Hi...How can I generate random numbers between a given range ...preferably between 1 and 100...in UNIX C programming...?
I tried out functions like rand(),drand48() etc but didnt get satisfactory results...
Thanks a lot in advance.......... (1 Reply)
I need to generate a random number in ksh everytime I run the script ,the range should be from 100 to 24800,I could use $RANDOM but I seem to have no control over the range of numbers ,could you please suggest some way I could implement this .Thanks.
Mervin (2 Replies)
Hi
I have the below code
MAXCOUNT=10
count=1
echo
echo "$MAXCOUNT random numbers:"
echo "-----------------"
while # Generate 10 ($MAXCOUNT) random integers.
do
number=$ + 1 ]
"echo $number"
let "count += 1" # Increment count.
done
But aftre executing this
... (8 Replies)
i tried to use $random function in unix
i simply typed print $random at shell and it returnted no value
is there any function in korn shell that i can use to generate random number
help is appreciated (2 Replies)
Hello,
I need to take a random word from a flat text file with words in it seperated by spaces.
The code I am using, always gives me the first word. Can anyone please shed some light on this. Here's my code.
Thanks
echo table roof ceiling jar computer monitor keyboard carpet >... (5 Replies)
Hi,
I got big problem.
a line contains like this:
Hell "A,B,C", how to delete A or B or C by using sed or other tools?
I do not have any idea.
Many thanks. (2 Replies)
Hello,
I have created a script to generate a random password on Linux/Solaris, but I simply cannot use it on my AIX VMs since Bash isn't installed on them.
I need a password that is randomly created with the following... (12 Replies)
Greetings Experts,
I have an excel file and I am unable to read it directly into awk (contains , " etc); So, I cleansed and copied the data into notepad.
I need to generate a script that generates the SQL.
Requirement:
1. Filter and select only the data that has the "mapping" as "direct"... (4 Replies)
Hi,
I have a file pk.txt which has table related data in following format
TableName | PK
Employee | id
Contact|name,phone,country
I have another file desc.txt which lists datatype of each field like this:
Table|Field|Type
Employee|id|int
Contact|name|string
Contact|country|string... (7 Replies)
I have a multicolumn text file with header in the first row like this
The headers are stored in an array called . which contains I want to search for each elements of this array from that multicolumn text file. And I am using this awk approach
for ii in ${hdr}
do
gawk -vcol="$ii" -F... (1 Reply)
Discussion started by: Atta
1 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)