使用JavaScript更新对象数组？
假设以下是我们的对象数组-
var studentDetails = [
{ firstName: "John", listOfSubject: ['MySQL', 'MongoDB']},
{firstName: "David", listOfSubject: ['Java', 'C']
}]我们需要在已创建的对象数组中添加以下内容：
{firstName: "Bob", listOfSubject: ['JavaScript']};示例
var studentDetails = [
{ firstName: "John", listOfSubject: ['MySQL', 'MongoDB']},
{firstName: "David", listOfSubject: ['Java', 'C']}];
updateThisObject = {firstName: "Bob", listOfSubject: ['JavaScript']};
function forLoopExample(studentObjects, updateObj){
for(var index = 0;index < studentObjects.length; index++) {
if(updateObj.listOfSubject.join("") ===
studentObjects[index].listOfSubject.join("")) {
studentObjects[index] = updateObj;
return;
}
}
studentObjects.push(updateObj);
}
forLoopExample(studentDetails, updateThisObject);
console.log(studentDetails);要运行上述程序，您需要使用以下命令-
node fileName.js.
在这里，我的文件名为demo100.js。
输出结果
这将产生以下输出-
PS C:\Users\Amit\JavaScript-code> node demo100.js
[
{ firstName: 'John', listOfSubject: [ 'MySQL', 'MongoDB' ] },
{ firstName: 'David', listOfSubject: [ 'Java', 'C' ] },
{ firstName: 'Bob', listOfSubject: [ 'JavaScript' ] }
]