This is my big problem when I'm working in Ruby or JS and it's someone else's code. Every time I look at a new function I have no clue what the parameters actu

This is my big problem when I'm working in Ruby or JS and it's someone else's code. Every time I look at a new function I have no clue what the parameters actually are without spelunking around to figure it out. I always feel like I'm wading through a big grey morass with no discernible form.