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Below I am logging on the monitor of Android Studio in JAVA a short phrase using conditional or ternary operator (?)en. Look at:
Log.wtf(GOT, (valirianSteel == 0 && glassOfDragon==0) ? "Run!" : "Run too!");
What would be equivalent to the conditional or ternary operator in Kotlin?
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Kotlin has no ternary operator but a if can return a value (i.e., it is treated as an expression) and function in the same way, with the detail is you are bound to have a block else. As stated in documentation:
In Kotlin, if is an Expression, i.e. it Returns a value. Therefore there is no Ternary Operator (condition ? then : Else), because ordinary if Works fine in this role.
If any of the blocks has more than one instruction the last one will be considered the return.
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There are no proper ternary expressions in Kotlin (until the current version).
I think the closest thing to the ternary in Kotlin would be this:
val max = if (a > b) a else b
There are also other described implementations in that question of SOEN.
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In Kotlin these structures are used as expressions tb:
Log.wtf(GOT, if(valirianSteel == 0 && glassOfDragon==0) "Run!" else "Run too!");
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Just to complement, in version 1.1 came the extension takeIf, that along with Lvis Perator (?:) may contribute in that event.
Your expression would be:
Log.wtf(GOT, "Run!".takeIf { valirianSteel == 0 && glassOfDragon==0 } ?: "Run too!")
It’s a little different than usual if you’re tired of the standard if/Else.
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