Re: Cutting last word from a output line

To get only the last word of a commands output:

my ($variable) = `echo $line` =~ /(\w+)$/;
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The parentheses around $variable enforce list context, which assigns the only pattern match of /(\w+)$/ (which is the last word of the command output) to $variable instead of just evaluating whether the string matches that pattern.

Had the parentheses been omitted, $variable would contain 1 if there were any words at the end of your commmands output and 0 otherwise.

If you want to actually remove the last word from a string, you can use regex substitution and capture the match:

my $output = `echo $line`;
$output =~ s/(\w+)$//;
my $last_word = $1;
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The last word gets captured into the $1 variable replaced with an empty string (i.e. removed).

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Re^2: Cutting last word from a output line by Bharath.M.R (Initiate) on Feb 28, 2015 at 09:44 UTC
Hi Experts, First of all i want thank all and i am glad to be a part this forum. Thanks for the very quick response. My query is slightly different [not echoing a line , a command instead], sorry i posted slightly different. my requirement is like below. When i give a command like below , sysname =`snmpwalk.pl -c $string -t 100 + -r 2 $ipa +ddress sysName \|awk '{print $NF}' [download] I get a output like below. `sysName.0 : OCTET STRING- (ascii): USWLS-P-TR03-C4510RE-1.adagnet.net` [download] in that i want last word that is "USWLS-P-TR03-C4510RE-1.adagnet.net" to be assigned to a variable.	[reply] [d/l] [select]
Re^3: Cutting last word from a output line by kroach (Pilgrim) on Feb 28, 2015 at 12:31 UTC
Replace \w (word character) with \S (non-whitespace) in the regular expression and it should work. my ($variable) = `your command` =~ /(\S+)$/; [download]	[reply] [d/l]
Re^3: Cutting last word from a output line by karlgoethebier (Abbot) on Feb 28, 2015 at 15:50 UTC
I continue taking your specs literally. I assume that you: can't modify snmpwalk.pl want to set an environment variable So i jumped to the conclusion, that you need something like this: `karls-mac-mini:monks karl$ sysname=$(./snmpwalk.pl \| perl -ae 'print p +op @F') karls-mac-mini:monks karl$ echo $sysname USWLS-P-TR03-C4510RE-1.adagnet.net` [download] See also I know what I mean. Why don't you?. ~~BTW, if you are on Windows, where does your `awk` come from? Cygwin? Or do you expect a port to PowerShell?~~ Edit: Strucked out useless/annoying comment. Regards, Karl ŤThe Crux of the Biscuit is the Apostropheť	[reply] [d/l] [select]
Re^4: Cutting last word from a output line by Bharath.M.R (Initiate) on Feb 28, 2015 at 16:07 UTC
Thanks Karl, I just gave an example how i was achieving in unix shell. Ok i will try to re-phrase the question. I am expecting like below. Assume below is an system command: "snmpwalk.ovpl -c $string $IP sysName" here windows system command "snmpwalk.ovpl -c $string $IP sysName" will give me output like below. sysName.0 : OCTET STRING- (ascii): USWLS-P-TR03-C4510RE-1.adagnet.net So as said earlier i am expecting something like below.: my $variable = `system (sysName.0 : OCTET STRING- (ascii): USWLS-P-TR03-C4510RE-1.adagnet.net) \| cut last word` expected $variable=USWLS-P-TR03-C4510RE-1.adagnet.net	[reply]
Re^5: Cutting last word from a output line by karlgoethebier (Abbot) on Feb 28, 2015 at 17:26 UTC
Re^4: Cutting last word from a output line by Bharath.M.R (Initiate) on Feb 28, 2015 at 18:16 UTC
Thank you all, this is all i wanted to know :) ############################################### my $output = `nnmsnmpwalk.ovpl -u system -p manager123 -t 10 -c $Strin +g $IP sysName`; my $sysName = (split /\s/, $output)[-1]; print "system name is $sysName\n"; [download] THanks, Bharath	[reply] [d/l]
Re^5: Cutting last word from a output line by karlgoethebier (Abbot) on Feb 28, 2015 at 18:44 UTC
Re^6: Cutting last word from a output line by Bharath.M.R (Initiate) on Feb 28, 2015 at 19:43 UTC
Some notes below your chosen depth have not been shown here
Re^3: Cutting last word from a output line by Bharath.M.R (Initiate) on Feb 28, 2015 at 10:21 UTC
I am running on winodws platform.	[reply]