Print lines present in first that match second variable. And ones that does not exist in second. Post: 302980536

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Top Forums Shell Programming and Scripting Print lines present in first that match second variable. And ones that does not exist in second. Post 302980536 by Don Cragun on Monday 29th of August 2016 10:47:52 PM

08-29-2016

Registered User

I am not trying to rub anything in. The way we learn how to do things is to try to do it on our own. Then, if we get stuck, ask for help figuring out what doesn't work. Or, if we get something that works, but would like to make it more portable, more efficient, or faster; ask for suggestions for improvements. Study the suggestions you get. If you don't understand how or why it works, look at the manual page on your system for that utility and try to figure it out again. If you still don't understand, ask for an explanation describing how the code you don't understand works.

If you don't try to do something on your own before asking for a solution from someone else, you'll never learn how to do it on yourself. We are here to help you learn how to solve problems; not to act as your unpaid programming staff.

And, it is always a good idea to tell us what operating system and shell you're using. Many utilities have different options and capabilities on different systems. And various shells have various extensions to the features required by the standards.

On a slightly different, but very closely related, topic: How would you approach this problem if the strings you were comparing were in files instead of in shell variables?

And, with the shell you are using, what is the difference between the results produced by the three commands:

Code:

var1="""
Custom JAX-RS
Custom Shared
Web 2.0
"""

var1="
Custom JAX-RS
Custom Shared
Web 2.0
"

var1='
Custom JAX-RS
Custom Shared
Web 2.0
'

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LEARN ABOUT DEBIAN

struct::compare

Compare(3pm)						User Contributed Perl Documentation					      Compare(3pm)

NAME

       Struct::Compare - Recursive diff for perl structures.

SYNOPSIS

	   use Struct::Compare;
	   my $is_different = compare($ref1, $ref2);

DESCRIPTION

       Compares two values of any type and structure and returns true if they are the same. It does a deep comparison of the structures, so a hash
       of a hash of a whatever will be compared correctly.

       This is especially useful for writing unit tests for your modules!

PUBLIC FUNCTIONS

       o   $bool = compare($var1, $var2)

	   Recursively compares $var1 to $var2, returning false if either structure is different than the other at any point. If both are
	   undefined, it returns true as well, because that is considered equal.

BUGS
/NEEDED ENHANCEMENTS
       o   blessed references

	   compare currently does not deal with blessed references. I need to look into how to deal with this.

LICENSE

       (The MIT License)

       Copyright (c) 2001 Ryan Davis, Zen Spider Software

       Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the
       "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish,
       distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to
       the following conditions:

       The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

       THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
       MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
       CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
       SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

AUTHOR

       Ryan Davis <ryand-cmp@zenspider.com> Zen Spider Software <http://www.zenspider.com/ZSS/>

perl v5.12.4							    2011-07-04							      Compare(3pm)

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