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# File 'lib/faker_credit_card/generator.rb', line 4
def generate_number(prefix, max_length)
ccnum = prefix.to_s
while ccnum.size < (max_length - 1)
ccnum += Random.rand(10).to_s
end
sum = 0
reversed_ccnum = ccnum.reverse
reversed_ccnum.size.times.each do |index|
if index.odd?
sum += reversed_ccnum[index].to_i
else
double = reversed_ccnum[index].to_i * 2
double.fdiv(10).to_s.split(".").each do |n|
sum += n.to_i
end
end
end
mod = sum % 10
check_digit = mod.zero? ? mod : (10 - mod)
ccnum += check_digit.to_s
end
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