compare two differ between two Array

compare.js

const lastMonthData = [
  {
    id: 1,
    name: "Alex",
    salary: 15662
  },
  {
    id: 2,
    name: "Tom",
    salary: 18672
  },
  {
    id: 3,
    name: "Smith",
    salary: 14001
  }
]
const thisMonthData = [
  {
    id: 1,
    name: "Alex",
    salary: 19901
  },
  {
    id: 2,
    name: "Tom",
    salary: 18672
  },
  {
    id: 3,
    name: "Smith",
    salary: 11001
  }
]

/**
* 只获取薪水增加的员工
* Only get staffs who was increase in salary
**/
const luckyDogs = thisMonthData.filter(tMonth => {
  return lastMonthData.filter(lMonth => {
    return (tMonth.id === lMonth.id && tMonth.salary <= lMonth.salary);
	}).length === 0;
})

/**
* 获取所有调整过员工的信息
**/
const adjustedStaffs = thisMonthData.filter(tMonth => {
  return lastMonthData.filter(lMonth => {
    return (tMonth.id === lMonth.id && tMonth.salary === lMonth.salary);
	}).length === 0;
})



console.log(luckyDogs);
console.log(adjustedStaffs)