我的变量optionsPergunta中有一个需要排序的对象数组options：
我尝试过类似的事情：
optionsPergunta.sort(this.sorteiaArray)
sorteiaArray(){
return Math.random() < Math.random()
}
但是当我做console.log(optionsPergunta.options)时，位置没有改变
optionsPergunta是查询的结果，所以当我执行console.log（optionsPergunta）时，我得到以下结果：
[
BookUnitQuestionOption {
__setters__: [
'$attributes',
'$persisted',
'primaryKeyValue',
'$originalAttributes',
'$relations',
'$sideLoaded',
'$parent',
'$frozen',
'$visible',
'$hidden'
],
'$attributes': {
id: 6,
book_unit_question_id: 2,
description: 'get',
image_sound: null,
correct: true,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:27.000Z,
updated_at: 2019-12-27T19:06:27.000Z
},
'$persisted': true,
'$originalAttributes': {
id: 6,
book_unit_question_id: 2,
description: 'get',
image_sound: null,
correct: true,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:27.000Z,
updated_at: 2019-12-27T19:06:27.000Z
},
'$relations': {},
'$sideLoaded': {},
'$parent': null,
'$frozen': false,
'$visible': undefined,
'$hidden': undefined
},
BookUnitQuestionOption {
__setters__: [
'$attributes',
'$persisted',
'primaryKeyValue',
'$originalAttributes',
'$relations',
'$sideLoaded',
'$parent',
'$frozen',
'$visible',
'$hidden'
],
'$attributes': {
id: 9,
book_unit_question_id: 2,
description: 'stay',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:45.000Z,
updated_at: 2019-12-27T19:06:45.000Z
},
'$persisted': true,
'$originalAttributes': {
id: 9,
book_unit_question_id: 2,
description: 'stay',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:45.000Z,
updated_at: 2019-12-27T19:06:45.000Z
},
'$relations': {},
'$sideLoaded': {},
'$parent': null,
'$frozen': false,
'$visible': undefined,
'$hidden': undefined
},
BookUnitQuestionOption {
__setters__: [
'$attributes',
'$persisted',
'primaryKeyValue',
'$originalAttributes',
'$relations',
'$sideLoaded',
'$parent',
'$frozen',
'$visible',
'$hidden'
],
'$attributes': {
id: 5,
book_unit_question_id: 2,
description: 'are',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:21.000Z,
updated_at: 2019-12-27T19:06:33.000Z
},
'$persisted': true,
'$originalAttributes': {
id: 5,
book_unit_question_id: 2,
description: 'are',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:21.000Z,
updated_at: 2019-12-27T19:06:33.000Z
},
'$relations': {},
'$sideLoaded': {},
'$parent': null,
'$frozen': false,
'$visible': undefined,
'$hidden': undefined
},
BookUnitQuestionOption {
__setters__: [
'$attributes',
'$persisted',
'primaryKeyValue',
'$originalAttributes',
'$relations',
'$sideLoaded',
'$parent',
'$frozen',
'$visible',
'$hidden'
],
'$attributes': {
id: 8,
book_unit_question_id: 2,
description: 'move',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:43.000Z,
updated_at: 2019-12-27T19:06:43.000Z
},
'$persisted': true,
'$originalAttributes': {
id: 8,
book_unit_question_id: 2,
description: 'move',
image_sound: null,
correct: false,
status: false,
user_id: 1,
created_at: 2019-12-27T19:06:43.000Z,
updated_at: 2019-12-27T19:06:43.000Z
},
'$relations': {},
'$sideLoaded': {},
'$parent': null,
'$frozen': false,
'$visible': undefined,
'$hidden': undefined
}
]
当我返回结果并在邮递员中进行测试时，我有以下提示：
[
{
"id": 6,
"book_unit_question_id": 2,
"description": "get",
"image_sound": null,
"correct": true,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:27",
"updated_at": "2019-12-27 16:06:27"
},
{
"id": 9,
"book_unit_question_id": 2,
"description": "stay",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:45",
"updated_at": "2019-12-27 16:06:45"
},
{
"id": 5,
"book_unit_question_id": 2,
"description": "are",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:21",
"updated_at": "2019-12-27 16:06:33"
},
{
"id": 8,
"book_unit_question_id": 2,
"description": "move",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:43",
"updated_at": "2019-12-27 16:06:43"
}
]
答案 0 :(得分：1)
简而言之。 optionsPergunta是指sort()来自Array.prototype.sort()的对象，这意味着您需要在数组上调用sort()。另一件事是sorteiaArray前面没有function，因此解释器虽然应该是函数调用。
const optionsPergunta = {
"options": [
{
"id": 6,
"book_unit_question_id": 2,
"description": "get",
"image_sound": null,
"correct": true,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:27",
"updated_at": "2019-12-27 16:06:27"
},
{
"id": 5,
"book_unit_question_id": 2,
"description": "are",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:21",
"updated_at": "2019-12-27 16:06:33"
},
{
"id": 7,
"book_unit_question_id": 2,
"description": "go to",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:39",
"updated_at": "2019-12-27 16:06:39"
},
{
"id": 8,
"book_unit_question_id": 2,
"description": "move",
"image_sound": null,
"correct": false,
"status": false,
"user_id": 1,
"created_at": "2019-12-27 16:06:43",
"updated_at": "2019-12-27 16:06:43"
}
]
}
function sorteiaArray(){
return Math.random() < Math.random()
}
console.log(optionsPergunta.options.sort(sorteiaArray))
答案 1 :(得分：0)
显然，您不需要对数组进行排序，而是可以对其进行随机排序。
使用返回随机值的比较函数对数组进行排序来改组数组不是一个好主意。对于某些排序算法，它会导致无法保证结束的循环。
如果需要改组数组，则有更好的方法（可能更快）：从数组中随机选择一项，将其从数组中删除，然后将其追加到新的数组（改组后的数组）中。代码看起来像这样：
// Create a new array to not change the original
let source = optionsPergunta.slice();
// Store the shuffled items here
let shuffled = [];
while (source.length) {
let index = Math.floor(Math.random() * Math.floor(source.length));
let items = source.splice(index, 1);
shuffled.push(items[0]);
}