假设我有两个数组。第一个数组包含学生详细信息,第二个数组包含学生成绩详细信息。这两个数组都有共同的键,即“学生ID”。
let studentDetails = [
{ studentId: 1, studentName: 'Sathish', gender: 'Male', age: 15 },
{ studentId: 2, studentName: 'kumar', gender: 'Male', age: 16 },
{ studentId: 3, studentName: 'Roja', gender: 'Female', age: 15 },
{studentId: 4, studentName: 'Nayanthara', gender: 'Female', age: 16},
];
let studentMark = [
{ studentId: 1, mark1: 80, mark2: 90, mark3: 100 },
{ studentId: 2, mark1: 80, mark2: 90, mark3: 100 },
{ studentId: 3, mark1: 80, mark2: 90, mark3: 100 },
{ studentId: 4, mark1: 80, mark2: 90, mark3: 100 },
];
我想根据“studentId”键将两个数组合并。我创建了一个函数来合并这两个数组。
const mergeById = (array1, array2) =>
array1.map(itm => ({
...array2.find((item) => (item.studentId === itm.studentId) && item),
...itm
}));
以下是获得最终结果的代码
let result = mergeById(studentDetails, studentMark)
;
[
{"studentId":1,"mark1":80,"mark2":90,"mark3":100,"studentName":"Sathish","gender":"Male","age":15},{"studentId":2,"mark1":80,"mark2":90,"mark3":100,"studentName":"kumar","gender":"Male","age":16},{"studentId":3,"mark1":80,"mark2":90,"mark3":100,"studentName":"Roja","gender":"Female","age":15},{"studentId":4,"mark1":80,"mark2":90,"mark3":100,"studentName":"Nayanthara","gender":"Female","age":16}
]