Course of Raku / Addendum 🆕 / Flow and functions / Subroutines and functional style / Exercises

Compose two functions

Problem

Write a subroutine compose that takes two functions and returns a new function applying them one after the other — first the second, then the first. Compose “double” with “add one”, then call the result on 5 (giving 12).

Example

The program prints:

12

Solution

✅ See the solution

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