Sort array connected to other array

Question

I have to array 1 for age label and 1 for age count. I wanted to sort the label how to make to values array sorted connected to the first one

AgeLabel = ['43 yo', '12 yo', '33 yo', '25 yo']
AgeCount = [ 10, 20 ,30 ,40 ]

expected result

AgeLabel = ['12 yo', '25 yo', '33 yo', '43 yo']
AgeCount = [ 20, 40 ,30 ,10 ]

Why don't you try an object array?. like const age = [{label:'43 Y0', count:10}, {label:'12 yo', count:20}, ......] — Sojin Antony
– Sojin Antony, Commented Aug 31, 2021 at 8:59
Show us what you've tried so far, your best attempt (code). Please read How to Ask and take the tour! — berend
– berend, Commented Aug 31, 2021 at 8:59

stas.yaranov · Accepted Answer · 2021-08-31 09:21:04Z

3

Many options. For example:

asort($AgeLabel);

$AgeCount = array_map(function ($index) use ($AgeCount) {
    return $AgeCount[$index];
}, array_keys($AgeLabel));

$AgeLabel = array_values($AgeLabel); // only if you need ordered keys

or

$combined = array_combine($AgeLabel, $AgeCount);
ksort($combined);
$AgeLabel = array_keys($combined);
$AgeCount = array_values($combined);

answered Aug 31, 2021 at 9:21

stas.yaranov

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Comments

jspit · Accepted Answer · 2021-08-31 10:03:53Z

2

The array_multisort function is ideally suited for such tasks. Delivers exactly the expected result.

$AgeLabel = ['43 yo', '12 yo', '33 yo', '25 yo'];
$AgeCount = [ 10, 20 ,30 ,40];

array_multisort($AgeLabel,SORT_ASC,$AgeCount);

answered Aug 31, 2021 at 10:03

jspit

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Comments

matiaslauriti · Accepted Answer · 2021-08-31 09:16:26Z

2

Quick and dirty, but i think you get idea. First, merge both arrays, then order by value, and then split them.

$AgeLabel = ['43 yo', '12 yo', '33 yo', '25 yo'];
$AgeCount = [10, 20, 30, 40];
    
    
$AgeTmp = [];

foreach ($AgeLabel as $k => $v) {
    $AgeTmp[$AgeCount[$k]] = $AgeLabel[$k];
}

asort($AgeTmp);
$AgeLabel = [];
$AgeCount = [];

foreach ($AgeTmp as $k => $v) {
    $AgeLabel[] = $k;
    $AgeCount[] = $v;
}

edited Aug 31, 2021 at 9:16

matiaslauriti

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answered Aug 31, 2021 at 9:04

bob

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3 Comments

matiaslauriti Over a year ago

For the last part (separating keys and values again) you can use array_keys and array_values, so you don't have to iterate over each one. Those are built-in PHP functions.

bob Over a year ago

correct, stas.yaranovs answer has this and array_combined() and is quicker, so i dont update my answer...but thanks for the hint :)

jspit Over a year ago

This solution gives incorrect results if $ AgeCount contains the same values how [10,10,20 ..]

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