learn d3 js

the ES6 arrow function. Without a break statement, if you want to terminate prematurely, you must put the foreach () method in a try block and throw an exception.②map ()Passes each element of the called array to the specified function and returns an array that contains the return value of the function.Arr6_5_2 = [2, 4, 33, 111, 99, 66];　　var arr6_5_3 = Arr6_5_2.map (function (x) {return 2*x});　　Each value in the array is Console.log (Arr6_5_3); =>[4, 8, 66, 222, 198, 132]③filter ()Returns a sub

Use of regular expressions in JS function Myvalid () { var errormsg = ""; var res = true; Get the value you want to validate. var receivename = $ ("#receiveName"). Val ();//Name var receivemobile = $ ("#tMobile"). Val ()/mobile number var Validcode = $ ( "#validCode"). Val ()//Verification code var regname =/^[\u4e00-\u9fa5]{2,4}$/;//authentication name var regmobile =/^1[3|4|5|7|8][0-9]\ d{8}$/;//Verification Mobile phone v

A view of the ASP's JavaScript program, convenient for everyone to learn ASP program (JS) http://aspage.yeah.net/------------------------ --------------------from "rainbow drizzle"-------------------------------------------------- Program Author: Rainbow Rain chy.126.com var autotop=new Array () Autotop[1]= "" Autotop[2]= "" Autotop[3]= "" Autotop[4]= "" Autotop[5]= "" var autoend=new Array () Autoend[1]=

1.Open page: window.open ();Close page: Window.close ();2.The timer has a return object that returns the object of this timerSetInterval ();//serial Bomb interval executionSetTimeout ();//Time Bomb delay executionCleaning timersvar sett = setTimeout (function () {Console.log ("settimeout timer");},3000);var sett1 = setinterval (function () {Console.log ("setinterval timer");},1000);function closedsq () {Cleartimeout (sett);//Clear Delay Timer}function closedsq1 () {Clearinterval (SETT1);//clear

); Xhr.send (str); }node. JS:varHTTP = require (' http ');varQueryString = Require (' querystring '));varurl = require (' URL '));varUtil = require (' util ')); Http.createserver (function(req, res) {//Staging request body Information varBODY = ""; //Request LinkConsole.log (Req.url); //whenever the request body data is received, it is added to the postReq.on (' Data ',function(chunk) {body+ = chunk;//be sure to use + = if body=chunk, because the request favicon.ico,body will be equal to {