Reversing a file?

[Chris Torek]

In article <39 at minya.UUCP> jc at minya.UUCP (John Chambers) writes:
>... g/^/m0 ...
>It's curious that when I used "1,$" instead of "g/^/", it didn't work.
>I wonder if this is a general ed failing, or if it's just here.

It is a feature.

`g/pat/cmd' applies `cmd' to each line matching `pat'---meaning each
line is examined one at a time, and if it matches, `cmd' is done.
`1,$cmd', however, applies `cmd' to the range 1,$.

It should become obvious what is going on:  The first command moves line
1 after line 0, then (what was, and here still is) line 2 after line 0,
and then moves line 3 after 0, and so forth.  The second moves all the
lines, as a single unit, to after line 0.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris at cs.umd.edu	Path:	uunet!mimsy!chris