Sleepzy@feddit.it to Programmer Humor@lemmy.ml · 13 days agoElvisfeddit.itimagemessage-square35fedilinkarrow-up1157
arrow-up1157imageElvisfeddit.itSleepzy@feddit.it to Programmer Humor@lemmy.ml · 13 days agomessage-square35fedilink
minus-squareQuazarOmega@lemy.lollinkfedilinkarrow-up14·12 days agoOn the left you have Elvis Presley, while on the right there’s the so-called Elvis operator
minus-squareThe Cuuuuube@beehaw.orglinkfedilinkEnglisharrow-up16·12 days agobeen programming since 2008. the fuck is an elvis operator?
minus-squarejerkface@lemmy.calinkfedilinkEnglisharrow-up8·12 days agoBeen programming since the 80s, ditto.
minus-squareThe Cuuuuube@beehaw.orglinkfedilinkEnglisharrow-up4·12 days agogotacha. i’ve only ever heard them called ternaries. maybe i’m old. maybe i’m too young. definitely one of the two
minus-squareQuazarOmega@lemy.lollinkfedilinkarrow-up8·12 days agoIt specifically refers to this shorthand ?: that works like this: $value = $thing_that_could_be_truthy ?: 'fallback value'; # same as $value = $thing_that_could_be_truthy ? $thing_that_could_be_truthy : 'fallback value'; The condition is also the value if it is truthy
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up3·edit-210 days agoIt’s a shorthand for writing this: variable = if (input != null) input else default This is equivalent: variable = input ?: default The answers confusing it with the ternary operator are wrong.
minus-squareAVincentInSpace@pawb.sociallinkfedilinkEnglisharrow-up3·11 days agowhy would you call it anything other than the ternary operator
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up3·edit-210 days agoBecause it’s not one. Ternary operator is A ? B : C, Elvis operator is A ?: B. The same two characters are involved, but both the syntax and effect is different.
minus-squareAVincentInSpace@pawb.sociallinkfedilinkEnglisharrow-up2·9 days agoThe second one isn’t valid syntax in any programming language I’m familiar with. What does it do?
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up4·9 days agoIt’s a shorthand for writing this: variable = if (input != null) input else default This is equivalent: variable = input ?: default
minus-squareAVincentInSpace@pawb.sociallinkfedilinkEnglisharrow-up2·edit-29 days agoHuh. Neat feature. That’s in C# I assume?
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up2·edit-29 days agoIt’s in Kotlin and some other languages. C# has it but there it’s actually A ?? B.
minus-squareQuazarOmega@lemy.lollinkfedilinkarrow-up2·11 days agoRead further down on my other comment to understand, it’s just how the operator looks
On the left you have Elvis Presley, while on the right there’s the so-called Elvis operator
been programming since 2008. the fuck is an elvis operator?
Been programming since the 80s, ditto.
Ternary if?then:else
gotacha. i’ve only ever heard them called ternaries. maybe i’m old. maybe i’m too young. definitely one of the two
It specifically refers to this shorthand
?:that works like this:$value = $thing_that_could_be_truthy ?: 'fallback value'; # same as $value = $thing_that_could_be_truthy ? $thing_that_could_be_truthy : 'fallback value';The condition is also the value if it is truthy
It’s a shorthand for writing this:
variable = if (input != null) input else defaultThis is equivalent:
variable = input ?: defaultThe answers confusing it with the ternary operator are wrong.
why would you call it anything other than the ternary operator
Because it’s not one. Ternary operator is A ? B : C, Elvis operator is A ?: B. The same two characters are involved, but both the syntax and effect is different.
The second one isn’t valid syntax in any programming language I’m familiar with. What does it do?
It’s a shorthand for writing this:
variable = if (input != null) input else defaultThis is equivalent:
variable = input ?: defaultHuh. Neat feature. That’s in C# I assume?
It’s in Kotlin and some other languages. C# has it but there it’s actually
A ?? B.Read further down on my other comment to understand, it’s just how the operator looks