A better way to do this?

I have 2 arrays ($scores and $players).

$scores description:
key -> playerId
value -> score

$players
key -> playerId
value -> playerName

Is there a better way than this to replace keys of $scores with values from $players?

PHP:

<?php

//playerId => score
$scores = [10 => 34994, 12 => 23848, 13 => 48939];

//playerId => playerName
$players = [10 => 'Muqsit', 12 => 'NotMuqsit', 13 => 'entity303'];

$res = [];
foreach ($players as $k => $v) {
    $res[$v] = $scores[$k];
}

//$res = ['Muqsit' => 34994, 'NotMuqsit' => 23848, 'entity303' => 48939];


 

Why not use a two dimensional array with playerID as the key, and an array of name and score as the value?

Edit: since your unique ID could just be the players name, do you even need playerID? If so, I'd use the player name (or a hash) as the key anyway... but it depends what you are trying to achieve.

 

Your code timing (microtime): 5.0067901611328
My code timing (microtime): 2.3841857910156

PHP:

<?php

//playerId => score
$scores = [10 => 34994, 12 => 23848, 13 => 48939];

//playerId => playerName
$players = [10 => 'Muqsit', 12 => 'NotMuqsit', 13 => 'entity303'];

foreach ($scores as $k => &$v){
    $v = $players[$k];
}

This is much faster because you're passing by reference rather than value, basically meaning it's real value instead of a copy (I guess you know that already).

 

Passing by reference doesn't make the code execute faster, but that's a nice way.

 

It isn't the answer still, not looking for alternatives.

 

It does save you memory because it doesn't have to waste bytes to create a copy of the array.

 

Not necessarily fast though. It can be easily proven as a myth.

 

This is another method you could use:

PHP:

<?php

//playerId => score
$scores = [10 => 34994, 12 => 23848, 13 => 48939];

//playerId => playerName
$players = [10 => 'Muqsit', 12 => 'NotMuqsit', 13 => 'entity303'];

$res = array_combine(array_keys($players), array_values($scores));

Can't get any faster than this, m8.

 

Wow, okay. That's what I was looking for. Thanks <3