Find all permutations of a string python10/6/2023 ![]() If (!string || typeof string != "string") If my final solution may return more than one “correct” element (in this case, permutations), I’ll need a place to store them before I return the complete solution.Ģ: Iterate! If I need to find all the ordered combinations of characters in a string, creating a loop to iterate through all the characters in a string seems like a decent place to start. When I see a challenge like this, my first instinct is two do two things:ġ: Make an empty array. So we’ve figured out what a permutation is, and established that (depending on the length of the string) we may be looking for a lot of them. Suddenly, this whole string-manipulation problem seems a bit more intimidating. The whole point of combination locks is that a relatively small amount of numbers can create a large enough number of ordered combinations to prohibit casual opening. However, it does not need to be an existing word, but can simply be a re-arrangement of the characters.Īn example of permutations of something other than a string would be this:įor just three colors, we can have six different permutations, or ordered combinations of those colors.Īnother example of permutations would be a combination lock: ![]() ![]() A string permutation is similar to an anagram. So every string has a number of permutations into which its characters could be re-arranged. The solution model I explore here utilizes tools and concepts that I find broadly valuable for the solution of algorithmic challenges, and methods that I find intuitive for string manipulation within Javascript.įirst things first: What is a permutation?Ī way, especially one of several possible variations, in which a set or number of things can be ordered or arranged. Note : There is more than one way to solve this problem. Why? While the task of manipulating a string may seem familiar on its surface, actually finding a complete solution requires us to handle some unexpected complexity, which provides the opportunity to utilize a recursive tree and build a bit of familiarity with the master theorem. When I sat down to solve this problem, I found it to be a great algorithm challenge. Given a string, return all permutations of the string. GitHub repo with completed solution code and test suite.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |