Re: Resetting working files

[Aaron Gray <aaronngray.lists@googlemail.com>]

2009/5/31 bill lam <cbill.lam@gmail.com>
>
> On Sun, 31 May 2009, Peter Baumann wrote:
> >       echo modified >> a.txt
> >       git add a.txt
> >       git checkout -- a.txt           (1)
> >
> >       git checkout HEAD -- a.txt      (2)
> >
> >
> > (1) This will do nothing to your file 'a.txt' in your workdir because
> >     the index and the workdir are identical
> >
> > (2) This will reset your file to the state before you run that bogus
> >     echo modified >> a.txt   comand
>
> I still do not understand what index is.
> 1. is index an replica of the committed tree
> 2. is index only transient in that its content will be reset once
>   committed?
> 3. or other ?

I think index is HEAD or a revision hash. Am I correct ?

Aaron