Sleepzy@feddit.it to Programmer Humor@lemmy.ml · 1 年前Elvisfeddit.itexternal-linkmessage-square33fedilinkarrow-up1156arrow-down111
arrow-up1145arrow-down1external-linkElvisfeddit.itSleepzy@feddit.it to Programmer Humor@lemmy.ml · 1 年前message-square33fedilink
minus-squarebl4kers@lemmy.mllinkfedilinkEnglisharrow-up14·1 年前I don’t understand this. Small brained users rise up
minus-squareQuazarOmega@lemy.lollinkfedilinkarrow-up13·1 年前On the left you have Elvis Presley, while on the right there’s the so-called Elvis operator
minus-squareThe Cuuuuube@beehaw.orglinkfedilinkEnglisharrow-up16·1 年前been programming since 2008. the fuck is an elvis operator?
minus-squareJerkface (any/all)@lemmy.calinkfedilinkEnglisharrow-up8·1 年前Been programming since the 80s, ditto.
minus-squareThe Cuuuuube@beehaw.orglinkfedilinkEnglisharrow-up4·1 年前gotacha. 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-up8·1 年前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 ? $thing_that_could_be_truthy : 'fallback value'; The condition is also the value if it is truthy
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up3·edit-21 年前It’s a shorthand for writing this: variable = if (input != null) input else default This is equivalent: variable = input ?: default The answers confusing it with the ternary operator are wrong.
minus-squareAVincentInSpace@pawb.sociallinkfedilinkEnglisharrow-up3·1 年前why would you call it anything other than the ternary operator
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up3·edit-21 年前Because it’s not one. Ternary operator is A ? B : C, Elvis operator is A ?: B. The same two characters are involved, but both the syntax and effect is different.
minus-squareAVincentInSpace@pawb.sociallinkfedilinkEnglisharrow-up2·1 年前The second one isn’t valid syntax in any programming language I’m familiar with. What does it do?
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up4·1 年前It’s a shorthand for writing this: variable = if (input != null) input else default This is equivalent: variable = input ?: default
minus-squaredev_null@lemmy.mllinkfedilinkarrow-up2·edit-21 年前It’s in Kotlin and some other languages. C# has it but there it’s actually A ?? B.
minus-squareQuazarOmega@lemy.lollinkfedilinkarrow-up2·1 年前Read further down on my other comment to understand, it’s just how the operator looks
I don’t understand this. Small brained users rise up
On the left you have Elvis Presley, while on the right there’s the so-called Elvis operator
been programming since 2008. the fuck is an elvis operator?
Been programming since the 80s, ditto.
Ternary if?then:else
gotacha. i’ve only ever heard them called ternaries. maybe i’m old. maybe i’m too young. definitely one of the two
It specifically refers to this shorthand
?:that works like this:$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.
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