finding last match in a file

Mark McEahern marklists at
Thu Sep 19 14:00:52 EDT 2002

> I have a number of very large files where I have to find the last line
> which matches a certain experssion.  Currently I'm simply opening the
> file and looping through it noteing each time a line matches and at the
> end of the loop I see which was the last match.  However this is very
> slow and inefficient.  Is there some way to read through the file
> backwards and simply find first match starting from the end of the file.
> The files are really too big to read the entire thing into memory.

Well this is worth considering:

// m


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