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Full Discussion: Garbage value
Top Forums Shell Programming and Scripting Garbage value Post 302560473 by Corona688 on Friday 30th of September 2011 01:00:31 AM
Old 09-30-2011
I can't tell what you're trying to do. Why do you have fixed strings like ACGTacgt in there?

---------- Post updated at 11:00 PM ---------- Previous update was at 10:53 PM ----------

On closer examination, I think I see part of the problem. reverse() doesn't reverse a string, it reverses a list:

Code:
# prints abcdefgh
print "abcd", "efgh", "\n";
# prints efghabcd
print reverse("abcd", "efgh"), "\n";

So your 'reversed' string is actually identical..

You appeared to have the right idea earlier with split(). It outputs a list which reverse() can use, which also outputs a list, which you can cram into join() to make it a string again.

Code:
$r=join('', reverse(split('', $s)));
if($r == $s) { ... } # Same backwards and forwards is a palindrome

 

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LINUX-VERSION(1)					      General Commands Manual						  LINUX-VERSION(1)

NAME
linux-version - operate on Linux kernel version strings SYNOPSIS
linux-version compare VERSION1 OP VERSION2 linux-version sort [--reverse] [VERSION1 VERSION2 ...] linux-version list [--paths] DESCRIPTION
linux-version operates on Linux kernel version strings as reported by uname -r and used in file and directory names. These version strings do not follow the same rules as Debian package version strings and should not be compared as such or as arbitrary strings. compare VERSION1 OP VERSION2 Compare version strings, where OP is a binary operator. linux-version returns success (zero result) if the specified condition is satisfied, and failure (nonzero result) otherwise. The valid operators are: lt le eq ne ge gt sort [--reverse] [VERSION1 VERSION2 ...] Sort the given version strings and print them in order from lowest to highest. If the --reverse option is used, print them in order from highest to lowest. If no version strings are given as arguments, the version strings will instead be read from standard input, one per line. They may be suffixed by arbitrary text after a space, which will be included in the output. This means that, for example: linux-version list --paths | linux-version sort --reverse will list the installed versions and corresponding paths in order from highest to lowest version. list [--paths] List kernel versions installed in the customary location. If the --paths option, show the corresponding path for each version. AUTHOR
linux-version and this manual page were written by Ben Hutchings as part of the Debian linux-base package. 30 March 2011 LINUX-VERSION(1)
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