Doing cat with perl:

The first is simply a replacement for DOS or other systems which don't provide a cat command.

perl -p file1 file3 file14 file47 > selected.txt

[download]

The second lets you list the files to be selected in a file. Instead of listing them all, one by one, you cat the file into the command list for the perl command.

perl -p `cat selection.list` > selected.txt

[download]

If you are concatenating many files, being the restrictions of command line length, the third one uses a begin block to open the file, stuff all the names into @ARGV, replacing whatever was there before ( namely the name of the section file ), and lets the -p option output print all the files. 

perl -p -e'BEGIN{ local $/; open LIST, '<', $ARGV[0]; my @list = <LIST
+>; @ARGV = @list; }' selection.list > selected.txt

[download]

--
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In reply to Re: cat -ing Multiple files with Perl by TomDLux
in thread cat -ing Multiple files with Perl by neversaint

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