String#remove / String#- (Ruby)

string-ex.rb

#!/usr/bin/env ruby

module StringEx
  def remove(re)
    gsub(re) {}
  end

  def wrap(w)
    "#{w[0]}#{self}#{w[-1]}"
  end

  def indent(n, s=' ')
    "#{s * n}#{self}"
  end

  alias - remove
  alias ** wrap
  alias >> indent
end


if __FILE__ == $0
  class String
    include StringEx
  end

  p "AB-C-AB" - "AB"            # => "-C-"
  p "AB-C-AB" - "C-AB"          # => "AB-"

  p "AB-BB-AB" - /^AB/          # => "-BB-AB"
  p "AB-BB-AB" - /AB$/          # => "AB-BB-"
  p "AB-BB-AB" - /AB/           # => "-BB-"

  p "hello" ** "()"             # => "(hello)"
  p "hello" ** "|"              # => "|hello|"
  p "hello" ** "{...}"          # => "{hello}"
  p "hello" ** "->"             # => "-hello>"

  p "hello" ** ['(',')']        # => "(hello)"
  p "hello" ** ['|']            # => "|hello|"
  p "hello" ** ['{',nil,'}']    # => "{hello}"
  p "hello" ** ['-','>']        # => "-hello>"

  red = ["\e[31m", "\e[m"]
  p "hello" ** red              # => "\e[31mhello\e[m"

  p "hello" >> 2                # => "  hello"
  p "hello".indent 2, ">"       # => ">>hello"
  p "hello".indent 2, "->"      # => "->->hello"
end

# vi:set ts=2 sw=2 et: