Laravel Collection

whereIn 删选数据

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->whereIn("orgId", [2,3]);
dd($newCollection);

where/whereStrict 删选数据

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->where("orgId", 1);
dd($newCollection);

toJson 集合转JSON 基本上来说不需要

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
dd($colletion->toJson());

对某一项取和

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
dd($colletion->sum("orgId"));

集合分页取数据 splice

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
dd($colletion->splice(1,10));

sort集合排序 sortBy/sortByDesc

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->sortByDesc("icon");
dd($newCollection);

search 搜索某一项在集合中是否存在

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->search(function($item){
    return $item["orgId"] == 4;
});
dd($newCollection);

集合数据反转 reverse

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->reverse();
dd($newCollection);

在集合中添加一条数据 push

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->push([
    "orgId" => 4,
    "name" => "心动",
    "icon" => "icon4"
]);
dd($newCollection);

pull 方法通过键从集合中移除并返回数据项

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->keyBy(function($item){
    return $item["orgId"];
});
$ttCollection = $newCollection->pull("1");    返回删除项
dd($newCollection);  原集合已经改变

prepend 添加数据到集合

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->prepend([
    "orgId" => 4,
    "name" => "哈哈",
    "icon" => "icon4"
]);
dd($newCollection);

pluck 方法为给定键获取所有集合值：

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->pluck("name");
dd($newCollection);

返回某一项的最大值 max

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
dd($colletion->max("orgId"));

mapwithkeys 可以用来返回某些列的数据 mapWithKeys

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->mapWithKeys(function($item){
    return [["orgId" => $item["orgId"], "name" => $item["name"]]];
});
dd($newCollection);

修改集合 map

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->map(function($item){
    $item["icon"] = "hehe";
    return $item;
});
var_dump($newCollection);

取出嵌套集合的key keyBy

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$orgCollection = $colletion->keyBy(function($item){
    return $item["orgId"];
});
var_dump($orgCollection->keys());

为嵌套集合生成Key keyBy

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$orgCollection = $colletion->keyBy(function($item){
    return $item["orgId"];
});
var_dump($orgCollection);

数组是否为空 isEmpty

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
var_dump($colletion->isEmpty());

获取某一列的数据,返回的是字符串 implode

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newString = $colletion->implode("name", ",");
var_dump(json_decode($newString));

数据分页 forPage

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->forPage(1,2);
var_dump($newCollection);

获取集合的第一个元素, 可以根据条件来删选 first

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->first(function($item){
    return $item["orgId"]>2;
});
var_dump($newCollection);

过滤条件, 删选数据 filter

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$newCollection = $colletion->filter(function($item) {
    return $item["orgId"] == 2;
});
var_dump($newCollection);

迭代每一个数据项 each

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
$colletion->each(function($item, $key){
    if ($item["orgId"] == 1) {   暂停迭代
        return false;
    }
});
var_dump($colletion);

集合长度 count

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
var_dump(count($colletion));

是否包含某个值 contains

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
var_dump($colletion->contains(["orgId"], 4));

返回某一项的平均值 avg

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
echo $colletion->avg("orgId");

集合删选 reject

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
var_dump($colletion);

$newCollection = $colletion->reject(function($item){
    return $item["orgId"] == 1;
}) ;
var_dump($newCollection);
var_dump($colletion);

集合转数组 toArray

$colletion = collect([[
    "orgId" => 1,
    "name" => "公司名",
    "icon" => "icon1"
],[
    "orgId" => 2,
    "name" => "公司名",
    "icon" => "icon2"
],[
    "orgId" => 3,
    "name" => "公司名",
    "icon" => "icon3"
]]);
var_dump($colletion->toArray());
var_dump($colletion->all());