I want to add an element to an array at random postion using a loop

Question

I have a fixed ranks like the following

$ranks=array("10","9","8","7","6","5","4","3","2","1");

And I have a random rank position according to a chain,

$agent_ranks=array("10","6","2","1");

which are missing indices

I have calculated the difference between the arrays

$arr_diff=array("9","8","7","5","4","3");

Now I want a dynamic array as a result:

$arr_diff_new=array("0","9","8","7","0","5","4","3","0","0");

How can I add value="0" at the missing indices?

create a new array, and iterating through the ranks, add to it 0 or the number depending if the value exists in missing index — mikus
– mikus, Commented Feb 2, 2016 at 9:30

VolkerK · Accepted Answer · 2016-02-02 09:32:07Z

3

<?php
$ranks=array("10","9","8","7","6","5","4","3","2","1");
$agent_ranks= array_flip( array("10","6","2","1") );

foreach( $ranks as $k=>$v ) {
    if ( isset($agent_ranks[$v]) ) {
        $ranks[$k] = 0;
    }
}

var_export($ranks);

prints

array (
  0 => 0,
  1 => '9',
  2 => '8',
  3 => '7',
  4 => 0,
  5 => '5',
  6 => '4',
  7 => '3',
  8 => 0,
  9 => 0,
)

2 Comments

Narendrasingh Sisodia Over a year ago

No need to use an extra function like as array_flip

VolkerK Over a year ago

What's more "extra" about array_flip than in_array? btw: No need to use foreach, either. It's just simple and convinient. ;-)

Hardik Solanki · Accepted Answer · 2016-02-02 09:43:13Z

0

You can do it using in_array and for loop:

$ranks=array("10","9","8","7","6","5","4","3","2","1");
$agent_ranks=array("10","6","2","1");

for($i=0;$i < count($ranks); $i++){
    if(in_array($ranks[$i], $agent_ranks)){
        $newarray[$i] = 0;
    }else{
        $newarray[$i] = $ranks[$i];
    }
}
print_r($newarray);

edited Feb 2, 2016 at 9:43

answered Feb 2, 2016 at 9:37

Hardik Solanki

3,2151 gold badge21 silver badges30 bronze badges

1 Comment

Hardik Solanki Over a year ago

@VivekSrivastava: If it's work then give upvote and mark as answer, So other user trust in mark answer.

Gvidas · Accepted Answer · 2016-02-02 09:35:01Z

0

You can also use in_array in if clause to check if rank is int $agent_ranks and then push 0 or old rank value to new array

$arr_diff_new = array();
foreach($ranks as $rank){
    array_push($arr_diff_new,(in_array($rank,$agent_ranks))?0:$rank);
}

answered Feb 2, 2016 at 9:35

Gvidas

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Comments

Rogin Thomas · Accepted Answer · 2016-02-02 09:41:56Z

0

You can use array function array_map,

<?php
$array1=array("10","9","8","7","6","5","4","3","2","1");
print_r(array_map('filter',$array1));
function filter($a){
 $array2=array("9","8","7","5","4","3");
 if(in_array($a,$array2)){
    return $a;
 }else{
    return 0;
 }
}

?>

answered Feb 2, 2016 at 9:41

Rogin Thomas

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Comments

Narendrasingh Sisodia · Accepted Answer · 2016-02-02 09:48:43Z

0

Simply using in_array with foreach loop like as

$ranks=array("10","9","8","7","6","5","4","3","2","1");
$agent_ranks=array("10","6","2","1");
$result = array();
foreach($ranks as $key => $value){
    $result[] = in_array($value,$agent_ranks) ? 0 : $value;
}
print_r($result);

answered Feb 2, 2016 at 9:48

Narendrasingh Sisodia

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