Oct 20, 2011 · There are plenty of answers showing how to compare arrays efficiently. Below is the shortest way to compare two int or (string) arrays, measured in bytes of code.

Sep 15, 2012 · I have two arrays, and I want to be able to compare the two and only return the values that match. For example both arrays have the value cat so that is what will be returned. …

A rule of thumb here is not to mess with objects you don't own. Array.prototype is a built-in prototype object for type Arrays and this will cause inconsistency while working in a team.

Feb 15, 2023 · To compare two arrays of objects efficiently, you can: Convert objects to strings: Convert each object in both arrays to a string representation using JSON.stringify().

This is what you get if you take the difference of both arrays with each other, and combine the two results (You get an array containing all the elements of A that are not in B and vice-versa).

Jun 25, 2010 · Array.prototype.sort() is shallow and Array.prototype.toString() converts objects to [object Object] and flattens any embedded arrays, which could cause a false positive.

Jan 29, 2014 · I have seen many posts about how to compare two arrays in JavaScript and do something if you find a match. I wanted to know how to write the opposite. I have two arrays …

Sep 7, 2022 · I have two arrays and I'm trying to check if they contain the same data, without caring about the order. Is there a simple and fast way to do this?

I have two arrays that I need to check against each other and if they have reached a point where both items in each array are actually the same as one another, then append some html …

Jun 7, 2012 · What's the fastest/best way to compare two arrays and return the difference? Much like array_diff in PHP. Is there an easy function or am I going to have to create one via each()? …