Method: String#tr!

Defined in:
lib/jcode.rb

#tr!(from, to) ⇒ Object 



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# File 'lib/jcode.rb', line 133

def tr!(from, to)
  return nil if from == ""
  return self.delete!(from) if to == ""

  pattern = TrPatternCache[from] ||= /[#{_regex_quote(from)}]/
  if from[0] == ?^
    last = /.$/.match(to)[0]
    self.gsub!(pattern, last)
  else
    h = HashCache[from + "1-0" + to] ||= expand_ch_hash(from, to)
    self.gsub!(pattern) do |c| h[c] end
  end
end