javascript - d3.js : sort nested arrays

Question

请问如何对嵌套的数组进行排序，如下所示？我想对数组 prob 进行排序，然后相应地重新排列 name 以便保持关系。

var records = [
{ num: 1, name: ["Sam", "Amy", "John"], prob: [0.3, 0.2, 0.5]},
{ num: 2, name: ["Nick", "Carol", "Sam"], prob: [0.5, 0.03, 0.47] },
{ num: 3, name: ["Ken", "Eric", "Ely"], prob: [0.1, 0.3, 0.6] },
{ num: 4, name: ["Amy", "Sam", "John"], prob: [0.6, 0.3, 0.1] },
{ num: 5, name: ["Chris", "Donna", "Jeff"], prob: [0.25, 0.55, 0.2] }
]

我想结束:

var records = [
{ num: 1, name: ["John", "Sam", "Amy"], prob: [0.5, 0.3, 0.2]},
{ num: 2, name: ["Nick", "Sam", "Carol"], prob: [0.5, 0.47, 0.03] },
{ num: 3, name: ["Ely", "Eric", "Ken"], prob: [0.6, 0.3, 0.1] },
{ num: 4, name: ["Amy", "Sam", "John"], prob: [0.6, 0.3, 0.1] },
{ num: 5, name: ["Donna", "Chris", "Jeff"], prob: [0.55, 0.25, 0.2] }
]

谢谢!

Answer 1

这里有一个解决方案:我们可以将 names 和 prob 存储在 pairs 中，同时对两个值进行排序，然后我们分配这些名称和 probs 排序到主要对象:

var records = [
{ num: 1, name: ["Sam", "Amy", "John"], prob: [0.3, 0.2, 0.5]},
{ num: 2, name: ["Nick", "Carol", "Sam"], prob: [0.5, 0.03, 0.47] },
{ num: 3, name: ["Ken", "Eric", "Ely"], prob: [0.1, 0.3, 0.6] },
{ num: 4, name: ["Amy", "Sam", "John"], prob: [0.6, 0.3, 0.1] },
{ num: 5, name: ["Chris", "Donna", "Jeff"], prob: [0.25, 0.55, 0.2] }
];

var pairs = records.map((e,i)=>
e.name.map((e2,i2)=>[e2,records[i].prob[i2]]).sort((a,b)=>b[1]-a[1])
);

records.map((e, i) => {
  e.name = pairs[i].map(o => o[0])
  e.prob = pairs[i].map(o => o[1])      
})

console.log(records)