print("odd" if num % 2 else "even")That’s the native python version, for those curious
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.
- 1 year
Lisps makes more sense to me though
(if condition a b)
VS
a if condition else b
- 1 year
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.
- psud@aussie.zoneEnglish1 year
You do get the if in the middle of stuff though in the form print(debug message) if $debug
- 1 year
Wait until you learn that postfix conditionals are syntactic sugar and the compiler* turns that line into the equivalent of
$debug and print(debug message), putting the conditional in first place, a lot like the ternary operator.* Perl compiles to bytecode before running.
The ternary operator itself isn’t implemented in terms of
and(andor) but it could be.- psud@aussie.zoneEnglish1 year
Luckily I don’t need to read or write bytecode and all that matters to me is the syntax
- 1 year
in Scala, everything is an expression, including “if”, maybe kotlin is the same?
I think it’s just what you’re used to. Imo it really matters that it’s keywords and not operator symbols - it’s meant to read closer to natural language. I prefer the c version when it’s ? and :, but I like them this way round when it’s if and else.
Python is kinda like that in general, unless you try to make it read like ass
- 1 year
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.
- 1 year
I think the idea is it reads more naturally, so you can read it like this
return A if statement is true else return B- Nalivai@discuss.tchncs.deEnglish1 year
Is it really more natural for a non-programmer than “if statement is true than a else b”? I can’t evaluate because of decades of C, so for me the python logic is still bizarre.
- 1 year
Maybe?
For C at least it doesn’t have the actual words, so you need to know what the specific symbols are
var = condition ? a : b. In that expression we don’t know what a or b are in regards to the condition.Python literally is
a if condition else b, so it reads out what is being done.
- 1 year
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.
- Laurel Raven@lemmy.zipEnglish1 year
Oh wow, I think I hate that… Condition between the results? Yuck.
- Ephera@lemmy.mlEnglish1 year
For optimal performance, you should rewrite it in Rust:
inline_python::python! { print(js2py.eval_js("(number) => number % 2 ? 'odd' : 'even'")(number)) };- ulterno@programming.devEnglish1 year
Make sure the browser is made using Rust and run on a VM running on Linux, compiled to WASM.
- 1 year
Please. That’s C’s ternary operator. JS is just a pile of garbage cosplaying as a programming language
- 1 year
One example that’s giving you problems? Maybe even on a daily basis if you use it for work? What’s garbage about it?
- Digital Mark@lemmy.sdf.orgEnglish1 year
print( ["even", "odd"][num % 2] )If you need to avoid evaluating the wrong branch:
print( [lambda: "even", lambda: "odd"][num % 2]() ) - 1 year
Python does that, too.
https://docs.python.org/3/library/stdtypes.html#boolean-operations-and-or-not
- 1 year
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.
1 yearno, 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.
- 1 year
often I do a function called elvis XD with the next signature
elvis(condition, res1, res2)
- 1 year
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
- kn0wmad1c@programming.devEnglish1 year
num % 2isn’t a boolean result in any of these languages, so I feel like it would always output “odd”Edit: 0 is false, everything else is true.
- moomoomoo309@programming.devEnglish1 year
All of those languages will convert numbers into booleans, 0 is false, all other numbers are true.
- 1 year
I agree. If anything it should check if there is a nuumber and 0 is clearly a number.
In JS at least, there’s a concept of truthiness and falsiness.
0,undefined,null, and a few other non-boolean values are treated asfalseif used in conditionals and logical operations, while every other value is treated astrue. I’m pretty sure python has something similar.- 1 year
They are not the same, but 0 can be implicitly converted to false.
What do you get if you do: 0 === false
- 1 year
You’d be surprised.
But seriously, numbers can be used as booleans in an impressive number of languages. Including machine code for almost every machine out there.
