Scala: String Chomp

does Scala have an API to do a "chomp" on a String? Preferrably, I would like to convert a string "abcd \n" to "abcd"

Thanks Ajay开发者_Go百科

There's java.lang.String.trim(), but that also removes leading whitespace. There's also RichString.stripLineEnd, but that only removes \n and \r.

If you don't want to use Apache Commons Lang, you can roll your own, along these lines.

scala> def chomp(text: String) = text.reverse.dropWhile(" \n\r".contains(_)).reverse
chomp: (text: String)String

scala> "[" + chomp(" a b cd\r \n") + "]"
res28: java.lang.String = [ a b cd]

There is in fact an out of the box support for chomp¹

scala> val input = "abcd\n"
input: java.lang.String =
abcd


scala> "[%s]".format(input)
res2: String =
[abcd
]

scala> val chomped = input.stripLineEnd
chomped: String = abcd

scala> "[%s]".format(chomped)
res3: String = [abcd]

¹ for some definition of chomp; really same answer as sepp2k but showing how to use it on String

Why not use Apache Commons Lang and the StringUtils.chomp() function ? One of the great things about Scala is that you can leverage off existing Java libraries.