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.
This is one of the most educational and entertaining reads on the internet, if you are into that kind of thing:
https://github.com/denysdovhan/wtfjs
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"; // -> trueWow, no shit, non-empty string coerces to true, who would’ve guessed! Did you know that
!!"bullshit" === !!"true"as well? Mind=blown.NaN === NaN; // -> falseAgain, no shit, that’s in the NaN specification and the page even mentions it, so why even include it?
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
I am with you. To me these are non-obvious details, just a bug waiting to silently happen in production.
Why? IMO that’s perfectly valid. The various type coercions are sometimes crazy, but IMO the rule that non-empty string is coerced to
trueand empty string tofalseis 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.