Question

I have

var previous = new BitArray(new bool[]{true}); var current = new BitArray(new bool[]{false}); 

I want to concatenate them. I have already tried:

var next = new BitArray(previous.Count + current.Count); var index = 0; for(;index < previous.Count; index++)     next[index] = previous[index]; var j = 0; for(;index < next.Count; index++, j++)     next[index] = current[j]; previous = current; 

But it doesn’t look like the best way to do it.

Answer 1

Unfortunately it looks like your method might be as good as it gets – if BitArray implemented IEnumerable<T> (instead of just IEnumerable) then we could use LINQ extension methods to make it a bit prettier.

If I were you, I’d wrap this up into an extension method on BitArray:

public static BitArray Prepend(this BitArray current, BitArray before) {     var bools = new bool[current.Count + before.Count];     before.CopyTo(bools, 0);     current.CopyTo(bools, before.Count);     return new BitArray(bools); }  public static BitArray Append(this BitArray current, BitArray after) {     var bools = new bool[current.Count + after.Count];     current.CopyTo(bools, 0);     after.CopyTo(bools, current.Count);     return new BitArray(bools); }