Is there a way to get at the manuals of Ruby functions from the command line?
Like the ?func man pages in R.
ri Array
ri Array.sort
ri Hash#each
ri Math::sqrt
Wes
I have the following shell script that I use because it does color formatting in the terminal:
wesbailey@feynman:~/insiderpages> cat `which rim`
ri -Tf ansi -w 150 $1
wesbailey@feynman:~/insiderpages> rim Array
...
来源：https://stackoverflow.com/questions/5238468/manual-pages-for-ruby-functions-from-command-line