CODEWITHSUNDEEP
phplaravel
Jerin Monish
Jerin Monish

Reputation: 115

Pair users randomly with each other

I have got all the user records using random function from user table, Now when i loop the users and try to display,

I need the record like this:

user a = user b
user c = user a
user b = user c

I must not get this kind:

user a = user a
user b = user b

Below is my code

public function randomUser(){
    $userData1   = User::inRandomOrder()->orderBy('email', 'ASC')->get();
    $userData2   = User::inRandomOrder()->orderBy('id', 'DESC')->get();
    foreach($userData1 as $key => $value ) {
        if($userData1[$key]->id != $userData2[$key]->id){
            echo $userData1[$key]->first_name.$userData1[$key]->last_name."-".$userData2[$key]->first_name.$userData2[$key]->last_name."<br>";
        }
    }
}

Upvotes: 1

Views: 108

Answers (2)

Pradeep Rajput
Pradeep Rajput

Reputation: 725

inRandomOrder() is super slow so you might want not to use it. You should select your data once from DB with the help of simple query without orderBy.

  • For single dimensional array:

Assign your resulted array of users in two variables.

$a = $b = ['user a','user b','user c'];

Shuffle array $a for random

shuffle($a);

Loop it in do-while loop Shuffle array $b and Compare both $a & $b arrays by index & values

do{
    shuffle($b);
    $c = array_diff_assoc($a, $b);
}while(count($c)!=count($a));
  • For multidimensional array:

Assign your resulted array of users in two variables.

$a = $b = [array('id' => 1, 'name' => "abc"),array('id' => 2, 'name' => "def"),array('id' => 3, 'name' => "ghi")];

Shuffle array $a for random

shuffle($a);

Function to compare multidimensional arrays

function arrayRecursiveDiff($aArray1, $aArray2) { 
    $aReturn = array(); 

    foreach ($aArray1 as $mKey => $mValue) { 
        if (array_key_exists($mKey, $aArray2)) { 
            if (is_array($mValue)) { 
                $aRecursiveDiff = arrayRecursiveDiff($mValue, $aArray2[$mKey]); 
                if (count($aRecursiveDiff)) { $aReturn[$mKey] = $aRecursiveDiff; } 
            } else { 
                if ($mValue != $aArray2[$mKey]) { 
                    $aReturn[$mKey] = $mValue; 
                } 
            } 
        } else { 
            $aReturn[$mKey] = $mValue; 
        } 
    }
    return $aReturn; 
}

Loop it in do-while loop Shuffle array $b and Compare both $a & $b arrays by index & values

do{
    shuffle($b);
    $c = arrayRecursiveDiff($a, $b);
}while(count($c)!=count($a));

Both arrays will be completely different from each other. Now you can do whatever with these two arrays.

Upvotes: 1

Alexey Mezenin
Alexey Mezenin

Reputation: 163938

You need to use some kind of algorithm here. For example, you could get all users into a collection. Then just get and remove each user from the collection using shift() and/or pop() methods. This is an example, modify it as you want:

$users1 = User::inRandomOrder()->get();
$users2 = $users1;
foreach ($users1 as $user) {
    echo $user->full_name. ' - '. $users2->pop()->full-name;
}

Also, to make full_name work, use an accessor instead of concatenating two string manually each time.

Upvotes: 0

Related Questions