在数组Javascript中插入或更新对象

var array = [];
var obj = { name: "John", age: 25 };
array.push(obj);

var array = [];
var obj = { name: "John", age: 25 };
array.unshift(obj);

var array = [{ name: "John", age: 25 }, { name: "Jane", age: 30 }];
var obj = { name: "Tom", age: 35 };
array.splice(1, 0, obj); // 在索引为1的位置插入obj对象

var array = [{ name: "John", age: 25 }, { name: "Jane", age: 30 }];
var obj = { name: "Tom", age: 35 };
array[1] = obj; // 更新索引为1的对象

var array = [{ name: "John", age: 25 }, { name: "Jane", age: 30 }];
var obj = { name: "Tom", age: 35 };

var existingObj = array.find(item => item.name === obj.name);
if (existingObj) {
  // 更新对象
  existingObj.age = obj.age;
} else {
  // 插入对象
  array.push(obj);
}