Modern Programming
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Why is the return first?
wrote on last edited by [email protected]Edit... I reread your comment and realized that python does it differently and that everything I typed was irrelevant... I'm still gonna leave it if anyone is interested in ternary expressions, but I suppose the answer to your question is, that's just how python does it.
That's how ternary operators are designed to work. In essence, if you're looking to do a single line if/then, you can directly assign a variable from the result of a ternary expression.
As an example, I was scripting something earlier where there may or may not be a value returned from a function, but I still had to do something with that return value later. For this thing, I was using JavaScript.
I ended up with:
return platform == "name" ? "Option 1" : "Option 2"If I were to write that out in a typical if/then it would be:
if (platform == "name") { return "option 1" } else { return "option 2" }A ternary starts with a boolean expression, then the if true value, else the false value. That's returned to either a variable or if in a function like my example, to the object calling the function. It's just a way to write less code that in many cases is easier to read.
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Yeah... I played that "serial killer or programming language inventor" game.
The only one I was completely in disagreement with was the inventor of Python. He's definitely a mass-murderer
wrote on last edited by [email protected]Are you sure it isn't just that he's Dutch?
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The ternary syntax is really my only real gripe with python design -- putting the conditional BETWEEN the true and false values feels so very messy to me.
It's kinda natural to me having used Perl a lot.
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Python does that, too.
https://docs.python.org/3/library/stdtypes.html#boolean-operations-and-or-not
Are you just referring to how Python uses the English
and/orinstead of the more common&&/||? I think what the user above you was talking about was Lua's strange ternary syntax usingand/or. -
Ah that makes sense.
It doesn't make sense. I understand it, but it doesn't make sense.
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Python is kinda like that in general, unless you try to make it read like ass
You would not believe the number of people I’ve interviewed who excel at making Python read like ass.
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You would not believe the number of people I’ve interviewed who excel at making Python read like ass.
I mean, it does have enough ways to write the same thing that it can really allow for some funny code golf, but some people just have no sense of readability whatsoever.
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It's kinda natural to me having used Perl a lot.
That's not quite the argument you might think it is
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That's not quite the argument you might think it is
Argument?
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print( ["even", "odd"][num % 2] )If you need to avoid evaluating the wrong branch:
print( [lambda: "even", lambda: "odd"][num % 2]() ) -
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For optimal performance, you should rewrite it in Rust:
inline_python::python! { print(js2py.eval_js("(number) => number % 2 ? 'odd' : 'even'")(number)) }; -
Argument?
You know, the stuff in @_
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Are you just referring to how Python uses the English
and/orinstead of the more common&&/||? I think what the user above you was talking about was Lua's strange ternary syntax usingand/or.wrote on last edited by [email protected]no, the linked table shows how python also returns the first non-falsey result of an
a or bexpression rather than just giving a boolean. it's useful for initialising optional reference args:def foo(a: list = None) a = a or []works with
andas well. -
For optimal performance, you should rewrite it in Rust:
inline_python::python! { print(js2py.eval_js("(number) => number % 2 ? 'odd' : 'even'")(number)) };wrote on last edited by [email protected]And now you can use wasm to run it in a browser!
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And now you can use wasm to run it in a browser!
Full circle
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Please. That's C's ternary operator. JS is just a pile of garbage cosplaying as a programming language
Why do you say it's a pile of garbage?
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The ternary syntax is really my only real gripe with python design -- putting the conditional BETWEEN the true and false values feels so very messy to me.
wrote on last edited by [email protected]Eh, reads pretty naturally to me. That said,
(like I lisp) -
It's kinda natural to me having used Perl a lot.
wrote on last edited by [email protected]You clearly haven't used Perl a lot. Perl's ternary looks like:
$even = $num % 2 ? "nay" : "yay";
Incidentally, it is also the same as PHP's, but mainly because PHP stole it.
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Eh, reads pretty naturally to me. That said,
(like I lisp)Oh, (you) (really) (like) (Lisp)?
(That's) (great!) -
Eh, reads pretty naturally to me. That said,
(like I lisp)Lisps makes more sense to me though
(if condition a b)
VS
a if condition else b
