laravel 集合函数reduce的运用

原始数据

Collection {#1643 ▼
  #items: array:10 [▼
1 => {#1677 ▼
      +"id": 1
      +"name": "测试"
}
2 => {#1673 ▼
      +"id": 2
      +"name": "格格寄存"
}
3 => {#1672 ▼
      +"id": 3
      +"name": "格格洗衣"
}
4 => {#1671 ▼
      +"id": 4
      +"name": "格格租借"
}
5 => {#1670 ▼
      +"id": 5
      +"name": "丰巢寄件"
}
6 => {#1669 ▼
      +"id": 6
      +"name": "裹裹寄件"
}
7 => {#1668 ▼
      +"id": 7
      +"name": "裹儿寄件"
}
8 => {#1667 ▼
      +"id": 8
      +"name": "格格快递员预定"
}
9 => {#1666 ▼
      +"id": 9
      +"name": "格格快递员租用"
}
10 => {#1665 ▼
      +"id": 10
      +"name": "圆通预约"
}
]}

需要得到的数据

array:10 [▼
1 => "测试"
2 => "格格寄存"
3 => "格格洗衣"
4 => "格格租借"
5 => "丰巢寄件"
6 => "裹裹寄件"
7 => "裹儿寄件"
8 => "格格快递员预定"
9 => "格格快递员租用"
10 => "圆通预约"]

把二维数据转成一维数组

$new = collect($merchant_items)->reduce(function($res,$item){
return $res + [$item->id => $item->name];
},[]);