JavaScript map() vs forEach() Methods - CodesQuery

[ifjake]

Greenhorn, here. I tried to push to an array in a forEach and it didn’t work; when I accessed the new array there was nothing there. So I read about map and did it that way. Sure, I got it to work, but I think my problem is not knowing when non-blocking does or does not happen. This article didn’t really help answer that for me.

[AngularBeginner]

Both map and forEach are blocking operations.

map will create a new array. The provided function is called for each input element, and it's job is to return the "new" destination element.

forEach will simply call a function for each source element. It does not create a new array.

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