arr1:父数组 arr2子数组
function removePoint(arr1,arr2){
for(let i=0;i<arr2.length;i++){
for(let j=0;j<arr1.length;j++){
if(arr2[i]== arr1[j]{
let index = arr1.indexOf(arr1[j]);
arr1.splice(index,1)
}
}
}
return arr1
}
let arr1 = [1,2,3,4,5,6,7,8,9,10,20,25];
let arr2 = [3,6,9,20]
remoovePoint(arr1,arr2)
输出:[1,2,4,5,7,8,10,25];
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