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Can I specify conditions for the rand() function?


By : Muchacha Hermosa
Date : September 17 2020, 12:00 AM
hope this fix your issue It is not (currently) clear in the question, but from the clarification in the comments:
code :
int num[5] ;
int omit = 1 + rand() % 6 ;
for( int i = 0, j = 0; i < sizeof(num) / sizeof(*num); i++, j++ )
{
    if( i != omit ) num[j] = i ;
}


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PHP, MySQL: how to select random records without RAND (attempt to avoid RAND())


By : Amit Singh
Date : March 29 2020, 07:55 AM
will be helpful for those in need , You could try this:
code :
$row = mysql_fetch_assoc(
    mysql_query(
      "SELECT count(*) as count FROM table WHERE category_id='$var'"));

$randomrow = rand(0, $row['count'] -1);

$q = mysql_query("
  SELECT * FROM table 
  WHERE category_id='$var'
  LIMIT 1 OFFSET $randomrow");

Reversing rand in perl 5.10.0, anyone know where to find the source code for rand/srand?


By : bezurk21
Date : March 29 2020, 07:55 AM
Hope that helps You don't want to look in /lib/perl, you want to look in the Perl source.
Here is Perl_seed() in util.c as of v5.10.0, which is the function called if srand is called without an argument, or if rand is called without srand being called first.

Alternative to rand() for avoid race conditions?


By : Nguyen Do
Date : March 29 2020, 07:55 AM
To fix this issue You can make use of std::uniform_int_distribution and std::mt19937 to keep a generator with your common seed (all from library).
code :
std::mt19937 gen(SEED);
std::uniform_int_distribution<> dis(MIN, MAX);
auto random_number = dis(gen);
std::mt19937 gen{};
gen.seed(SEED);
std::random_device rd{};
std::mt19937 gen(rd());

How to give conditions to Rand()


By : mader
Date : March 29 2020, 07:55 AM
will help you First time on stack overflow. , Well, personally I think you are not far from the answer:
code :
rand() % 26 + 65
#include <iostream>
#include <string>
#include <stdlib.h>     /* srand, rand */
#include <time.h>       /* time */


char randomChar(){
   return rand() % 26 + 65;
}

std::string randomString(int length)
{
    srand (time(NULL));
    std::string rc("");
    for(int i=0; i<length; ++i)
    {
        rc += randomChar();
    }
    return rc;
}

int main()
{
  std::cout << "Random string (x5) is " << randomString(5) << "\n";
}

Why does the rand.Intn() function from math/rand package generate the same sequence of random numbers everytime I run th


By : Rob Napier
Date : March 29 2020, 07:55 AM
I hope this helps you . From documentation
code :
rand.Seed(time.Now().UTC().UnixNano())
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