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[-] ferric_carcinization@lemmy.ml 5 points 4 days ago

Rust would allow you to

let ret = if some_condition {
    <a lot of expensive calculations>
    result_of_operations
} else {
    <a lot of other different expensive calculations>
    result_of_other_operations
};

Now you don't have to declare it inside the blocks.

[-] barubary@infosec.exchange 5 points 4 days ago

Similarly, Perl lets you say

my $ret = do {    if (...) {        ...    } else {        ...    }};

[-] notarobot@lemm.ee -2 points 4 days ago

That's.. Disgusting

[-] ferric_carcinization@lemmy.ml 4 points 4 days ago

What's disgusting about it? The only thing I can think of is the implicit return, which felt a bit icky at first.

Also, as the if expression is an expression, you can call methods on it like so:

if 1 > 2 {
    3
} else {
    4
}.min(5)

(the above is still an expression, so it could be used, for example, as part of a condition for another if)

Of course, you can write horrible code in any language, but the ability to use blocks where expressions are expected can be great sometimes.

[-] Ephera@lemmy.ml 2 points 4 days ago

It's the same thing as ternary, just without the ? : syntax.

this post was submitted on 19 Jun 2025

93 points (86.6% liked)

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