That's the exact behavior you'd see if the byte after 'b' is a carriage return. The cursor would be brought back over the 'b' and then the command prompt would overwrite the 'b', making it seem as if it was never printed. Although perhaps the -A option should cause the carriage return to print as ^M or \r (I don't know since my cat does not support that option).
What exactly is in test1.txt? Please paste the output of
Code:
od -cb test1.txt
Regards,
Alister
Code:
> od -cb test1.txt
0000000 a \n b
141 012 142
0000003
BTW: I wan't to loop through each line to do something with "while read", It just missed the last line.
Hi,
I want to check whether file has EOL or NOEOL before opening this file in VI editor. My file is very big its in terms of 15-20 MB.
I am using ksh for this.
When we opened the file in vi editor, normally at last line we are able to see whether this is eol or noeol file. But i does want... (1 Reply)
Hi ,
I'm not so new to linux but very very rusty. Trying to migrate my solar / wind power web server from Windows XP runnning apache to linux. I have the first part of the ftp down as you can see below. I'm having a problem once I have identified the daily file. I'm not being very clear with my... (3 Replies)
Hi,
I'm trying to auto generate some php files with a default preamble at the top which is a block comment.
The problem is that my output has no new lines and it looks like the output from "ls" is being printed after everyline
This is my code
#!/bin/bash
read -d '' pre_amble... (1 Reply)
hi people,
i'm having a hard time trying to extract a list of vars delimited by section inside a ini file ...
let's consider this ini file :
; config file
DESC = "channel synchro TGG01"
DMM_VER = DMM23
PATH_FIFO = /users/tgg00/fifo
QRT = BTS01.TGG.01.2
MODE_TRACE... (5 Replies)
Hi guys,
I have to filter out certain patterns from a log file (arerror.log, for those who know BMC Remedy). The problem is that the file is big, too big to be read properly. Filters aren't working properly on the file, and neither the entire contents are visible using more, or vi.
I FTP'd it to... (9 Replies)
Hi,
I have an inputfile with some table names in it.
For ex:
t_arnge
t_profl
t_fac
I need a script which reads the line one by one and need to assign to some dynamic variable. If to explain the above example:
i need some
a=table_name1
table_name1=t_arnge in first time and... (4 Replies)
I have a perl script I am trying to modify and I cannot seem to get it to do right. I want it if the -l is ran with the script to cat the given file and then exit.
my ( $help, $version, $list );
my $query = 0;
my $default = '';
GetOptions(
'd|default=s' => \$default,
'q|query=s'... (3 Replies)
Hi ,
i have a parameter which has path of a file. Now i need to have another parameter with the content of that file. I tried the belwo script , can any one please help.
I dont want to use cat command to read. Can we do it with out using cat command.
while read line
do... (9 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
You will create a shell script that performs the following action:
Use a parameter to pass a file that... (5 Replies)
So I have a file1.txt that is tab delimited:
e.g.
FIELD1 FIELD2 FIELD3 FIELD4 FIELD5
9545641 123 "Neighbor and Labrador,Canada" 54895 'CANADA'
9456465 456 "Neighbor and Labrador,Canada" 54893 'CANADA'
8746512 789 "Neighbor and... (11 Replies)
Discussion started by: dan139
11 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)