我有以下数组。我正在尝试按一堆自定义值对其进行排序。
Array
(
[0] => Array
(
[item] => 'apple'
[quality] => 3
[store] => 'freds'
[price] => 2
)
[1] => Array
(
[item] => 'pear'
[quality] => 1
[store] => 'bobs'
[price] => 3
)
[2] => Array
(
[item] => 'banana'
[quality] => 2
[store] => 'freds'
[price] => 1
)
[3] => Array
(
[item] => 'kiwi'
[quality] => 2
[store] => 'sams'
[price] => 4
)
[4] => Array
(
[item] => 'coconut'
[quality] => 2
[store] => 'sams'
[price] => 6
)
[5] => Array
(
[item] => 'lime'
[quality] => 3
[store] => 'sams'
[price] => 5
)
)
请先按质量进行排序，然后再按最低编号排序。 如果质量相同，则从该自定义数组中按存储顺序对存储进行排序。因此它将bob放在第一位，而sam放在第二位，等等。
Array(0=>'bobs',1=>'sams',2=>'freds')
然后，如果是同一家商店，则按照价格从高到低的顺序排序。
所以数组应该是
[1] => Array
(
[item] => 'pear'
[quality] => 1
[store] => 'bobs'
[price] => 3
)
[2] => Array
(
[item] => 'coconut'
[quality] => 2
[store] => 'sams'
[price] => 6
)
[3] => Array
(
[item] => 'kiwi'
[quality] => 2
[store] => 'sams'
[price] => 4
)
[4] => Array
(
[item] => 'banana'
[quality] => 2
[store] => 'freds'
[price] => 1
)
[5] => Array
(
[item] => 'lime'
[quality] => 3
[store] => 'sams'
[price] => 5
)
[6] => Array
(
[item] => 'apple'
[quality] => 3
[store] => 'freds'
[price] => 2
)
我尝试了很多不同的组合，但无法弄清楚。是否可以仅使用usort，还是我需要手动循环遍历数组并从中找出来？
答案 0 :(得分：0)
受到此答案的启发，该答案部分涵盖了您的问题：https://stackoverflow.com/a/4582659/2377164
您可以先按质量ASC订购，然后按PRICE DESC
<span tooltip="hello" [isDisabled]="false">
<button type="button" class="btn btn-primary" disabled>
<i class="fa fa-book-open"></i> btn disabled
</button>
</span>
然后您可以通过自定义数组在内部订购：
<?php
$toto = [
0 => [
"item" => 'apple',
"quality" => 3,
"store" => 'freds',
"price" => 2,
],
1 => [
"item" => 'pear',
"quality" => 1,
"store" => 'bobs',
"price" => 3,
],
2 => [
"item" => 'banana',
"quality" => 2,
"store" => 'freds',
"price" => 1,
],
3 => [
"item" => 'kiwi',
"quality" => 2,
"store" => 'sams',
"price" => 4,
],
4 => [
"item" => 'coconut',
"quality" => 2,
"store" => 'sams',
"price" => 6,
],
5 => [
"item" => 'lime',
"quality" => 3,
"store" => 'sams',
"price" => 5,
],
];
array_multisort(
array_column($toto, 'quality'), SORT_ASC,
array_column($toto, 'price'), SORT_DESC,
$toto
);
因此无需循环，您的最终脚本将是
usort($toto, function ($pr, $nx) {
$comp = [0 => 'bobs', 1 => 'freds', 2 => 'sams'];
$flipped = array_flip($comp);
return
$pr['quality'] === $nx['quality'] &&
$flipped[$pr['store']] > $flipped[$nx['store']];
});
var_dump($toto);
array_multisort(
array_column($toto, 'quality'), SORT_ASC,
array_column($toto, 'price'), SORT_DESC,
$toto);
usort($toto, function ($pr, $nx) {
$comp = [0 => 'bobs', 1 => 'freds', 2 => 'sams'];
$flipped = array_flip($comp);
return $pr['quality'] === $nx['quality'] && $flipped[$pr['store']] > $flipped[$nx['store']];
});
是您的数组
将为您提供自定义的$toto
Array(0=>'bobs',1=>'sams',2=>'freds')还有自定义数组array(6) {
[0] =>
array(4) {
'item' =>
string(4) "pear"
'quality' =>
int(1)
'store' =>
string(4) "bobs"
'price' =>
int(3)
}
[1] =>
array(4) {
'item' =>
string(7) "coconut"
'quality' =>
int(2)
'store' =>
string(4) "sams"
'price' =>
int(6)
}
[2] =>
array(4) {
'item' =>
