Vim

Execute Current File using Preset Key

To make vi execute a script that is being edited using a function key (in this case, F5), add the following to your .vimrc

" Mapping F5 to run hashbang scripts
au BufEnter * if match( getline(1) , '^\#!') == 0 |
\ execute("let b:interpreter = getline(1)[2:]") |
\endif

fun! CallInterpreter()
    if exists("b:interpreter")
         exec ("w") # Save
         exec ("!".b:interpreter." %") # Then run
    endif
endfun

map <F5> :call CallInterpreter()<CR>

Toggle Line Numbers

To make vi toggle line numbers using a key (in this case, F4), add the following to your .vimrc

" Map F4 to toggle line numbers
map <F4> :set nonumber!<CR>