我想以一种非常具体的方式修改 Javascript 中的数组，但我不知道如何

Question

所以这是我的数组：

0: {universityYear: 'Anul universitar 2022-2023', name: 'Pimpulsul'}
1: {universityYear: 'Anul universitar 2021-2022', name: 'Evrikaul'}
2: {universityYear: 'Anul universitar 2021-2022', name: 'Po'}

我想获得：

0: {universityYear: 'Anul universitar 2022-2023', name: ['Pimpulsul'] }
1: {universityYear: 'Anul universitar 2021-2022', name: ['Evrikaul', 'Po'] }

Answer 1

您可以使用reduce ：

 let arr = [ {universityYear: 'Anul universitar 2022-2023', name: 'Pimpulsul'}, {universityYear: 'Anul universitar 2021-2022', name: 'Evrikaul'}, {universityYear: 'Anul universitar 2021-2022', name: 'Po'} ]; let newArr = arr.reduce((out, cv, ci, re) => { let targetIndex = out.findIndex(item => item.universityYear == cv.universityYear); if(targetIndex > -1) out[targetIndex].name.push(cv.name); else out.push({...cv, name: [cv.name]}) return out; }, []); console.log(newArr)