Simple way of taking out single arguments from ARGV if they match a given regexp

args_remove.rb

# args_remove
# Simple way of taking out single arguments from ARGV if they match
# a given regexp.
#
# by Sunny Ripert under the WTFPL
#
# Example:
#
#   if args_remove '--usage'
#     puts "Usage: app [--progress] [--verbose] [-r|--recursive] [--days=N] [--tag=X --tag=Y...] files"
#     exit 0
#   end
#
#   progress  = args_remove '--progress'
#   recursive = args_remove /^(-r|--recursive)$/
#   verbosity = args_remove('--verbose') ? :high : :low
#   days      = args_remove(/^--days=(\d+)$/) { |match| match[1].to_i } || 42
#
#   tags = []
#   while tag = args_remove(/^--tag=(\w+)$/) { |match| match[1] }
#     tags.push tag
#   end
#
#   files = ARGV

def args_remove(regexp)
  ARGV.each_with_index do |arg, key|
    if match = arg.match(regexp)
      ARGV.slice!(key)
      return block_given? ? yield(match) : true
    end
  end
  false
end