Re: a one-liner for this trivial problem?

perl -ne 'BEGIN {open my $sh, "<", shift; %h = map {$_ => 1} <$sh>} print unless $h{$_}' small large

Read the small file in the BEGIN block and shift it out of @ARGV.

A minor plus of this approach is that any number of "large" files can be passed, after the "small" file.

If you have File::Slurp available:

perl -MFile::Slurp=slurp -ne 'BEGIN {%h = map {$_ => 1} slurp shift} print unless $h{$_}' small large

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Re^2: a one-liner for this trivial problem? by tbone654 (Beadle) on Aug 27, 2013 at 14:38 UTC
exclude smallfile from largefile `grep -i -v -f smallfile largefile` [download] include only smallfile from largefile `grep -i -f smallfile largefile` [download] include only smallfile from largefile in reverse order numberic by kolumn 2 `grep -i -f smallfile largefile \| sort -r -b -g -k 2` [download]	[reply] [d/l] [select]