![](/img/trans.png)
[英]Sum values of array of object grouped by keys and return into a new array of arrays
[英]return a new object with keys from array
我正在嘗試從下面的people
數組中創建一個新對象,使用born
作為鍵,其中包含該年出生的所有人員:
const newObject = {
'1971': {
male: [ [Object], [Object] ],
female: [ [Object] ]
},
'1972': {
male: [ [Object], [Object] ],
female: [ [Object] ]
}
}
到目前為止,這是我的代碼:
people.map(person => {
let {
born,
sex
} = person;
newPeople[born] = sex == "male" ? {
male: Array.isArray(male) && array.length ? male.push(person) : [],
female: Array.isArray(female) && female.length ? female.push(person) : []}
})
人群:
const people = [{
name: 'Jim',
sex: 'male',
born: '1971',
address: {
town: 'London',
},
},
{
name: 'Bob',
sex: 'male',
born: '1971',
address: {
town: 'London',
},
},....
jsfiddle 設置在這里: https ://jsfiddle.net/jw9n3bmr/
以下是針對您想要執行的操作使用reduce
的解決方案:
const people = [{ name: 'Jim', sex: 'male', born: '1971', address: { town: 'London', }, }, { name: 'Bob', sex: 'male', born: '1971', address: { town: 'London', }, } ]; const result = people.reduce((acc, currVal) => { (acc[currVal.born] || (acc[currVal.born] = { male: [], female: [] }))[currVal.sex].push(currVal); return acc; }, {}); console.log(result);
我希望這會有所幫助。
const getItems = (array, key, value) => {
let items = [];
array.forEach((k, o) => { if (o[key] === value) items.push(o) });
return items;
};
console.log(getItems(people, "born", "1971"));
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