Hi,
I am opening a file......then i am wrting some data into it......and i am reopening the file again but ......i get a error cannot open file.......
$::file= "\adder\testfile.txt"
open(TEST1,$::file);
some write operation
close(TEST1)
open(TEST1,$::file) 'I GET A ERROR CAN OPEN... (2 Replies)
Hi Experts,
I have a big text file, so I want read it at eof to upper bound !. after I use a fseek to go SEEK_END, is it possible to step up upperbound?
Best Regards.
Note that I'm used perl script. (2 Replies)
Hi ,
Is there any way to achieve following using perl program (i.e without using system command).
1.system ("echo 'test' > /usr/spool/ship.csv");
2.system ("cat /usr/ajay_test* >> /usr/spool/RAM/work/patil.csv");
3.system("> /usr/spool/ajay.txt");
e.g
for system("rm -f... (1 Reply)
Hello all,
I have created a Perl script that tries to open connections to various systems on different ports in order to see if the machines are reachable, the ports are open, etc.
There appears to be a difference between Solaris (10) and Linux (RH/Oracle and Ubuntu) in the status or error it... (4 Replies)
I can get this working, but if something is down I get an error and the script does not move on. I can not get the "else" function working. What might I be doing wrong?
use SNMP::Simple
my %ios = ();
$list="list.list";
open(DAT, $list) || die("Can't Open List");
@raw_data=<DAT>;... (4 Replies)
$# some text
$$ some text
$@ some text
$$. some text
Mg1 some text
Mg2 some text
.
.
.
Mg10 some text
The above 10 lines are to be extracted except the lines starting from $#,$$.,... (4 Replies)
I have a PERL command line embedded in a UNIX script. The script doesn't handle errors coming out of this command. I'm processing large files and occassionally I run out of disk space and end up with half a file.
perl -p -e 's/\n/\r\n/g' < TR_TMP_$4 > $4
How do I handle errors coming out... (1 Reply)
Hi
Am making connection to oracle using ISQL as shown in the code.
This code is just a minor part of a big code.
I want to capture the error if the password/login is wrong or if connection is not made.
I need to capture the error code also.
Also, If such an error occurs, i need to exit out... (4 Replies)
Hi Guys,
I got a csv with pipe delimted file and i want to check second column of the file has any alpha character becuase I am expecting only number in that,
and if any alpha characters then it should throw an error
Thanks in advance (1 Reply)
Hi,
I have a perl script which is just reading from the file but what I would like to understand is how the counter is moving without using the loop in the script.
Below are the details:
$ more /tmp/abc.txt
This is 0
This is 1
This is 2
This is 3
This is 4
This is 5
This is 6
This... (2 Replies)
Discussion started by: siddharthjindal
2 Replies
LEARN ABOUT OSX
sub::quote
Sub::Quote(3) User Contributed Perl Documentation Sub::Quote(3)NAME
Sub::Quote - efficient generation of subroutines via string eval
SYNOPSIS
package Silly;
use Sub::Quote qw(quote_sub unquote_sub quoted_from_sub);
quote_sub 'Silly::kitty', q{ print "meow" };
quote_sub 'Silly::doggy', q{ print "woof" };
my $sound = 0;
quote_sub 'Silly::dagron',
q{ print ++$sound % 2 ? 'burninate' : 'roar' },
{ '$sound' => $sound };
And elsewhere:
Silly->kitty; # meow
Silly->doggy; # woof
Silly->dagron; # burninate
Silly->dagron; # roar
Silly->dagron; # burninate
DESCRIPTION
This package provides performant ways to generate subroutines from strings.
SUBROUTINES
quote_sub
my $coderef = quote_sub 'Foo::bar', q{ print $x++ . "
" }, { '$x' => };
Arguments: ?$name, $code, ?\%captures, ?\%options
$name is the subroutine where the coderef will be installed.
$code is a string that will be turned into code.
"\%captures" is a hashref of variables that will be made available to the code. See the "SYNOPSIS"'s "Silly::dagron" for an example using
captures.
options
o no_install
Boolean. Set this option to not install the generated coderef into the passed subroutine name on undefer.
unquote_sub
my $coderef = unquote_sub $sub;
Forcibly replace subroutine with actual code. Note that for performance reasons all quoted subs declared so far will be globally
unquoted/parsed in a single eval. This means that if you have a syntax error in one of your quoted subs you may find out when some other
sub is unquoted.
If $sub is not a quoted sub, this is a no-op.
quoted_from_sub
my $data = quoted_from_sub $sub;
my ($name, $code, $captures, $compiled_sub) = @$data;
Returns original arguments to quote_sub, plus the compiled version if this sub has already been unquoted.
Note that $sub can be either the original quoted version or the compiled version for convenience.
inlinify
my $prelude = capture_unroll {
'$x' => 1,
'$y' => 2,
};
my $inlined_code = inlinify q{
my ($x, $y) = @_;
print $x + $y . "
";
}, '$x, $y', $prelude;
Takes a string of code, a string of arguments, a string of code which acts as a "prelude", and a Boolean representing whether or not to
localize the arguments.
capture_unroll
my $prelude = capture_unroll {
'$x' => 1,
'$y' => 2,
};
Generates a snippet of code which is suitable to be used as a prelude for "inlinify". The keys are the names of the variables and the
values are (duh) the values. Note that references work as values.
CAVEATS
Much of this is just string-based code-generation, and as a result, a few caveats apply.
return
Calling "return" from a quote_sub'ed sub will not likely do what you intend. Instead of returning from the code you defined in
"quote_sub", it will return from the overall function it is composited into.
So when you pass in:
quote_sub q{ return 1 if $condition; $morecode }
It might turn up in the intended context as follows:
sub foo {
<important code a>
do {
return 1 if $condition;
$morecode
};
<important code b>
}
Which will obviously return from foo, when all you meant to do was return from the code context in quote_sub and proceed with running
important code b.
perl v5.16.2 2012-07-04 Sub::Quote(3)