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Código Ruby para validação do CNS (Cartão Nacional de Saúde)
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def valid_cns?(cns) # CNS is a String | |
return false unless (cns.match('[1-2]\\d{10}00[0-1]\\d') || cns.match('[7-9]\\d{14}')) | |
return weighted_sum(cns) % 11 == 0; | |
end | |
def weighted_sum(cns) | |
total = 0 | |
cns.chars.each_with_index { |char, index| total += (char.to_i * (15 - index)) } | |
total | |
end | |
# REFs: | |
# https://integracao.esusab.ufsc.br/ledi/documentacao/regras/algoritmo_CNS.html | |
# https://gist.github.com/yanaga/3024877 |
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