CODEWITHSUNDEEP
phpalgorithm
israel
israel

Reputation: 360

Simple number distribution in array php

I want to distribute in array to get homogeneous distribution.

I created an array with array_fill, and set a variable $fill with a valor up to 20 to distribute in that array.

What I need to get as result - for example:

$fill = 5; 

// returns
Array (
    [0] => 0
    [1] => 0
    [2] => 0
    [3] => 1
    [4] => 0
    [5] => 0
    [6] => 0
    [7] => 1
    [8] => 0
    [9] => 0
    [10] => 0
    [11] => 1
    [12] => 0
    [13] => 0
    [14] => 0
    [15] => 1
    [16] => 0
    [17] => 0
    [18] => 0
    [19] => 1
)

$fill = 10; 

// returns
Array (
    [0] => 0
    [1] => 1
    [2] => 0
    [3] => 1
    [4] => 0
    [5] => 1
    [6] => 0
    [7] => 1
    [8] => 0
    [9] => 1
    [10] => 0
    [11] => 1
    [12] => 0
    [13] => 1
    [14] => 0
    [15] => 1
    [16] => 0
    [17] => 1
    [18] => 0
    [19] => 1
)

What should I do for, $fill = 6, 18 or even 19 ?

Edit 1:

The remainders I don't have preference to start or end, I need to fill the array with at least fair distribution, so when I foreach the array, I don't get a long sequence of 1 or 0.

I tried this

$fill = 5;
$arr = array_fill(0,20,0);
$gap = 20 / $fill;
foreach($arr as $k=>$v) {
    if( is_int($k / $gap) ) {
        $arr[$k] = 1;
    }
}

print_r($arr);

but it doesn't work with 8,12 or 18

Edit 2:

Sorry for the complication, I just need to fill the array with all 5,10 or 18 '1's, don't necessary the same quantity for zeros, but at least this:

$fill = 18; 

// returns
Array (
    [0] => 1
    [1] => 1
    [2] => 1
    [3] => 1
    [4] => 1
    [5] => 0
    [6] => 1
    [7] => 1
    [8] => 1
    [9] => 1
    [10] => 1
    [11] => 1
    [12] => 1
    [13] => 1
    [14] => 1
    [15] => 0
    [16] => 1
    [17] => 1
    [18] => 1
    [19] => 1
)

Upvotes: 1

Views: 371

Answers (1)

Death-is-the-real-truth
Death-is-the-real-truth

Reputation: 72299

You can do it like below :

<?php

function getArray($fill,$noOfItem){

    $maxIndex = floor($noOfItem/$fill);
    
    
    $rang = range(1,20);
    
    $finalArray = [];
    
    foreach($rang as $key => $val){
        if($val % $maxIndex == 0 && array_sum($finalArray) < $fill){
            $finalArray[] =1;
        }else{
            $finalArray[] =0;
        }
    }
    
    print_r($finalArray);
}

getArray(6,20);
getArray(8,20);
getArray(19,20);

Output: https://3v4l.org/QY6HQ And https://3v4l.org/gQeHa (for a bit uniformity)

Note: Uniformity of 0 and 1 is not 100% guarantee in above answer.

Upvotes: 1

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