Collapsed "if" loops

Syntax
#1

Hi all,

i’m trying to reproduce the collapsed “if” loops in Scala.

This is what I mean:

Collapsed “if” loop, at least as I’m tryng to reproduce the Java one:

val length : Int = 1;
val s : String = “s”;
return (length == s.length()) ? length : (length + 1);

But, using scala I get this error:

error: identifier expected but integer literal found.
return (length == s.length()) ? length : (length + 1);

So, please whch is the correct syntax of the collapsed “if” loop in scala?

Thank you.

#2

scala has no “? :” statement IMO.
you will use the if (…) else (…) syntax instead.

2 Likes
#3

You also appear to be doing a while loop here.

#4 
return if (length == s.length()) length else length + 1
1 Like
#5

On latest Scala,

scala> def f: Any = return (length == s.length()) ? length : (length + 1)
                                                                     ^
       error: not found: type +
                                                  ^
       error: value ? is not a member of Boolean

because it parses as

def f: Any = return (length.$eq$eq(s.length()).$qmark(length): $plus[length, 1.type])
#6

You do not need the return. You can let the code evaluate the expressions.

1 Like