let objA = [{name:a, age:18},{name:b, age:19},{name:c, age:20},{name:d, age:20}]
//数组A
let objB = [{name:a, age:18},{name:b, age:19}]
//数组B
let filterArr = [] // 新数组
for(let i=0; i<objA.length; i++){
let flag = true
for(let j=0;j<objB.length; j++){
if(objA[i].name==objB[j].name){
flag = false
}
}
if(flag){
filterArr.push(objA[i])
}
}