Question

I saw this same question for VIM and it has been something that I myself wanted to know how to do for Emacs. In ReSharper I use CTRL-D for this action. What is the least number of commands to perform this in Emacs?

Answer 1

I use

C-a C-SPACE C-n M-w C-y 

which breaks down to

• C-a: move cursor to start of line
• C-SPACE: begin a selection (‘set mark’)
• C-n: move cursor to next line
• M-w: copy region
• C-y: paste (‘yank’)

The aforementioned

C-a C-k C-k C-y C-y 

amounts to the same thing (TMTOWTDI)

• C-a: move cursor to start of line
• C-k: cut (‘kill’) the line
• C-k: cut the newline
• C-y: paste (‘yank’) (we’re back at square one)
• C-y: paste again (now we’ve got two copies of the line)

These are both embarrassingly verbose compared to C-d in your editor, but in Emacs there’s always a customization. C-d is bound to delete-char by default, so how about C-c C-d? Just add the following to your .emacs:

(global-set-key '\C-c\C-d' '\C-a\C- \C-n\M-w\C-y') 

(@Nathan’s elisp version is probably preferable, because it won’t break if any of the key bindings are changed.)

Beware: some Emacs modes may reclaim C-c C-d to do something else.