How do I specify “the word under the cursor” on VIM's commandline?

Question

I want to write a command that specifies \"the word under the cursor\" in VIM. For instance, let\'s say I have the cursor on a word and I make it appear twice. For instance, i

Answer 1

is the word under the cursor (:help ).

Sorry, I should have been more complete in this answer.

You can nmap a command to it, or this series of keystrokes for the lazy will work:

b #go to beginning of current word
yw #yank to register

Then, when you are typing in your pattern you can hit 0 which will paste in your command the contents of the 0-th register.

You can also make a command for this like:

:nmap w :s/\(=expand("")\)/

Which will map hitting '\' and 'w' at the same time to replace your command line with

:s/\(\)/