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IBAN: Difference between revisions
→Ruby: Add implementation
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=={{header|Ruby}}==
<lang Ruby>def valid_iban? iban
len = {
AL: 28, AD: 24, AT: 20, AZ: 28, BE: 16, BH: 22, BA: 20, BR: 29,
BG: 22, CR: 21, HR: 21, CY: 28, CZ: 24, DK: 18, DO: 28, EE: 20,
FO: 18, FI: 18, FR: 27, GE: 22, DE: 22, GI: 23, GR: 27, GL: 18,
GT: 28, HU: 28, IS: 26, IE: 22, IL: 23, IT: 27, KZ: 20, KW: 30,
LV: 21, LB: 28, LI: 21, LT: 20, LU: 20, MK: 19, MT: 31, MR: 27,
MU: 30, MC: 27, MD: 24, ME: 22, NL: 18, NO: 15, PK: 24, PS: 29,
PL: 28, PT: 25, RO: 24, SM: 27, SA: 24, RS: 22, SK: 24, SI: 19,
ES: 24, SE: 24, CH: 21, TN: 24, TR: 26, AE: 23, GB: 22, VG: 24
}
# Ensure upper alphanumeric input.
iban.delete! " \t"
return false unless iban =~ /^[\dA-Z]+$/
# Validate country code against expected length.
cc = iban[0, 2].to_sym
return false unless iban.size == len[cc]
# Shift and convert.
iban = iban[4..-1] + iban[0, 4]
iban.gsub!(/[A-Z]/) { |c| c.ord - 55 }
iban.to_i % 97 == 1
end
p valid_iban? "GB82 WEST 1234 5698 7654 32" #=> true
p valid_iban? "GB82 TEST 1234 5698 7654 32" #=> false</lang>
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