public static TensorOld <TOut> Cast <TIn, TOut>(this TensorOld <TIn> t, Func <TIn, TOut> converter = null)
{
if (converter == null)
{
converter = NumericUtils.GetNumericConverter <TIn, TOut>();
}
TensorOld <TOut> result = new TensorOld <TOut>(t.ShapeDimensions.ToArray());
result.SetSpan(t.TheSpan.Select(item => converter(item)));
return(result);
}