（1）.普通方法： ``` var arr = [12,1,10,11,64,21,78,9]; var temp = []; for(var i = 0; i <arr.length;i++){ if(arr[i]%2==0){ temp.push(arr[i]); } } console.log(temp); //[12, 10, 64, 78] ``` （2）.filter筛选方法： ``` ar arr = [12,1,10,11,64,21,78,9]; var b=arr.filter(x=>(x%2==0)); console.log(b); //[12, 10, 64, 78] ```