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Javascript is the most popular scripting language in use today (lemmy.world)

submitted 1 year ago* (last edited 1 year ago) by theory to c/[email protected]

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Explanation: it's mostly due to how js does type conversion. for the Ls, it's

[] is an empty array ![] is treated as false combining a boolean with the empty array returns "false" as a string (so true + [] = "true", false + [] = "false") ! + [] is treated as true ! + [] + ! + [] is treated as 2 since true + true = 1 + 1 = 2 so you have "false"[2], which is l for the o it's [] is an empty array [] + {} returns "[object Object]" as a string ({} + [] returns 0) ![] is false !![] is true +!![] casts it to an integer so that part is "[object Object]"[1], which returns "o"

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[–] [email protected] 3 points 1 year ago

For the lazy, but curious, of us...

(! []+[]) [! + [
]+ !+[]]+([
]+{})[ + ! ! [ ]
]+( ! [ ]+[ ] ) [
!+[]+ !+[]]