#javascriptarray — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #javascriptarray, aggregated by home.social.
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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
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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
-
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