javascript - 通过对对象数组进行排序动态创建多个数组

Question

给定以下对象数组:

var fruits = [
    { type: "banana", number: 20 },
    { type: "apple", number: 2 },
    { type: "pineapple", number: 40 },
    { type: "pineapple", number: 32 },
    { type: "banana", number: 80 },
    { type: "pineapple", number: 24 },
    { type: "apple", number: 64 },
    { type: "apple", number: 12 }
]

如何按类型键对其进行排序，并为每种类型动态创建一个新的对象数组？要获得这样的东西:

// new array of bananas:
[
  { type: "banana", number: 20 },
  { type: "banana", number: 80 }
]

// new array of apples:
[
  { type: "apple", number: 2 },
  { type: "apple", number: 64 },
  { type: "apple", number: 12 }
]

// new array of pineapples:
[
  { type: "pineapple", number: 40 },
  { type: "pineapple", number: 32 },
  { type: "pineapple", number: 24 }
]

Answer 1

这是我的解决方案，循环遍历项目，将其放入具有匹配键的列表中

    var fruits = [
    { type: "banana", number: 20 },
    { type: "apple", number: 2 },
    { type: "pineapple", number: 40 },
    { type: "pineapple", number: 32 },
    { type: "banana", number: 80 },
    { type: "pineapple", number: 24 },
    { type: "apple", number: 64 },
    { type: "apple", number: 12 }
];

var data = {};


fruits.forEach(function(fruit){
   if (data[fruit.type])  {
    data[fruit.type].push(fruit);
   } else {
      data[fruit.type] = [fruit];
   }
});

console.log(data);