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Brendon Butler
Brendon Butler
4,242 Points

'this.' prefix vs 'm' prefix vs nothing?

When I first learned how to program I would always use no prefixes at all mainly because I didn't know about 'this.' So if I had conflicting variables I would just have to change one of the variables.

Once I learned about 'this.' I continued to have conflicting variables, but I would just use 'this.' for member variables. I never really knew about using 'm' or 'I' or any other types of prefixes for naming conventions, just kind of stumbled across it when reading other's code.

My question is: Should I continue to use 'this.' for my member variables, or should I get in the habit of using the 'm' prefix?

1 Answer

Hey Brendon, for what it's worth, my personal opinion is that you should use whatever is clearest for you to write... and debug!

I think the "m" and "l" prefix convention is supposed to make it clearer for learners, when they aren't confident with variable scope yet. I haven't really seen this used outside of a learning environment myself.

In Java, "this." is a reference to the actual instance of the object... which is definitely a best practice to use, since it sounds like you understand variable scope.

But since you're thinking about it, and naming your variables descriptively -- you're already doing great! When you work on a larger project (with other programmers), there will probably be standards, or a "style guide" to follow.

Brendon Butler
Brendon Butler
4,242 Points

Wow, that's a really good way to look at it. Thank you for the input. :)

I do realize that everyone has there own ways to do things. And I think I'll stick with my own like you recommended. Just could get really messy and inconsistent with multiple people in a team or when different devs for a company work on improving a project.