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Code Kata: Combination Lockλ︎

An exercise to become more comfortable with the concept of List Comprehension

Lisp comprehension

In Clojure, list comprehension is via the for function

Note::Generate all the combinations for a lock with 3 combination tumblersλ︎

Each combination is made up of three numbers (the tumblers). Each number is between 0 and 9

The range function can generate a sequence of numbers, so could be used to create each tumbler.

Combinations can be returned as a collection, eg. a vector.

(for [tumbler-1 (range 10)
      tumbler-2 (range 10)
      tumbler-3 (range 10)]
 [tumbler-1 tumbler-2 tumbler-3])

Alternative Exercisesλ︎

Here are some exercises that could also be solved with list comprehension

  • Fizzbuzz