Macro for making numbered lists in vim?

Question

Often times it seems I have a list of items, and I need to add numbers in front of them. For example:

Item one
Item two
Item three

Which shoul

Answer 1

Select your lines in visual mode with: V, then type:

:'<,'>s/^\s*\zs/\=(line('.') - line("'<")+1).'. '

Which is easy to put in a command:

command! -nargs=0 -range=% Number ,s/^\s*\zs/\=(line('.') - +1).'. '