How to split an array into a group of n elements each?

Question

What is the best way to group an array into a list of array of n elements each in c# 4.

E.g

string[] testArray = { "s1", "s2", "s3", "s4", "s5", "s6", "s7", "s8" }; 

should be split into if we take n=3.

string[] A1 = {"s1", "s2", "s3"}; string[] A2 = {"s4", "s5", "s6"}; string[] A3 = {"s7", "s8"}; 

May be a simple way using LINQ?

Answer 1

This will generate an array of string arrays having 3 elements:

int i = 0; var query = from s in testArray             let num = i++             group s by num / 3 into g             select g.ToArray(); var results = query.ToArray(); 

Answer 2

I don't think there's a great built-in method for this but you could write one like the following.

public static IEnumerable<IEnumerable<T>> GroupInto<T>(   this IEnumerable<T> source,   int count) {    using ( var e = source.GetEnumerator() ) {     while ( e.MoveNext() ) {        yield return GroupIntoHelper(e, count);     }   }     }  private static IEnumerable<T> GroupIntoHelper<T>(   IEnumerator<T> e,   int count) {    do {     yield return e.Current;     count--;   } while ( count > 0 && e.MoveNext()); }