string substitution

String interpolation in Scala 2.10 and newer (String variable substitution)

Scala string FAQ: How do I embed variables in strings in Scala?

A lot of nice new features were added in Scala in version 2.10, but a simple feature that makes me happy is string interpolation. This lets Scala developers embed variables inside strings just like you can do in other languages like Perl, PHP, and Ruby -- but perhaps in an even more powerful way. (I say "perhaps" because I haven't used those other languages recently.)