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Top Forums Shell Programming and Scripting Perl command line option '-n','-p' and multiple files: can it know a file name of a printed line? Post 302998399 by RudiC on Wednesday 31st of May 2017 12:56:42 PM
Old 05-31-2017
Yes, but:
fl[0-9] (called "Pathname Expansion / Pattern Matching") expands to EXISTING files that match the pattern, fl{0..9} (called "Brace Expansion") yields all strings unconditionally:
Code:
echo file[0-9]
file1 file2 file3 file4
echo file{0..9}
file0 file1 file2 file3 file4 file5 file6 file7 file8 file9

Guess which of those exist in my PWD? Both methods do have their applications.
This User Gave Thanks to RudiC For This Post:
 

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DIFF3(1)						      General Commands Manual							  DIFF3(1)

NAME
diff3 - 3-way differential file comparison SYNOPSIS
diff3 [ -ex3 ] file1 file2 file3 DESCRIPTION
Diff3 compares three versions of a file, and publishes disagreeing ranges of text flagged with these codes: ==== all three files differ ====1 file1 is different ====2 file2 is different ====3 file3 is different The type of change suffered in converting a given range of a given file to some other is indicated in one of these ways: f : n1 a Text is to be appended after line number n1 in file f, where f = 1, 2, or 3. f : n1 , n2 c Text is to be changed in the range line n1 to line n2. If n1 = n2, the range may be abbreviated to n1. The original contents of the range follows immediately after a c indication. When the contents of two files are identical, the contents of the lower-numbered file is suppressed. Under the -e option, diff3 publishes a script for the editor ed that will incorporate into file1 all changes between file2 and file3, i.e. the changes that normally would be flagged ==== and ====3. Option -x (-3) produces a script to incorporate only changes flagged ==== (====3). The following command will apply the resulting script to `file1'. (cat script; echo '1,$p') | ed - file1 FILES
/tmp/d3????? /usr/lib/diff3 SEE ALSO
diff(1) BUGS
Text lines that consist of a single `.' will defeat -e. Files longer than 64K bytes won't work. DIFF3(1)
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