Because it's Ruby. I've been using Ruby (in the context of Rails apps) for almost six months now, after a decade or so in mostly Python. Ruby is just "messy" i

Because it's Ruby. I've been using Ruby (in the context of Rails apps) for almost six months now, after a decade or so in mostly Python. Ruby is just "messy" in my opinion, and having the separate methods Array#select and Array#reject is just a single symptom of that. Another example is that something in Rails adds Array#fourth. I can't imagine a circumstance where using my_array.fourth is clearer than my_array[3].