It was this sentence:

kalamiti: I know both works but get lost on wich to choose

I felt that kalamiti was not really sure about what s/// and tr/// do, since they both were not doing the same thing in the code, and decided that adding some more documentation to your post (which was already the highest-voted node at the time) would be a good idea.

Abigail-II: The post of the OP clearly suggest to me that the OP knows what tr/// and s/// do.

I didn't get the same impression.