How does one know what built-in methods exist in ruby?

Question

Is there a list with all the built in methods? When I have a problem someone will say something like "ruby has a built in method for that"... Well how would one know that?

Answer 1

You can check the Ruby Standard Library API or the Core API (scroll down a bit).

Both are extremely useful, especially the Core API.

For example, if you're wondering what things standard arrays can do see: The Ruby Core page On Array

Happy coding!