When using Vim, I want to keep keystrokes to a minimum and my focus on the current terminal window. While using Ruby I found that saving a file, flipping to a different terminal window, executing specs and flipping back was taking too much effort.
All the above steps can be solved by simply mapping a keystroke. For example, when in Normal mode I can now save the file and execute RSpec by hitting the comma key.
:nmap , :w | !rspec --colour %
The format is fairly straight forward.
:nmap == Map a key for normal mode
, == key you want to map
:w == save file
| == join multiple commands forward
!rspec == execute RSpec
% == current file
With it being this fast to map keys, if you find yourself typing too much then you can speed up your productivity with a few simply mappings based on your current context.