Repeating the last ‘:’ (Ex) command in Vim

Sometimes I run a complicated search-and-replace (:s/../../) in Vim, and I then want to repeat it somewhere else. In the past, I have always hit :, up-arrow to retrieve the command from the history. It should be no surprise by now that there is an easier way!

@: in normal mode (at-sign, colon) will repeat the last : command. Once you have done @:, you can hit @@ to re-run the command. Quick and easy!

This works because the : register, ":, holds the last Ex command. @ runs a macro, and knows that using the : register means you want to repeat an Ex command. @@ runs the last macro, so works for @: just as it does for @a or any other normal-mode macro.

I found ": in :help registers when I was looking for a register that held the filename of the file open in another window, as opposed to the alternate filename in the current window. Details of ": are at :help ": (believe it or not! 😉 ).

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