C# Splitting An Array

Question

I need to split an array of indeterminate size, at the midpoint, into two separate arrays.

The array is generated from a list of strings using ToArray().

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Answer 1

If functional paradigm is a concern, this might help:

   public static IEnumerable<IEnumerable<T>> Split<T>(this IEnumerable<T> seq, Int32 sizeSplits) {
     Int32 numSplits = (seq.Count() / sizeSplits) + 1;
     foreach ( Int32 ns in Enumerable.Range(start: 1, count: numSplits) ) {
        (Int32 start, Int32 end) = GetIndexes(ns);
        yield return seq.Where((_, i) => (start <= i && i <= end));
     }

     (Int32 start, Int32 end) GetIndexes(Int32 numSplit) {
        Int32 indBase1 = numSplit * sizeSplits;
        Int32 start = indBase1 - sizeSplits;
        Int32 end = indBase1 - 1;
        return (start, end);
     }
  }

Answer 2

You could use the following method to split an array into 2 separate arrays

public void Split<T>(T[] array, int index, out T[] first, out T[] second) {
  first = array.Take(index).ToArray();
  second = array.Skip(index).ToArray();
}

public void SplitMidPoint<T>(T[] array, out T[] first, out T[] second) {
  Split(array, array.Length / 2, out first, out second);
}

Answer 3

If you don't have Linq, you can use Array.Copy:

public void Split(ref UList list)
{
    string[] s = list.mylist.ToArray();

    //split the array into top and bottom halfs
    string[] top = new string[s.Length / 2];
    string[] bottom = new string[s.Length - s.Length / 2];
    Array.Copy(s, top, top.Length);
    Array.Copy(s, top.Length, bottom, 0, bottom.Length);

    Console.WriteLine("Top: ");
    foreach (string item in top) Console.WriteLine(item);
    Console.WriteLine("Bottom: ");
    foreach (string item in bottom) Console.WriteLine(item);
}