英文:
How to merge map result in to one array objects?
问题
重构后的对象结果处理函数在同一时间正常工作，但映射结果未以一个数组组的形式显示。
{
"ageRange": [
{
"question": "ageRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
},
{
"question": "picAgeRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
],
"goal": [
{
"question": "goal",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
],
"hairColor": [
{
"question": "hairColor",
"lastUpdated": "2018-07-09T18:13:49.567",
"info": null,
"type": "SELECT"
},
{
"question": "picHairColor",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
}
现有结果是：
[
{
"ageRange": [
{
"question": "ageRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
},
{
"question": "picAgeRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
},
{
"goal": [
{
"question": "goal",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
},
{
"hairColor": [
{
"question": "hairColor",
"lastUpdated": "2018-07-09T18:13:49.567",
"info": null,
"type": "SELECT"
},
{
"question": "picHairColor",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
}
]
期望的结果是：
{
"ageRange": [
{
"question": "ageRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
},
{
"question": "picAgeRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
],
"goal": [
{
"question": "goal",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
],
"hairColor": [
{
"question": "hairColor",
"lastUpdated": "2018-07-09T18:13:49.567",
"info": null,
"type": "SELECT"
},
{
"question": "picHairColor",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
}
英文:
The object result restructuring function works fine at the same time the map result not coming in one array group.
<!-- begin snippet: js hide: false console: true babel: true -->
<!-- language: lang-js -->
console.clear();
const filterList = {
ageRange: ["ageRange", "picAgeRange"],
goal: ["goal", "motivation"],
hairColor: ["hairColor", "picHairColor"]
};
const questionList = [{
question: "ageRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "18-30",
selected: true
},
{
value: "31-35",
selected: false
},
{
value: "36-45",
selected: false
},
{
value: "46-55",
selected: false
},
{
value: "55+",
selected: false
}
]
},
{
question: "picAgeRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "country 6",
selected: true
},
{
value: "smart casual 4",
selected: false
},
{
value: "dark denim 6",
selected: false
},
{
value: "sporty 6",
selected: false
},
{
value: "adventure 5",
selected: false
},
{
value: "prints 5",
selected: false
},
{
value: "excentric 5",
selected: false
},
{
value: "dont like any private style",
selected: false
}
]
},
{
question: "goal",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "save time",
selected: true
},
{
value: "personal advice",
selected: false
},
{
value: "inspiration",
selected: false
},
{
value: "testing the service",
selected: false
}
]
},
{
question: "hairColor",
lastUpdated: "2018-07-09T18:13:49.567",
info: null,
type: "SELECT",
answers: [{
value: "blond",
selected: true
},
{
value: "brown",
selected: false
},
{
value: "black",
selected: false
},
{
value: "red",
selected: false
},
{
value: "grey",
selected: false
},
{
value: "noHair",
selected: false
}
]
},
{
question: "picHairColor",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "suit 3",
selected: true
},
{
value: "business casual",
selected: false
},
{
value: "casual",
selected: false
},
{
value: "have to wear uniform",
selected: false
},
{
value: "classic",
selected: false
},
{
value: "conservative",
selected: false
},
{
value: "relaxed 2",
selected: false
},
{
value: "dont like any work style",
selected: false
}
]
}
];
const ofQuestionsList = Object.entries(filterList).map(
([questionKey, questionNames]) => {
return {
[questionKey]: questionList.filter((item) =>
questionNames.includes(item.question)
)
};
}
);
console.log(ofQuestionsList);
<!-- end snippet -->
The existing result is
[
{
"ageRange": [
{
"question": "ageRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
},
{
"question": "picAgeRange",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
},
{
"goal": [
{
"question": "goal",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
},
{
"hairColor": [
{
"question": "hairColor",
"lastUpdated": "2018-07-09T18:13:49.567",
"info": null,
"type": "SELECT"
},
{
"question": "picHairColor",
"lastUpdated": "2018-07-09T18:13:42.541",
"info": null,
"type": "SELECT"
}
]
}
]
The expecting result is
{
"ageRange":[
{
"question":"ageRange",
"lastUpdated":"2018-07-09T18:13:42.541",
"info":null,
"type":"SELECT"
},
{
"question":"picAgeRange",
"lastUpdated":"2018-07-09T18:13:42.541",
"info":null,
"type":"SELECT"
}
],
"goal":[
{
"question":"goal",
"lastUpdated":"2018-07-09T18:13:42.541",
"info":null,
"type":"SELECT"
}
],
"hairColor":[
{
"question":"hairColor",
"lastUpdated":"2018-07-09T18:13:49.567",
"info":null,
"type":"SELECT"
},
{
"question":"picHairColor",
"lastUpdated":"2018-07-09T18:13:42.541",
"info":null,
"type":"SELECT"
}
]
}
答案1
得分: 3
Array.prototype.map() 返回一个数组，对于您的情况，如果我理解正确，您希望将元素分组并将它们作为一个结果对象返回。
这似乎可以通过使用 Array.prototype.reduce() 来实现，所以您可以这样做：
const ofQuestionsList = Object.entries(filterList).reduce(
(acc, [questionKey, questionNames]) => {
return {
...acc,
[questionKey]: questionList.filter((item) =>
questionNames.includes(item.question)
)
};
}, {});
这个 reduce 接受两个参数，一个回调函数，它接收 accumulator（累加器）和正在处理的数组中的 current element（当前元素）。并且初始化累加器为一个空对象 {}。
然后，在每次迭代中，我们都返回一个合并了迭代器的先前值和当前值的对象。
英文:
Array.prototype.map() returns an array, for your case if I understood correctly you want to group your elements and return them in one results object.
