memoization

memoization.cs

static Func<string, string> GenerateGuidForUser = user => user + ":" + Guid.NewGuid();
static Func<string, string> GenerateGuidForUserMemoized = memo(GenerateGuidForUser);

[Fact]
public void memoization_example()
{
    GenerateGuidForUserMemoized("spongebob");// spongebob:e431b439-3397-4016-8d2e-e4629e51bf62
    GenerateGuidForUserMemoized("buzz");// buzz:50c4ee49-7d74-472c-acc8-fd0f593fccfe
    GenerateGuidForUserMemoized("spongebob");// spongebob:e431b439-3397-4016-8d2e-e4629e51bf62
}