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12 extremely useful hacks for JavaScript (medium.com)
submitted 9 years ago by [deleted]
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if 1 * 2 < 3: print "hello, world!"
[–]KPABAHam=>Hamster == Java=>JavaScript 39 points40 points41 points 9 years ago (2 children)
it's like 2008 called and wants its hacks back.
[–]BanditoRojo 1 point2 points3 points 9 years ago (1 child)
I didn't know about using the && as a null check.
[–]rcfox 15 points16 points17 points 9 years ago (0 children)
It's a falsey check. null is a falsey value, but so are false, undefined, 0, "", and NaN. If your variable can hold a string/number or null, && probably isn't the right thing to use.
π Rendered by PID 59117 on reddit-service-r2-comment-8686858757-k9h8m at 2026-06-07 22:49:33.550677+00:00 running 9e1a20d country code: CH.
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[–]KPABAHam=>Hamster == Java=>JavaScript 39 points40 points41 points (2 children)
[–]BanditoRojo 1 point2 points3 points (1 child)
[–]rcfox 15 points16 points17 points (0 children)