How to generate a random integer with specific range(for example, from 1 to 1000)?
Also, how to convert a floating point number into a integer? (2 Replies)
Hello All...
Can someone help me generate a random password which will be 7 characters long which contains alpha-numeric characters using shell script.
I am looking to store the output of the script that generates the password to a variable within a script and use it as the password.
... (5 Replies)
I need a function to generate a random alphanumeric password in C code. It needs to be between 6-8 characters and follow the following rules:
Reject if same char appears # time: 4 or more
Reject if same char appears consecutively: 3 or more
I have the following random password working for... (2 Replies)
Hi, Guz!
I'm working on a scripts compiler which needs a function to generate random strings. I think REGX may be a good solution to restrict the string format. Before DIYing I'd like asking for any existing libs or codes.
Any help will be appreciated! (7 Replies)
I saw this formula to generate random number between two specified values in shell script.the following.
$(((RANDOM%(max-min+divisibleBy))/divisibleBy*divisibleBy+min))
Give a example in book.
Generate random number between 6 and 30.like this.
$(((RANDOM%30/3+1)*3))
But I have a... (1 Reply)
hi guys,
I am writing a c program that generates a two dimensional array to make matrix and a vector of random numbers and perform multiplication. I can't figure out whats wrong with my code. It generates a matrix of random numbers but all the numbers in the vector array is same and so is the... (2 Replies)
i want to generate a random number through a script, and even if anyone reads the script, they wont be able to figure out what the random number is. only the person who setup the script would know it.
something like this could work: random
the full thread is here:
... (13 Replies)
Need to use dd to generate a large file from a sample file of random data. This is because I don't have /dev/urandom.
I create a named pipe then:
dd if=mynamed.fifo do=myfile.fifo bs=1024 count=1024
but when I cat a file to the fifo that's 1024 random bytes:
cat randomfile.txt >... (7 Replies)
Hi,
Is anybody experience generate a pair of random number by using awk command?
I wanna to generate a pair of random number (range from 1 to 4124) and repeats it 416 times.
Desired output
2 326
123 1256
341 14
3245 645
.
.
.
I did write the below command:
awk... (5 Replies)
Discussion started by: perl_beginner
5 Replies
LEARN ABOUT DEBIAN
dbix::class::helper::resultset::random
DBIx::Class::Helper::ResultSet::Random(3pm) User Contributed Perl Documentation DBIx::Class::Helper::ResultSet::Random(3pm)NAME
DBIx::Class::Helper::ResultSet::Random - Get random rows from a ResultSet
VERSION
version 2.013002
SYNOPSIS
# note that this is normally a component for a ResultSet
package MySchema::ResultSet::Bar;
use strict;
use warnings;
use parent 'DBIx::Class::ResultSet';
__PACKAGE__->load_components('Helper::ResultSet::Random');
# in code using resultset:
my $random_row = $schema->resultset('Bar')->rand->single;
DESCRIPTION
This component allows convenient selection of random rows. See "NOTE" in DBIx::Class::Helper::ResultSet for a nice way to apply it to your
entire schema.
Currently this works by doing something akin to
SELECT TOP($x) from $table ORDER BY RANDOM()
Lots of people think this is slow. My own benchmarks show that doing the above, for 10 rows in a table with just over 8 million rows, is
nearly instant. Although that was with SQL Server, and different databases will handle that differently.
So please, if you have performance issues and want this to work with your database, get in touch and I will do what I can to get it to work
quickly enough to suite your needs.
METHODS
rand
This method takes a single argument, being the size of the random ResultSet to return. It defaults to 1. This Component will throw
exceptions if the argument is not an integer or not greater than zero.
_rand_order_by
This module currently does an "ORDER BY" on some db specific function. If for some reason it guesses incorrectly for your database the
easiest way to fix that in the short-term (ie without patching upstream) is to override this method. So for example, if your db uses
"RAND()" instead of "RANDOM()" and it's not in the predefined list of dbs you could just do the following in your ResultSet class:
sub _rand_order_by { 'RAND()' }
AUTHOR
Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2012 by Arthur Axel "fREW" Schmidt.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.
perl v5.14.2 2012-06-18 DBIx::Class::Helper::ResultSet::Random(3pm)