Problem Binary Search Tree, with preorder traverse. What other methods should I add? How can I improve it? class Bst […]

Problem I wrote two functions for determining leap years. (“Kabisat” means “leap year” in Indonesia.) def kabisat? y return false […]

Problem I have some embarrassingly long code which puts into words any number up into the trillions. As a newbie, […]

Problem I want to make a Ruby nested hash table class to avoid repeating ugly code and to keep my […]