Take groups of 5 strings from List [duplicate]

Question

I have a List<string> and I want to take groups of 5 items from it. There are no keys or anything simple to group by...but it WILL always be a multiple of 5.

e.g.

{"A","16","49","FRED","AD","17","17","17","FRED","8","B","22","22","107","64"}

Take groups of:

"A","16","49","FRED","AD"
"17","17","17","FRED","8"
"B","22","22","107","64"

but I can't work out a simple way to do it!

Pretty sure it can be done with enumeration and Take(5)...

Answer 1

You can use the integer division trick:

List<List<string>> groupsOf5 = list
    .Select((str, index) => new { str, index })
    .GroupBy(x => x.index / 5)
    .Select(g => g.Select(x => x.str).ToList())
    .ToList();

Answer 2

 List<List<string>> result = new List<List<string>>();
 for(int i = 0; i < source.Count; i += 5 )
      result.Add(source.Skip(i).Take(5).ToList());

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