This seems like something that can be achieved with Array.prototype.reduce(), so you would have:
const ofQuestionsList = Object.entries(filterList).reduce(
(acc, [questionKey, questionNames]) => {
return {
...acc,
[questionKey]: questionList.filter((item) =>
questionNames.includes(item.question)
)
};
}, {});
This reduce takes 2 parameters, a callback taking the accumulator and your current element that being processed in your array. And the accumulator's initialization with an empty object {}.
Then in each iteration we return a merged object with the previous values of the iterator, and the current one
<!-- begin snippet: js hide: false console: true babel: true -->
<!-- language: lang-js -->
console.clear();
const filterList = {
ageRange: ["ageRange", "picAgeRange"],
goal: ["goal", "motivation"],
hairColor: ["hairColor", "picHairColor"]
};
const questionList = [{
question: "ageRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "18-30",
selected: true
},
{
value: "31-35",
selected: false
},
{
value: "36-45",
selected: false
},
{
value: "46-55",
selected: false
},
{
value: "55+",
selected: false
}
]
},
{
question: "picAgeRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "country 6",
selected: true
},
{
value: "smart casual 4",
selected: false
},
{
value: "dark denim 6",
selected: false
},
{
value: "sporty 6",
selected: false
},
{
value: "adventure 5",
selected: false
},
{
value: "prints 5",
selected: false
},
{
value: "excentric 5",
selected: false
},
{
value: "dont like any private style",
selected: false
}
]
},
{
question: "goal",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "save time",
selected: true
},
{
value: "personal advice",
selected: false
},
{
value: "inspiration",
selected: false
},
{
value: "testing the service",
selected: false
}
]
},
{
question: "hairColor",
lastUpdated: "2018-07-09T18:13:49.567",
info: null,
type: "SELECT",
answers: [{
value: "blond",
selected: true
},
{
value: "brown",
selected: false
},
{
value: "black",
selected: false
},
{
value: "red",
selected: false
},
{
value: "grey",
selected: false
},
{
value: "noHair",
selected: false
}
]
},
{
question: "picHairColor",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT",
answers: [{
value: "suit 3",
selected: true
},
{
value: "business casual",
selected: false
},
{
value: "casual",
selected: false
},
{
value: "have to wear uniform",
selected: false
},
{
value: "classic",
selected: false
},
{
value: "conservative",
selected: false
},
{
value: "relaxed 2",
selected: false
},
{
value: "dont like any work style",
selected: false
}
]
}
];
const ofQuestionsList = Object.entries(filterList).reduce(
(acc, [questionKey, questionNames]) => {
return {
...acc,
[questionKey]: questionList.filter((item) =>
questionNames.includes(item.question)
)
};
}, {});
console.log(ofQuestionsList);
<!-- end snippet -->
答案2
得分: 0
管理结果
console.clear();
const result = [{
ageRange: [{
question: "ageRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
},
{
question: "picAgeRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}
]
},
{
goal: [{
question: "goal",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}]
},
{
hairColor: [{
question: "hairColor",
lastUpdated: "2018-07-09T18:13:49.567",
info: null,
type: "SELECT"
},
{
question: "picHairColor",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}
]
}
];
var newObj = result.reduce((a, b) => Object.assign(a, b), {})
console.log(newObj)
英文:
Manage with result
<!-- begin snippet: js hide: false console: true babel: true -->
<!-- language: lang-js -->
console.clear();
const result = [{
ageRange: [{
question: "ageRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
},
{
question: "picAgeRange",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}
]
},
{
goal: [{
question: "goal",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}]
},
{
hairColor: [{
question: "hairColor",
lastUpdated: "2018-07-09T18:13:49.567",
info: null,
type: "SELECT"
},
{
question: "picHairColor",
lastUpdated: "2018-07-09T18:13:42.541",
info: null,
type: "SELECT"
}
]
}
];
var newObj = result.reduce((a, b) => Object.assign(a, b), {})
console.log(newObj)
<!-- end snippet -->
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