Divide a large IEnumerable into smaller IEnumerable of a fix amount of item

Question

In order to support an API that only accepts a specific amount of items (5 items), I want to transform a LINQ result into smaller groups of items that always contain that se

Answer 1

One easy possibility is to use the Enumerable.Skip and Enumerable.Take methods, for example:

List nums = new List(){1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18};

var list1 = nums.Take(5);
var list2 = nums.Skip(5).Take(5);
var list3 = nums.Skip(10).Take(5);
var list4 = nums.Skip(15).Take(5);

As Jon mentioned in the comments though, a simple approach like this one will re-evaluate nums (in this example) each time, which will impact performance (depending on the size of the collection).