filter somefiltersome

filter

const isBigEnough = value => value >=10;
    let arr = [4,7,8,9,10,23]
    let copyArr = [...arr]//es6 语法复制数组
    let newArr = copyArr.filter(isBigEnough)
    console.log(newArr) //[10, 23]

some

function isBigEnough(element, index, array) {
           return (element >= 10);
} //ES5 的写法
var isBigEnough = element => element>10 // ES6 的写法
let arr = [7,6,3,2,19]
let newArr = arr.some(isBigEnough)
console.log(newArr)//true