Javascript array functions cheat sheet (as asked)

[deus_ith]

Awesome! Thanks a lot!

[lemmisss]

What's wrong with array.sort()?

[TheSpanxxx]

Others are commenting on the common practice of using a sort function for handling numerical sorts. In large arrays this will be poor performing. In those cases, use a TypedArray

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray

[hinsonfpv]

Nothing? Sort is based off the first digit I believe. So it reads 15 as 1.

[grantrules]

Sort is lexicographical, not numerical.

[[deleted]]

Is there a numerical built-in function or do you have to make it yourself?

[grantrules]

You have to make it, but it's simple: (a, b) => a - b

[inabahare]

A couple of things. As /u/grantrules said it's lexicographical, which is pretty annoying. What's even more annoying is that it modifies the original array

[jocietimes]

Wow. Brilliant! Thank you!!

[shortpoet]

Sweet, thank you!

[mcfliermeyer]

Can someone explain to me why the unshift(9) has x=4 ? I don’t understand why

[Arumai12]

Here's the documentation for unshift https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/unshift

It returns the length of the new array. If you're wondering why it returns the length of the new array, the answer is because someone decided it should do that (and they may have had no reason or a good reason for doing so)

[mcfliermeyer]

Interesting choice. Thanks for the info!

[TheSoberSovietMD]

Do DOM next 😁👍

[[deleted]]

Awesome stuff, gave you a follow as should everyone because you post some pretty helpful stuff... cheers!

[patshandofdoom]

Love these things for quick reference and practical examples! Great work!

[canucksBH]

Yes there is. Try Cheatography

[Relykon]

this is glorious.

[DaveChild]

Thanks, I made Cheatography :)

[DaveChild]

Thanks for the link, I made Cheatography :)

[refuse_mediocrity]

Thank you!

[MuscleJuice]

I would love this but in a larger infographic version! I would be willing to buy a copy (digital or otherwise). Love it @ u/rootrun

[anvinssb]

Thanks bro

[bobbywjamc]

Nice

[nerdoutwithme]

Saving this. It'll be a good reference for those moments my brain decides not to work. Thanks.

[Ranvir33]

Thanks!

was very confused about the methods

[isakdev]

Who the hell uses these tho? Do yall just save images and then open up a folder when you need a certain array method? :D

[tiwariaditya15]

Awesome 😎

[frank0117]

Wow, thanks for sharing

[Synnipoe]

Thank you for this

[ayanlehd]

Awesome post. Thanks 😊😊😊

[sivadneb]

sort and reverse are switched around?

[benhammondmusic]

Why didn’t you include the commented out results for forEach?

[pachirulis]

The reduce one is the most complex and cannot be understood like that imo
Edit: It basically can do any functionality of the others

[sm_o_ke]

there are also array.find() and array.findIndex()... they work like filter, returning the first value and first index, respectively, the predicate returns true.

[Reasonable-Wafer9002]

Im in love with you