从字符串数组中筛选对象数组

const stringArray = ["John,25,New York", "Alice,30,Los Angeles", "Bob,35,San Francisco"];
const objectArray = [];

for (let i = 0; i < stringArray.length; i++) {
  const fields = stringArray[i].split(",");
  const obj = {
    name: fields[0],
    age: parseInt(fields[1]),
    city: fields[2]
  };
  objectArray.push(obj);
}

console.log(objectArray);

[
  { name: "John", age: 25, city: "New York" },
  { name: "Alice", age: 30, city: "Los Angeles" },
  { name: "Bob", age: 35, city: "San Francisco" }
]

const filteredArray = [];

for (let i = 0; i < objectArray.length; i++) {
  if (objectArray[i].age >= 30) {
    filteredArray.push(objectArray[i]);
  }
}

console.log(filteredArray);

[
  { name: "Alice", age: 30, city: "Los Angeles" },
  { name: "Bob", age: 35, city: "San Francisco" }
]