How to Stop array_map From Losing Keys

array_map resets keys and breaks associations.

#php #arraymap #keys #bug #howto #arrays

https://www.youtube.com/watch?v=mFY-PR9aG3Y

Array.map() IGNORES Empty Slots?!

🤯 STOP! This will DESTROY your understanding of arrays! Empty slots vs undefined - they're NOT the same! .map() completely skips holes but processes undefined. This bug crashed a production app with 1M users!

#javascript #javascripttricks #codingchallenge #javascriptarray #arrayholes #javascriptquiz #javascriptweird #javascriptwtf #arraymap #javascriptbugs #codinginterview #javascriptshorts

https://www.youtube.com/watch?v=cwm9fdAlAB4