Exercício de Máscara - Referente so Gist https://gist.github.com/1182380

mascara.rb

#######################################
# EXERCÍCIO PARA MÁSCARA
# PROGRAMADOR: YUGI
# DATA: 28/03/2011
####################################### 
#
# Deve completar a máscara de acordo com o número informado
#

=begin
mask("125")
=> "00012-500"

mask("385002")
=> "38500-200"

mask("38500201")
=> "38500-201" }

mask("2950")
=> "00295-000"

mask("22923")
=> "02292-300"

mask("7603725")
=> "76037-250"
=end

def mask(valor)
	
	tam = valor.length
	sep = "-"
	retorno = ""
	
	if tam < 3 || tam > 8
		puts "Parâmetro Inválido!"
		return retorno
	elsif tam == 8
		retorno = valor[0,5] + sep + valor[5,3]
	elsif tam == 7
		valor = valor + "0"
		retorno = valor[0,5] + sep + valor[5,3]
	elsif tam == 6
		valor = valor + "00"
		retorno = valor[0,5] + sep + valor[5,3]
	elsif tam == 5
		valor = "0" + valor + "00"
		retorno = valor[0,5] + sep + valor[5,3]
	elsif tam == 4
		valor = "00" + valor + "00"
		retorno = valor[0,5] + sep + valor[5,3]
	elsif tam == 3
		valor = "000" + valor + "00"
		retorno = valor[0,5] + sep + valor[5,3]
	end

	puts retorno
	return retorno

end

# =======================================================================================

mask("12")
mask("123456789")
mask("125")
mask("385002")
mask("38500201")
mask("2950")
mask("22923")
mask("7603725")
mask("12345678")