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replace.scala #
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import java.util.regex.Matcher
class MyString (s:String) {
	def replace (source:String, replace:(Matcher => String)) = {
		val m = source.r.pattern.matcher(s)
		val sb = new StringBuffer(32)
		while (m.find) {
			m.appendReplacement(sb, replace(m))
		}
		m.appendTail(sb)
		sb.toString
	}
}
implicit def str2mystr (s:String) = new MyString(s)