Write a recursive function for generating all permutations of an input string. Return them as a set. If we're making all permutations for "cat," we take all permutations for "ca" and then put "t" in ...

"* Every time we put a new letter in position i, we then had to find all the possible combinations at position i+1 – this was the recursive call that we made. How do we know when to save a string?

A recursive approach (which is what I would use) would involve breaking the problem into isomorphic subproblems: to find all permutations of a string, find all permutations of the string without a ...

Recursion and loops complement each other in Python tasks. This should not be a choice to make based on one particular problem at hand but a decision that should take into consideration the specific ...

The computer performs those instructions line-by-line. However, some instructions may be repetitive with a common pattern. Recursion or iteration helps one to write a few lines of codes to perform ...