When I woke up this morning, I couldn't image how amazing today would be.
match() function to do it.
After I sent him the solution, he thanked me. I was very happy. I didn't know a simple thing to me may help someone. I am still happy know.
I also asked him whether I could the code for my tutorial. He was very generous to say I could.
I realized that something that is simple and easy to us could be useful to someone. We can be helpful to our family, friends, neighbors or strangers. We just need to be open to share what we know.