Validate International Securities Identification Number: Difference between revisions

The luhn test is repeated here for simplicity (from Luhn_test_of_credit_card_numbers#langur).

 

<lang langur>val .luhntest = f(.s) {

val .t = [0, 2, 4, 6, 8, 1, 3, 5, 7, 9]

return false

}

 

# used unbounded lists on join(), map(), and split()...

# ... and implied parameters and a single expression on the anonymous function

}