Suggestion : Logic of the coding

[jauharvp]

I appreciate your Golang for hacking resource and it's really cool repo for learning go. However, I would suggest you add the logic of the code first and then code even though it's there in code as the comment, learners can grab it easily

1. Create a type for string
2. Define the method.

I really appreciate your effort on this repo.

Thank you so much for this.