Programmer Humor

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The code was very janky, but it worked (i.imgflip.com)

submitted 8 months ago by cantstopthesignal to c/[email protected]

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[–] [email protected] 5 points 8 months ago (13 children)

I am not good friends with js, what did I miss?

[–] mindbleach 14 points 8 months ago (6 children)

JS is a language where [1,2,11].sort() returns [1,11,2].

And if you use a variable instead of a bare array, half the functions are side-effectful, as determined by coin toss.

And if you try declaring that variable with new Array(3).map() then it will ignore all 3 indices, because undefined is real enough to be enumerated, but not real enough to be iterated, because, and I cannot overstress the importance of this principle in Javascript, go fuck yourself. Go fuck yourself is why.

[–] [email protected] 5 points 8 months ago (2 children)

Array(3) doesn't create [undefined, undefined, undefined, ]; it creates [/* hole */, /* hole */, /* hole */, ]. The holes don't set any property on the array whatsoever, so they are skipped when iterating. How this makes sense, I can't tell you.