3 Mental Models For Ruby Enumerators

I love to collect mental models. These give me a lens (sometimes several!) for thinking about a given type of problem. For example, thinking of reduce as a tool to scale a method that combines 2 items to a method that combines n items helps me simplify complex reduce functions.Ruby’s Enumerator (the class, NOT the Enumerable module!) can be a bit tricky to wrap your head around. Here are 3 different mental models I have for it:.