Skip to content

DEV Community

.forEach(), .map(), .filter() .... What's the difference?

Johnson Ogwuru on May 11, 2018

.forEach: .forEach(), is used to execute the same code on every element in an array but does not change the array and it returns undefined. Exampl...

Read full post

Patrick Tingen • May 12 '18

Guys? ;)

Johnson Ogwuru • May 12 '18

Urhmmmmm.. Lol

Patrick Tingen • May 12 '18

It was a bit tongue in cheek, and I don't want to be too PC, but it's these small things that could make a (small) difference.

That's all, folks 😇

Nick Gattuso • May 12 '18

You're being too PC lol. Great article ogwuru.

Johnson Ogwuru • May 12 '18

Thanks nick

Roman Gusev • May 12 '18

Are you assuming that only guys can be interested in higher-order functions?

Ali Abbas • Jun 10 '19

Absolute Knowledge. Great Article Dev

Johnson Ogwuru • Jun 10 '19

Thanks, glad you enjoyed it.

Andrew Tanner 🇪🇺 • May 12 '18

Simple. Love it! Now I know what Map and Filter do.

Johnson Ogwuru • May 12 '18

I'm happy you loved it. Thanks

IsaacLeimgruber • May 13 '18

Fold_left/Fold_right some days?

zain • Mar 19 '21

simple and clean, thanks a lot

Let's Code • Mar 20 '21

i agreed

Let's Code • Mar 20 '21

These are definitely essential knowledge engineers have to know. Would add a supplemental video on top of this post.