Hi,
I wrote:
> $ scan -width 0 -format '%(msg) %(decode{subject})' +. |
> > awk '{m=$1; sub(/[^ ]* /, "", $0)} NR>1 && $0==l {print m} {l=$0}'
> 2
> 3
> $
>
> And that one-line awk above, as I originally wrote it, re-formatted to
> be a usable script, i.e. chmod +x, is
>
> #! /usr/bin/awk -f
>
> { m = $1; sub(/[^ ]* /, "", $0) }
> NR > 1 && $0 == l { print m }
> { l = $0 }
>
> It would be interesting to see the length of a functionally equivalent
> Python version as a lot of what awk makes implicit is tedious code in
> many other languages and requires much more comprehension for
> non-programmers, e.g. method functions of an object, context objects,
> etc.
#! /usr/bin/python
import sys
paths = sys.argv[1:]
if not paths:
paths = ['/dev/stdin']
nr = 0
for path in paths:
with open(path) as f:
for l in f:
nr += 1
m, l = l.split(' ', 1)
if nr > 1 and l == prev:
print(m)
prev = l
--
Cheers, Ralph.
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