I believe the reason your code doesn't do what you want is that kannelComment is probably an immutable list stored in a val. If you make it a mutable list, your code should work, except that you probably want to declare it as List[String](). Another option might be to use a var instead of a val and reassign kannelComment by using += instead of +. Here's the idea:
var kannelComment = List[String]()
for(line <-list)
kannelComment += "#" + line
An easier solution might be this:
val kannelComment = for (line <- list) yield "#" + line
Bill
On Mon, Oct 12, 2009 at 10:12 AM, ammarz
<mwaggef.3la.janb@...> wrote:
I wanted to do a small program in Scala that does the following:
Takes a string, and for each line prepend "#" (hash) to the line
I wanted to do as functional as possible but I didn't know how.
I wrote the following and it didnt work:
val kannelComment = List()
for(line <-list)
kannelComment + ("#" line)
where list is a list of Strings.
Could anybody help?
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