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For challenges involving the manipulation of integers.
2
votes
Implement an Over function
Racket, 30 bytes
(λ(f g x)(apply g (map f x)))
Try it online!
Takes a and b as a list i.e. '(a b).
5
votes
Cops: The Hidden OEIS Substring
Pyret, sequence A083420, Cracked
fold({(b,e):(2 * b) + 1},1,[list: ])
The hidden string has 4 bytes or fewer.
2
votes
iHateOddNumbers
Racket, 29 bytes
(λ(x)(/ x(modulo(add1 x)2)))
Try it online!