance and reliability. Compared to deep-is, lodash is a larger library with many more utility functions, but lodash.isequal can be used independently.
fast-deep-equal is a package that offers a fast deep equality comparison algorithm. It claims to be the fastest library for deep equality checks. Unlike deep-is, fast-deep-equal focuses solely on performance and may be a better choice for performance-critical applications.
deep-equal is another npm package that provides functionality similar to deep-is. It offers strict and non-strict comparison modes and can handle circular references. While deep-is is minimalistic and straightforward, deep-equal provides additional options for comparison customization.
Readme
Node's assert.deepEqual() algorithm as a standalone module. Exactly like
deep-equal except for the fact that deepEqual(NaN, NaN) === true.
This module is around 5 times faster
than wrapping assert.deepEqual() in a try/catch.
var equal = require('deep-is');
console.dir([
equal(
{ a : [ 2, 3 ], b : [ 4 ] },
{ a : [ 2, 3 ], b : [ 4 ] }
),
equal(
{ x : 5, y : [6] },
{ x : 5, y : 6 }
)
]);
var deepIs = require('deep-is')
Compare objects a and b, returning whether they are equal according to a
recursive equality algorithm.
With npm do:
npm install deep-is
With npm do:
npm test
Copyright (c) 2012, 2013 Thorsten Lorenz thlorenz@gmx.de Copyright (c) 2012 James Halliday mail@substack.net
Derived largely from node's assert module, which has the copyright statement:
Copyright (c) 2009 Thomas Robinson <280north.com>
Released under the MIT license, see LICENSE for details.
FAQs
node's assert.deepEqual algorithm except for NaN being equal to NaN
The npm package deep-is receives a total of 28,563,437 weekly downloads. As such, deep-is popularity was classified as popular.
We found that deep-is demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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