03-15-2006
print the first 5 lines in which 2 files differs
it is a simple problem, but I am totally new to shell programming
There are 2 files. I have to print the 5 five lines which are different.
I appreciate any help.
10x.
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PDL2(1p) User Contributed Perl Documentation PDL2(1p)
NAME
pdl2 - Simple shell (version 2) for PDL
SYNOPSIS
Use PDL interactively:
%> pdl2
pdl> $a = sequence(10) # or any other perl or PDL command
pdl> print "$a = $a
";
$a = [0 1 2 3 4 5 6 7 8 9]
DESCRIPTION
The "pdl2" program, also known as the Perldl2 shell, is a second generation version of the original "perldl" interactive PDL shell. It
attempts to be backward compatible in usage while providing improved features, better support for Perl syntax, and an more easily extended
framework based on the Devel::REPL shell.
If you have Devel::REPL version 1.003011 or later, then "pdl2" will start with full functionality. If Devel::REPL is not installed or
found then "pdl2" will print a warning and run the legacy "perldl" shell command instead.
By default, command lines beginning with the default prompt of either "pdl2" or "perldl" (one of 'pdl> ', 'PDL> ', or 'perldl> ') will have
the prefix string and surrounding whitespace stripped. This allows for easy cut-and-paste from sample PDL shell sessions or other examples
into another PDL shell session.
FUNCTIONS
do_print
Toggle print-by-default on and off (default value: off)
By default, "pdl2" does not print the results of operations since the results can be very large (e.g., a small 640x480 RGBA image is still
more than 1_000_000 elements). However, for experimenting and debugging more complex structures, it helps to see the results of every
operation. The "do_print" routine allows you to toggle between the default "quiet" operation and a full Read, Evaluate, Loop style.
pdl> $a = pdl(3,2)
pdl> do_print
1
pdl> $a = pdl(3,2)
$PDL1 = [3 2];
pdl> do_print
pdl> $a = pdl(3,2)
VARIABLES
$PDL::toolongtoprint
The maximal size pdls to print (defaults to 10000 elements). This is not just a "perldl" or "pdl2" variable but it is something that
is usually needed in an interactive debugging session.
SEE ALSO
perldl, Devel::REPL
perl v5.14.2 2012-05-19 PDL2(1p)