如何把oldData数据形式转为newData形式的数据

Question

如何把oldData数据形式转为newData形式的数据

  const oldData = {
      1: { 苹果: [{ weight: 1 }] },
      2: { 橘子: [{ weight: 1 }] },
      3: { 苹果: [{ weight: 1.2 }] },
      4: { 苹果: [{ weight: 3 }] },
      5: { 苹果: [{ weight: 4 }, { weight: 1 },{ weight: 1 }], 香蕉: [{ weight: 6 }, { weight: 4}] },
      6: { 香蕉: [{ weight: 3.2 }] },
    }
const newData={
    max:4,
    data:{
        1:[{x:0,num:1,type:'苹果'}],
        2:[{x:0,num:1,type:'橘子'}],
        3:[{x:0,num:1.2,type:'苹果'}],
        4:[{x:0,num:3,type:'苹果'}],
        5:[{x:0,num:4,type:'苹果'},{x:4,num:1,type:'苹果'},{x:5,num:1,type:'苹果'},{x:6,num:6,type:'香蕉'},{x:12,num:4,type:'香蕉'}],
        6:[{x:0,num:3.2,type:'香蕉'}],
    }
}

Answer 1

for。。in遍历oldData，在一层for..in遍历一次oldData里面的项，最后for ..of遍历数组项压入newData中，示例如下

不过max怎么算出来4的？应该是6吧，所有项中的weight最大值。

    const oldData = {
        1: { 苹果: [{ weight: 1 }] },
        2: { 橘子: [{ weight: 1 }] },
        3: { 苹果: [{ weight: 1.2 }] },
        4: { 苹果: [{ weight: 3 }] },
        5: { 苹果: [{ weight: 4 }, { weight: 1 }, { weight: 1 }], 香蕉: [{ weight: 6 }, { weight: 4 }] },
        6: { 香蕉: [{ weight: 3.2 }] },
    }
    const newData = { max: 0, data:{ }}
    for (let item in oldData) {
        newData.data[item] = []
        var x = 0;
        for (var attr in oldData[item]) {
            for (var value of oldData[item][attr]) {
                newData.max = Math.max(newData.max, value.weight);
                newData.data[item].push({ x: x, num: value.weight, type: attr })
                x += value.weight;
            }
        }
    }
    console.log(newData)