Thanks for pointing that out. This seems like a gray area. I don't know how I got under the impression that forEach mutates the original array items, maybe it was this post I looked up as I was writing the post. It's not entirely clear to me whatforEach actually returns if I ran it on an array its own.
I have around the web read general opinions that forEach iterates straight through arrays without breaking, and skips empty values, so that if one wanted to include a condition it would be easier to go with a for-loop. I don't have enough experience with forEach to tell, tbh
forEach
doesn't mutate an array. Mutation happens only if you explicitly mutate array items in iteration function.I guess if you're using forEach like map you could say it mutates
Well, actually if we execute your examples, we can notice that
forEach
doesn't mutate the original array.Thanks for pointing that out. This seems like a gray area. I don't know how I got under the impression that
forEach
mutates the original array items, maybe it was this post I looked up as I was writing the post. It's not entirely clear to me whatforEach
actually returns if I ran it on an array its own.I have around the web read general opinions that
forEach
iterates straight through arrays without breaking, and skips empty values, so that if one wanted to include a condition it would be easier to go with a for-loop. I don't have enough experience withforEach
to tell, tbhTo address your point "what forEach actually returns", the answer is "nothing".
forEach
does not return a value, it is a void function.Thank you! That makes a lot of sense.