JavaScript两个数组对比差集

JavaScript两个数组对比差集

subSet(arr1, arr2) {
    
    
        var arr = [];
        for(var i=0;i<arr1.length;i++){
    
    
            if(arr2.indexOf(""+arr1[i]) < 0){
    
    
                arr.push(arr1[i]);
            }
        }
        return arr;
    },
    let a = [1,2,3]
    let b = [1,3]
    this.subSet(a,b) //[2]