Ah, contains?… supposedly one of the top five FAQs re: Clojure. It does not check whether a collection contains a value; it checks whether an item could be retrieved with get or, in other words, whether a collection contains a key. This makes sense for sets (which can be thought of as making no distinction … Read more
Many algorithms will specify that duplicates are excluded. For example, the example algorithms in the MIT Algorithms book usually present examples without duplicates. It is fairly trivial to implement duplicates (either as a list at the node, or in one particular direction.) Most (that I’ve seen) specify left children as <= and right children as … Read more
One reason is that it is easy to create a set from map: s := map[int]bool{5: true, 2: true} _, ok := s[6] // check for existence s[8] = true // add element delete(s, 2) // remove element Union s_union := map[int]bool{} for k, _ := range s1{ s_union[k] = true } for k, _ … Read more
Binary tree: Tree where each node has up to two leaves 1 / \ 2 3 Binary search tree: Used for searching. A binary tree where the left child contains only nodes with values less than the parent node, and where the right child only contains nodes with values greater than or equal to the … Read more
Here’s an explanation in layman’s terms. Let’s assume you want to fill up a library with books and not just stuff them in there, but you want to be able to easily find them again when you need them. So, you decide that if the person that wants to read a book knows the title … Read more