To echo what tilly said, don't use 'flag' for a variable name unless you're talking about a square or rectangle of cloth. Why not something more interesting like $seenJunkYet instead?
I'd rather go for something like
# Skip header junk
last if /end of header junk/;
# Start processing real data
# But quit if we see junk starting up again
last if /start of trailer junk/;
# Do useful stuff here
That way there aren't any flag variables. It's more lines of code, but it reads more easily.
Alex / talexb / Toronto
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