string(4) "kiwi"
'quality' =>
int(2)
'store' =>
string(4) "sams"
'price' =>
int(4)
}
[3] =>
array(4) {
'item' =>
string(6) "banana"
'quality' =>
int(2)
'store' =>
string(5) "freds"
'price' =>
int(1)
}
[4] =>
array(4) {
'item' =>
string(4) "lime"
'quality' =>
int(3)
'store' =>
string(4) "sams"
'price' =>
int(5)
}
[5] =>
array(4) {
'item' =>
string(5) "apple"
'quality' =>
int(3)
'store' =>
string(5) "freds"
'price' =>
int(2)
}
}
Array(0=>'bobs',1=>'freds',2=>'sams')我认为它可以满足您的需求。
答案 1 :(得分：0)
usort可以做到。只需在比较器中输入所有需求，然后使用array_flip使商店订购进入快速查找表即可。
$data = [
[
"item" => 'apple',
"quality" => 3,
"store" => 'freds',
"price" => 2
],
[
"item" => 'pear',
"quality" => 1,
"store" => 'bobs',
"price" => 3
],
[
"item" => 'banana',
"quality" => 2,
"store" => 'freds',
"price" => 1
],
[
"item" => 'kiwi',
"quality" => 2,
"store" => 'sams',
"price" => 4
],
[
"item" => 'coconut',
"quality" => 2,
"store" => 'sams',
"price" => 6,
],
[
"item" => 'lime',
"quality" => 3,
"store" => 'sams',
"price" => 5
]
];
$stores = array_flip(['bobs', 'sams', 'freds']);
usort($data, function ($a, $b) {
global $stores;
if ($a['quality'] === $b['quality']) {
if ($stores[$a['store']] === $stores[$b['store']]) {
return $b['price'] - $a['price'];
}
else {
return $stores[$a['store']] > $stores[$b['store']];
}
}
return $a['quality'] - $b['quality'];
});
print_r($data);
输出：
Array
(
[0] => Array
(
[item] => pear
[quality] => 1
[store] => bobs
[price] => 3
)
[1] => Array
(
[item] => coconut
[quality] => 2
[store] => sams
[price] => 6
)
[2] => Array
(
[item] => kiwi
[quality] => 2
[store] => sams
[price] => 4
)
[3] => Array
(
[item] => banana
[quality] => 2
[store] => freds
[price] => 1
)
[4] => Array
(
[item] => lime
[quality] => 3
[store] => sams
[price] => 5
)
[5] => Array
(
[item] => apple
[quality] => 3
[store] => freds
[price] => 2
)
)
还有一个repl可以尝试。
答案 2 :(得分：0)
绝对可以使用usort进行任何排序，因为它允许用户/开发人员定义排序方式。
以下是带有可调用函数的usort：
usort($data, function ($a,$b){
if($a['quality']==$b['quality']){
if($a['store']==$b['store']){
if($a['price']==$b['price']){
return 0;
}else{
return $a['price']>$b['price']?-1:1;//Sort by price higher to lower i.e. Descending
}
}else{
return $a['store']<$b['store']?-1:1;//Sort by store lower to higher i.e. Ascending
}
}else{
return $a['quality']<$b['quality']?-1:1;//Sort by quality lower to higher i.e. Ascending
}
});
var_dump($data);
检查代码并在以下位置输出：https://3v4l.org/CD2qE
说明：
与数组一起使用时，它使用可调用函数对数组中的每两个元素进行比较。 可调用函数应根据用户/开发人员希望对元素进行排序的方式返回1、0或-1。
如果要比较的元素的位置不变，则可调用函数应返回0 。
如果要在另一个元素之前放置，则可调用函数应返回-1 。
如果要在另一个元素之后放置，则可调用函数应返回1 。
答案 3 :(得分：0)
您将使用array_flip通过商店名称访问$ stores数组以获取数字键，然后使用usort函数定义条件以将数组返回到预期输出。
$ array将是存储数组变量的任何内容，因此请进行相应调整：
$stores = array_flip(['bobs', 'sams', 'freds']);
usort($array, function($a, $b) use ($stores) {
$quality = $a['quality'] == $b['quality'];
$store = $a['store'] == $b['store'];
if ($quality && $store): return $a['price'] < $b['price'];
elseif ($quality && !$store): return $stores[$a['store']] > $stores[$b['store']];
else: return $a['quality'] > $b['quality'];
endif;
});