How to trim ending blanks of a string?

Question

In java, I can do it with commons-lang:

StringUtils.stripEnd("  abc  \t", null) // => "  abc"

I want to know if there is any built-in method to do this in scala, or how to do it in scala without any 3rd-party dependencies?

Answer 1

You can do it with a regex:

"  string  ".replaceAll("\\s+$", "");
res0: java.lang.String = "  string"

Answer 2

Another possible way is to use method dropWhile from rich String class named StringOps

scala> val y = "   abcd   ".reverse.dropWhile(_ == ' ').reverse
y: String = "   abcd"

If you need to trim spaces from the beginning of string just remove reverse methods:

scala> val y = "   abcd   ".dropWhile(_ == ' ')
y: String = "abcd   "