Array.sort 按字母順序按 object 鍵/值

Question

所以我有這個包含對象的數組：

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'},
 }
]

我想根據 class 的名稱按字母順序對每個嵌套對象進行排序。 但我希望對整個數組進行排序。

不知道我應該如何 go 這樣做。 阻礙我的是數據中的嵌套數量。

Answer 1

給定以下輸入：

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'},
}

您可以將每個鍵/值對分成條目，根據需要對這些條目進行排序，然后重新分配給 object，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)

這將產生以下結果：

{
  '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'}
}

雖然請注意插入順序對於 js object 屬性不是確定性的

堆棧片段中的演示

 let classes = { 'class-1': {name: 'PE', 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)