I want to be able to group Associative Arrays with their `keys. So far I'm lost of what syntax to use.
As of now, I have thus code,
$associativeArray = array("Ripe Mango"=>"Yellow", "Strawberry"=>"Red", "Lemon"=>"Yellow");
groupByColor($associativeArray);
function groupByColor($groupedArray)
{
return $groupedArray;
}
My goal is to return the array while having it grouped, the ideal result will be like this;
["Yellow"=>["Ripe Mango", "Lemon"], "Red"=>["Strawberry"]]
Any hints on what method to use?
Inside function do foreach()
<?php
$associativeArray = array("Ripe Mango"=>"Yellow", "Strawberry"=>"Red", "Lemon"=>"Yellow");
function groupByColor($associativeArray){
$final_array = [];
foreach($associativeArray as $key=>$val){
$final_array[$val][] = $key;
}
return $final_array;
}
print_r(groupByColor($associativeArray));
Output:- https://eval.in/933011
Note:- you can assign groupByColor($associativeArray) returned array to a new variable and print that variable like below:-
$color_array = groupByColor($associativeArray);
print_r($color_array);
You can do this by processing each key and convert value to key and check if exist then append to it else create it
function groupByColor ($groupedArray) {
$result = array();
foreach ($groupedArray as $key=>$val) {
if (array_key_exists($val, $result)) {
$result[$val][] = $key;
} else {
$result[$val] = array();
}
}
return $result;
}
foreach() through your array and add to a new array with the color as key:
<?php
$associativeArray = array("Ripe Mango"=>"Yellow", "Strawberry"=>"Red", "Lemon"=>"Yellow");
$new = groupByColor($associativeArray);
var_dump($new);
function groupByColor($groupedArray)
{
foreach ( $groupedArray as $key => $color ) {
$tmp[$color][] = $key;
}
return $tmp;
}
You can use array_walk function to trait every value of the array:
<?php
$array = ["Ripe Mango"=>"Yellow", "Strawberry"=>"Red", "Lemon"=>"Yellow"];
$result = [];
array_walk($array, function ($value, $key) use (&$result) {
$result[$value][] = $key;
});
print_r($result);
Only way I know how to do it would be with a loop.
<!DOCTYPE html>
<html>
<body>
<?php
$associativeArray = array("Ripe Mango"=>"Yellow", "Strawberry"=>"Red", "Lemon"=>"Yellow");
$data = groupByColor($associativeArray);
print_r($data);
function groupByColor($groupedArray)
{
foreach ($groupedArray as $key => $value) {
$final[$value][] = $key;
}
return $final;
}
?>
</body>
</html>