BASH: reuse argument from same command

Question

I know I can reuse the first argument from the prævious command with !:1; but is it possible to reuse an already typed argument from the command currently being entered? Say I want to cp blablabla blablabla.bak (and assume there are other similarly named files in the directory); it would be nice not to have to type blablabla all over again.

Answer 1

Yes; you can use the history expansion !# to represent the current line so far:

cp blablabla !#:1.bak