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parseInt(5)
(lemmy.ml)
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this post was submitted on 05 May 2025
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Another classic javascript wat
Classic people who don't know how to code wat. Passing a number in place of a string argument because they don't know what they're doing.
Javascript could throw an error to alert you that the input is supposed to be a string, like most languages would do.
But you're calling a function specifically made for passing a string to an int... 😆 There's gotta be some common sense somewhere here, guys.
Still, it's a very good point. JS should do this.
I would suspect one reason it doesn't do this is to be backwards compatible.
Theoretically, Javascript is an untyped language, so there aren't supposed to really be static types. Giving type errors in this situation would be against design.
Maybe the design is bad, then.
Lol you'll get no argument from me. It's not my favorite language.
JavaScript has types and it does have type errors, for instance
Please stop spouting nonsense on issues you know nothing about.
Dynamic types aren't static types my man. I think you got some learning to do.
Function only handles string arguments correctly. Wat.
It's not a string argument though, it's JS. You can argue it's expected to be a string but like the rest of JS all you can know from the signature alone is that it takes an object. Hopefully your little ducky quacks the right way!
Huh? The code in the image is passing a number argument where there should be a string argument.
And this function is specifically made to parse a string into an int. Apply common sense.
JavaScript doesn't have typed parameters or variables. The function expects a string and does things in the function body which converts the object into a string. JS shares this behavior with all dynamically typed languages and it's extremely useful in some contexts and extremely frustrating in others. It's down to what it's being used for. Dynamic languages make excellent scripting languages, see Python really just being a souped up shell lang
... These are different words that describe exactly what I'm saying. I'm saying: in the place where there should be a string argument, because the function expects one, there is not a string argument, but a number argument. (Not an object like you keep saying.)
I know all that stuff about dynamically typed languages. I'm just saying that the function is being used indirectly here.
You cannot have a string argument, arguments and variables in JS don't have a type. All you have in JS is objects. Actual functions, like full on
function foo(){}are still objects, like you can actually store data on the things.Could be a variable from somewhere else in the code. It should throw type error of some sort if it's not going to handle a float correctly
Agreed, functions in general should do this, and some do. But it should probably be automatic. And the variable argument is a good one, a very good argument for TypeScript. ❤️
What do you mean, you don't use string parsing method to round to integers? /s
Love you 😆