Getting the size of a tuple (number of items)
Yesterday was a trip to the world of tuples and reflection and today I’m going to continue on that note. As previously, I needed something with tuples for FbNetExternalEngine – number of elements in whole tuple. I call it “size of tuple”.
The idea isn’t difficult at all. In fact, I consider it pretty good example for recursion. First, I assume the tuple is “the tuple” in a sense from yesterday’s code. Then it’s just checking number of generic parameters, if it’s 8, then taking the last one and repeating the process.
public static int GetSize(Type tuple)
{
var genericArguments = tuple.GetGenericArguments();
if (genericArguments.Length > 7)
{
return 7 + GetSize(genericArguments[7]);
}
else
{
return genericArguments.Length;
}
}
And some tests to sleep better.
[TestCase(typeof((int, int)), ExpectedResult = 2)]
[TestCase(typeof((int, int, string, string, int, int, string, string, int, int)), ExpectedResult = 10)]
[TestCase(typeof(ValueTuple<int>), ExpectedResult = 1)]
[TestCase(typeof(ValueTuple<int, ValueTuple<int, int>>), ExpectedResult = 2)]
public int GetSizeTest(Type tuple)
{
return TupleHelper.GetSize(tuple);
}
I opted for slightly longer code but more readable code, instead of having it on just two lines.
