[英]Sort array and rebuild it
我有这个数组:
$all = array(
'meat' => Object(
'name' => 'meat',
'color' => 'red',
'class' => 'food'
),
'chicken' => Object(
'name' => 'chicken',
'color' => 'white',
'class' => 'food'
),
'apple' => Object(
'name' => 'apple',
'color' => 'green',
'class' => 'Fruit'
),
'blueberry' => Object(
'name' => 'blueberry',
'color' => 'blue',
'class' => 'Fruit'
)
);
我想对它进行排序并重建它像这样:
$theright = array(
array(
'class' => 'food',
'menu' => array(
array(
'name' => 'meat',
'color' => 'red',
),
array(
'name' => 'chicken',
'color' => 'white',
)
)
),
array(
'class' => 'Fruit',
'menu' => array(
array(
'name' => 'apple',
'color' => 'green',
),
array(
'name' => 'blueberry',
'color' => 'blue',
)
)
)
);
我试图收集$all
数组中的所有类,然后将每个值与$all
数组进行比较:
$classArray = array();
foreach($all as $key => $value) {
$classArray[$value->class] = array();
}
foreach($classArray as $key => $value) {
$theright[] = array('class' => $key, 'menu' => array());
}
这段代码给我这个数组:
$theright = array(
array(
'class' => 'food',
'menu' => array()
),
array(
'class' => 'Fruit',
'menu' => array()
)
);
我停在这里,如何完成?
您可以只使用类作为将它们组合在一起的键。 例:
$food = array();
// gather class
foreach($all as $item) {
if(!isset($food[$item->class])) {
$food[$item->class] = array(
'class' => $item->class,
'menu' => array(
array(
'name' => $item->name,
'color' => $item->name,
)
)
);
} else {
$food[$item->class]['menu'][] = array('name' => $item->name,'color' => $item->color,);
}
}
// simple reindex
$food = array_values($food);
不需要第二个循环。 这应该做您想要的。
$classMap = array();
foreach ($all as $item)
{
// check if class has been created in the class map
if ( ! array_key_exists($classMap, $item['class']))
{
$classMap[$item['class']] = array(
'class' => $item['class'],
'menu' => array()
);
}
$classMap[$item['class']]['menu'][] = array(
'name' => $item['name'],
'color' => $item['color']
);
}
尝试使用更少的循环计数(2)
$all = [];
function getSelectClassData(array &$all)
{
$finalArr = [];
while (count($all) > 1) {
$res = [];
$class = array_values($all)[0]->class;
$selectedDataArr = getSelectSimilerMenuData($all, $class);
$res['class'] = $class;
$res['menu'] = array_values($selectedDataArr);
$all = array_diff_key($all,array_flip(array_keys($selectedDataArr)));
$finalArr[] = $res;
}
return $finalArr;
}
function getSelectSimilerMenuData(array $all, $class)
{
return array_filter(
$all,
function ($e) use ($class) {
return $e->class == $class;
}
);
}
print_r(getSelectClassData($all));
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