Vim Macro on Every Line of Visual Selection

Question

I\'d like to run a macro on every line in a selection, rather than totalling up the number of lines in my head. For instance, I might write a macro to transform:

Answer 1

You can add the function below to your ~/.vimrc or simply copy it on your browser and running :@+

fun! RunMacroOverSelection(macroname)
    execute "'<,'>normal @". a:macroname
endfun
com -nargs=1 Rover :call RunMacroOverSelection()
nnoremap r :Rover

The advantage is that you can apply any macro on the visual selection. You need to give the macro letter as argument, like:

:Rover a