箭头函数
const fnc = (n, m) => {
console.log(m);
return n + 1;
}
console.log(fnc(1,2));
const arr=[1,2,3,4,5,6,7]
//普通定义一个方法
const arr1=arr.filter(function(item){
return item%2
})
console.log(arr1);
//箭头函数
const arr2=arr.filter(i=>i%2)
console.log(arr2);