philnash ( philnash@programming.dev ) to JavaScript@programming.devEnglish · 3 years agoStop nesting ternaries in JavaScriptwww.sonarsource.comexternal-linkmessage-square25linkfedilinkarrow-up126
arrow-up126external-linkStop nesting ternaries in JavaScriptwww.sonarsource.comphilnash ( philnash@programming.dev ) to JavaScript@programming.devEnglish · 3 years agomessage-square25linkfedilink
minus-squarespartanatreyu ( spartanatreyu@programming.dev ) linkfedilinkarrow-up10·3 years agoPretty sure they meant match as in pattern matching, not switch as in switch/case/break. You can see the proposal here: https://github.com/tc39/proposal-pattern-matching
minus-squareCameronDev ( CameronDev@programming.dev ) linkfedilinkarrow-up3·3 years agoYour probably right, that looks quite desirable.
minus-squaresnowe ( snowe@programming.dev ) linkfedilinkarrow-up2·3 years agothey also said switch expressions, which indicates they want the switch statement to be settable directly to a variable with whatever the return type of the switch is.
minus-squarespartanatreyu ( spartanatreyu@programming.dev ) linkfedilinkarrow-up2·3 years agoMatch already returns the value which can be thrown into a variable.
minus-squareJakenVeina ( JakenVeina@lemm.ee ) linkfedilinkarrow-up1·3 years agoNah, I meant switch, as that’s what it’s called in C#-land. See above. That proposal for matching looks interesting, but not quite the same, no.
minus-squarespartanatreyu ( spartanatreyu@programming.dev ) linkfedilinkarrow-up4·3 years agoAre you sure? Your C# example: var output = input switch { null => "Null", 0 => "Zero", > 0 => "Positive", _ => "Negative" }; JS proposal for match: const output = match input { when null: "Null"; when 0: "Zero"; if input > 0: "Positive"; default: "Negative"; }
minus-squareJakenVeina ( JakenVeina@lemm.ee ) linkfedilinkarrow-up1·3 years agoAha, yeah, I see it now. Looking forward to it.
Pretty sure they meant
matchas in pattern matching, notswitchas in switch/case/break.You can see the proposal here: https://github.com/tc39/proposal-pattern-matching
Your probably right, that looks quite desirable.
they also said switch
expressions, which indicates they want the switch statement to be settable directly to a variable with whatever the return type of the switch is.Match already returns the value which can be thrown into a variable.
Nah, I meant switch, as that’s what it’s called in C#-land. See above.
That proposal for matching looks interesting, but not quite the same, no.
Are you sure?
Your C# example:
var output = input switch { null => "Null", 0 => "Zero", > 0 => "Positive", _ => "Negative" };JS proposal for match:
const output = match input { when null: "Null"; when 0: "Zero"; if input > 0: "Positive"; default: "Negative"; }Aha, yeah, I see it now. Looking forward to it.