Re: Resetting working files

2009/5/31 bill lam [off-list ref]

On Sun, 31 May 2009, Peter Baumann wrote:

quoted

      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