Is it possible to call a class member method in its own constructor?

I tried but it seems to want me to make an object in order to access class member methods, but then it gets messy.

I'm making all the methods member methods, I have easy access to the class's assets such as a vector. I would like to call some methods like checkRange(), or eraseDupes() in the constructor?

My only alternative that I can think of so far is to code the functions into the constructor -- which isn't clean, and not reusable, but that' what I did for now to make this work...

Thanks in advance!