every:一假即假,必須所有都返回true才會返回true譬挚，哪怕有一個false榕暇，就會返回false筋现；
some:一真即真, 只要其中一個為true 就會返回true
let list = [
{name:"aaa",age:3},
{name:"bbb",age:4},
{name:"ccc",age:5},
];
var eve= list.every(function(item){
return item.age > 4
})
console.log(eve)//false;
var some = list.some(function(item){
return item.age > 4
})
console.log(some)//true
