How can I get the intersection, union, and subset of arrays in Ruby?
I want to create different methods for a class called Multiset. I have all the required methods, but I’m unsure of how to … Read more
intersection
How to calculate the intersection of two sets? [duplicate]
This question already has answers here: Efficiently finding the intersection of a variable number of sets of strings (8 answers) Closed 1 year … Read more
How to find list intersection?
a = [1,2,3,4,5] b = [1,3,5,6] c = a and b print c actual output: [1,3,5,6] expected output: [1,3,5] How can we achieve … Read more
Find intersection of two nested lists?
I know how to get an intersection of two flat lists: b1 = [1,2,3,4,5,9,11,15] b2 = [4,5,6,7,8] b3 = [val for val in … Read more
Simplest code for array intersection in javascript
What’s the simplest, library-free code for implementing array intersections in javascript? I want to write intersection([1,2,3], [2,3,4,5]) and get [2, 3] 37 s … Read more
Removing duplicates in lists
How do I get a new list without duplicates? [1, 2, 3, 1] → [1, 2, 3] How do I get a new … Read more
How to calculate the intersection of two sets?
Use the retainAll() method of Set: Set<String> s1; Set<String> s2; s1.retainAll(s2); // s1 now contains only elements in both sets If you want to preserve the … Read more