Specific skills don't matter much, and you'll never be able to cover more than a tiny fraction of them anyway. What really makes a difference is basic problem

Specific skills don't matter much, and you'll never be able to cover more than a tiny fraction of them anyway. What really makes a difference is basic problem solving and logical reasoning. For just about any specific task google will give you some code samples, but if you can't form a consistent mental model of what the computer will do with that code, you won't be able to use it effectively. Regular expressions are just an implementation detail.