Rust for JavaScript Developers – Functions and Control Flow

Re:Rust for JavaScript Developers – Functions and Control Flow by bobbylarrybobby on Monday July 06, 2020 @12:45AM (#23744771)

I find ternary operators perfectly readable if you split the parts across lines — they map exactly to the conditions and statements in an if-else group.

    Cond1 // if this
    ? Result1 // return this
    : cond2 // else if this
    ? Result2 // return this
    : cond3 // else if this
    ? Result3 // return this
    : ResultElse // else return this

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Re:Rust for JavaScript Developers – Functions and Control Flow by mekkkkkk on Monday July 06, 2020 @06:13AM (#23746297)

I've come to hesistently accept nested ternaries, but I try to have all lines lead with a colon. This kinda mimics a switch statement with returns.

  firstPossible ? thenThis
    : secondPossible ? thenThisOtherThing
    : thirdPossible ? thenThisThirdThing
    : defaultThing

Always fun to see how people treat ternary nesting. They still feel a bit naughty to me. The terseness is sort of unbeatable though.

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Re:Rust for JavaScript Developers – Functions and Control Flow by Kkoala on Monday July 06, 2020 @08:48AM (#23747296)

It's funny how people have so many different preferences for ternary formatting. I can't think of any other operator that would have tens of different format prefs.

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Re:Rust for JavaScript Developers – Functions and Control Flow by pests on Monday July 06, 2020 @02:11AM (#23745165)

Which is not true in PHP up until the most recent version (iirc) due to it being left associative instead of right associative you are assuming.

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Re:Rust for JavaScript Developers – Functions and Control Flow by amenod on Monday July 06, 2020 @02:11AM (#23745167)

True, or even:

    Cond1 // if this
      ? Result1 // return this
      : cond2 // else if this
        ? Result2 // return this
        : cond3 // else if this
          ? Result3 // return this
          : ResultElse // else return this

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Re:Rust for JavaScript Developers – Functions and Control Flow by giantDinosaur on Monday July 06, 2020 @05:02AM (#23745964)

Goodness me that has potential to become something truly hideous.

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Re:Rust for JavaScript Developers – Functions and Control Flow by amenod on Monday July 06, 2020 @01:11PM (#23749998)

It's actually not that bad in practice... But I guess the pragmatic formatting is "whatever `prettier` does by default" anyway. :)

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Re:Rust for JavaScript Developers – Functions and Control Flow by Kkoala on Monday July 06, 2020 @08:46AM (#23747285)

It's funny how people have so many different preferences for ternary formatting. I can't think of any other operator that would have tens of different format prefs.

[ Parent | on HN ]