对二维数组去重

 test(){
   //JSON.stringify转成字符串，就可以去重了，前提是数据格式是严格
const data =[{name:1,age:1},{name:2,age:2},{name:1,age:1},{name:2,age:2}]
const ChangeArr = (data) => {
  const newdata = data.map(item => (JSON.stringify(item)))
  return [...new Set(newdata)]
}
console.log(ChangeArr(data))