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Javascript can create atomic bombs (programming.dev)

submitted 1 year ago by TechCodecPawx@programming.dev to c/programmerhumor@lemmy.ml

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[–] adrian783@lemmy.world 1 points 1 year ago (1 children)

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality

mdn goes into it more and it's way more involved than I thought, looks like order of operand doesn't matter. see the number to string section

[–] rikudou@lemmings.world 1 points 1 year ago

It seems it is that way, which is weird. You should always convert to the widest type, meaning string for comparing numbers and strings. I just checked that 1 == "01" is true, which means that "01" gets cast to an integer. And according to the document it might be that for example 1 == "a" would basically be interpreted as 1 === NaN which is false.