/// <summary>
/// Gets the index of the key in the array.
/// </summary>
/// <param name="key">The key to search for.</param>
/// <returns>The index of the key if found; -1 otherwise.</returns>
private int IndexOfObject(object key)
{
Util.EquivPred ep = Util.GetEquivPred(key);
for (int i = 0; i < _array.Length; i += 2)
{
if (ep(key, _array[i]))
{
return(i);
}
}
return(-1);
}
