scala how to mimic a ternary operator in anonymous functions

Question

I wanted to get "a e" in the below code by trying to mimic a ternary operator, but getting below error

scala> val ab="apple"
ab: String = apple

scala> ab.toCharArray.map( x => "aeiou".indexOf(x) >= 0  )
res99: Array[Boolean] = Array(true, false, false, false, true)

scala> ab.toCharArray.map( x => "aeiou".indexOf(x) >= 0 ? x : ' ' )
<console>:1: error: identifier expected but character literal found.
ab.toCharArray.map( x => "aeiou".indexOf(x) >= 0 ? x : ' ' )
                                                       ^

scala>

You could have first a look at https://alvinalexander.com/scala/scala-ternary-operator-syntax — cchantep, Aug 31 '18 at 11:17
Possible duplicate of [Ternary Operator Similar To ?:](https://stackoverflow.com/questions/4947535/ternary-operator-similar-to) — Raman Mishra, Aug 31 '18 at 11:30

score 2 · Accepted Answer · answered Aug 31 '18 at 11:35

2

Valid Scala syntax is

ab.toCharArray.map(x => if ("aeiou".indexOf(x) >= 0) x else ' ')

On contrary

ab.chars().map(x -> "aeiou".indexOf(x) >= 0 ? x : ' ');

is Java syntax.

answered Aug 31 '18 at 11:35

Dmytro Mitin

48,194
3
28
66

Thanks Dmytro.. I got confused with Java and scala syntax.. it works. – stack0114106 Aug 31 '18 at 11:38

scala how to mimic a ternary operator in anonymous functions

1 Answers1