sort 排序

var points = [40,100,1,5,25,10];
points.sort(function(a,b){return a-b});

search 查找

var str="Visit Runoob!"; 
var n=str.search("Runoob");

filter 筛选

var ages = [32, 33, 16, 40];
function checkAdult(age) {
    return age >= 18;
}
function myFunction() {
    document.getElementById("demo").innerHTML = ages.filter(checkAdult);
}

find 查找

var ages = [3, 10, 18, 20];
function checkAdult(age) {
    return age >= 18;
}
function myFunction() {
    document.getElementById("demo").innerHTML = ages.find(checkAdult);
}