Hi ,
Can anybody explain how this perl one liner works..
It is to test whether the number is prime or not
perl -le 'print "PRIME" if (1 x shift) !~ /^(11+)\1+$/' 19
Thanks in advance
Shihab (2 Replies)
Hi
I need a perl onliner to delete a line in a file starting with few words.
Example
file.txt
----------
my name is don
I live in London
I am woking as engineer
I want to delete a line starting with 'I live in' using perl oneliner and in place edit with out temporary files
Thanks... (2 Replies)
Hi all!
How can a file be rid of three lines in sequence like the sample below:
...
</s>
<s>
<w></w>
</s>
<s>
...to get:
...
</s>
<s>
...
Note that the digits between square brackets may be more than one, comprising a comma, or a full-stop; and that the string between brackets... (1 Reply)
Thanks for giving your time and effort to answer questions and helping newbies like me understand awk.
I have a huge file, millions of lines, so perl takes quite a bit of time, I'd like to convert these perl one liners to awk.
Basically I'd like all lines with ISA sandwiched between... (9 Replies)
can someone help me translate the following command, from:
/usr/bin/awk "/^$TOFDAYM $TOFDAYD /,0" $LOGFILE
to something like
perl -e .....
basically, i want to use perl to do awk functions within a shell script. i want to do the above awk, using perl.
any suggestions? (9 Replies)
Not quite a unix question but problem in a perl command. Taking a chance if someone knows about the error
cat 1
a b c d
perl -p -e 's/a/b/g' 1
b b c d
What is the problem here??
perl -p -i -e 's/a/b/g' 1
Can't remove 1: Text file busy, skipping file. (2 Replies)
hi,
I am using PERL one liner for oracle database connection as :
$PERL -e "use DBI; DBI->connect(qw(DBI:Oracle:SID user passwd));"
is there a way to append select statement to this connection ? i.e. DB connection and select stmt in one line ?
how to do sysdba connection using one lines... (1 Reply)
Perl::Critic::Policy::ErrorHandling::RequireCarping(3) User Contributed Perl Documentation Perl::Critic::Policy::ErrorHandling::RequireCarping(3)NAME
Perl::Critic::Policy::ErrorHandling::RequireCarping - Use functions from Carp instead of "warn" or "die".
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
The "die" and "warn" functions both report the file and line number where the exception occurred. But if someone else is using your
subroutine, they usually don't care where your code blew up. Instead, they want to know where their code invoked the subroutine. The Carp
module provides alternative methods that report the exception from the caller's file and line number.
By default, this policy will not complain about "die" or "warn", if it can determine that the message will always result in a terminal
newline. Since perl suppresses file names and line numbers in this situation, it is assumed that no stack traces are desired either and
none of the Carp functions are necessary.
die "oops" if $explosion; #not ok
warn "Where? Where?!" if $tiger; #not ok
open my $mouth, '<', 'food'
or die 'of starvation'; #not ok
if (! $dentist_appointment) {
warn "You have bad breath!
"; #ok
}
die "$clock not set.
" if $no_time; #ok
my $message = "$clock not set.
";
die $message if $no_time; #not ok, not obvious
CONFIGURATION
By default, this policy allows uses of "die" and "warn" ending in an explicit newline. If you give this policy an
"allow_messages_ending_with_newlines" option in your .perlcriticrc with a false value, then this policy will prohibit such uses.
[ErrorHandling::RequireCarping]
allow_messages_ending_with_newlines = 0
If you give this policy an "allow_in_main_unless_in_subroutine" option in your .perlcriticrc with a true value, then this policy will allow
"die" and "warn" in name space main:: unless they appear in a subroutine, even if they do not end in an explicit newline.
[ErrorHandling::RequireCarping]
allow_in_main_unless_in_subroutine = 1
BUGS
Should allow "die" when it is obvious that the "message" is a reference.
SEE ALSO
Carp::Always
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license
can be found in the LICENSE file included with this module.
perl v5.16.3 2014-06-09 Perl::Critic::Policy::ErrorHandling::RequireCarping(3)