Bubble Foundry

Fun with Scala Implicits

by Peter.

Last night I discovered that Scala’s RichString has a format method quite similar to  Python’s. However, in Python I’m used to using the % operator and I wondered if I could use the same syntax in Scala. With a little library pimping and help from my friends on Stack Overflow, I can:

class BFString(s: String) {
  def %(in: Any*) = s.format(in: _*)
implicit def add_%(s: String) = new BFString(s)
scala> "The %s costs $%d." % ("dog", 255)
res2: String = The dog costs $255.

Pretty cool!