Jean-Christophe jcberthon

## string_ext.rb
class String
  def to_boolean
    return true   if self == true   || self =~ (/(true|t|yes|y|1)$/i)
    return false  if self == false  || self.nil? || self.empty? || self =~ (/(false|f|no|n|0)$/i)
    raise ArgumentError.new("invalid value for Boolean: \"#{self}\"")
  end
end

## docker-img-gc
docker images --quiet --filter=dangling=true | xargs --no-run-if-empty docker rmi
	class String
	def to_boolean
	return true if self == true \|\| self =~ (/(true\|t\|yes\|y\|1)$/i)
	return false if self == false \|\| self.nil? \|\| self.empty? \|\| self =~ (/(false\|f\|no\|n\|0)$/i)
	raise ArgumentError.new("invalid value for Boolean: \"#{self}\"")
	end
	end