按对象键/值的字母顺序排列Array.sort

Question

所以我有一个包含对象的数组：

var terms = [
 {
  'class-1': {name: 'English', completed: '12/02/19', letterGrade: 'A'}, 
  'class-2': {name: 'Math', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'},
  'class-4': {name: 'World History', completed: '12/02/19', letterGrade: 'A'}
 },
 {
  'class-1': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'},
  'class-2': {name: 'World History', completed: '12/02/19', letterGrade: 'A'},
 },
 {
  'class-1': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'},
  'class-2': {name: 'English', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'Math', completed: '12/02/19', letterGrade: 'A'},
 },
 {
  'class-1': {name: 'English', completed: '12/02/19', letterGrade: 'A'},
  'class-2': {name: 'Algebra', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'Psychology', completed: '12/02/19', letterGrade: 'A'},
 }
]

我想按类名的字母顺序对每个嵌套对象进行排序。但我希望对整个数组进行排序。

我不知道该怎么做。阻碍我的是数据中的嵌套数量。

Answer 1

给定以下输入：

let classes = {
  'class-1': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'},
  'class-2': {name: 'English', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'Math', completed: '12/02/19', letterGrade: 'A'},
}

您可以将每个键/值对分成多个条目，按您希望的方式对这些条目进行排序，然后重新分配给对象，如下所示：

let allEntries = Object.entries(classes)
let sortedEntries = allEntries.sort((a,b) => a[1].name.localeCompare(b[1].name))
let obj = Object.fromEntries(sortedEntries)

这将产生以下结果：

{
  'class-2': {name: 'English', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'Math', completed: '12/02/19', letterGrade: 'A'},
  'class-1': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'}
}

尽管请注意insertion order is not deterministic for js object properties

Stack代码片段中的演示

​

let classes = {
  'class-1': {name: 'P.E.', completed: '12/02/19', letterGrade: 'A'},
  'class-2': {name: 'English', completed: '12/02/19', letterGrade: 'A'},
  'class-3': {name: 'Math', completed: '12/02/19', letterGrade: 'A'},
}

let allEntries = Object.entries(classes)
let sortedEntries = allEntries.sort((a,b) => a[1].name.localeCompare(b[1].name))
let obj = Object.fromEntries(sortedEntries)

console.log(obj)

​