this post was submitted on 07 Sep 2023
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The birth of JS (lemmy.world)
submitted 1 year ago by alphacyberranger@lemmy.world to c/programmer_humor@programming.dev
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[–] rikudou@lemmings.world -1 points 1 year ago (1 children)

Has anyone actually read through that? Reading the first few examples and it's just not understanding how languages work half of the time:

!!"false" == !!"true"; // -> true
!!"false" === !!"true"; // -> true

Wow, no shit, non-empty string coerces to true, who would've guessed! Did you know that !!"bullshit" === !!"true" as well? Mind=blown.

NaN === NaN; // -> false

Again, no shit, that's in the NaN specification and the page even mentions it, so why even include it?

[–] noli@programming.dev 2 points 1 year ago (2 children)

Which is why I'm of the opinion that dynamically typed languages are evil. !!"false" should either be caught at compile time or raise an exception.

I'm thoroughly convinced that the only use of dynamically typed languages is to introduce bugs

[–] Camilo@discuss.tchncs.de 2 points 1 year ago

I am with you. To me these are non-obvious details, just a bug waiting to silently happen in production.

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

Why? IMO that's perfectly valid. The various type coercions are sometimes crazy, but IMO the rule that non-empty string is coerced to true and empty string to false is very simple to follow. The snippet is not even a gotcha, I don't see anything worth failing over. Putting "true" or "false" in a string doesn't change that.