javascript map foreach

Define map function Map () {this.container = {};} Put Key-value into Map Map.prototype.put = function (key, value) {try {if (key! = null) {This.container[key] = value;}} Cat CH (e) {return e;}};/ /Remove the corresponding value from the MAP according to key Map.prototype.get = function (key,deft) {if (!this.containskey

"Turn" from:http://blog.csdn.net/semanwmj/article/details/7066306 JavaScript is always used for Web pages, and JSON is always used with JavaScript. If you use it recently, write it.Here is a summary:1. Convert the array in JavaScript and {} into JSON string can use Json2.js, source address Https://github.com/douglascrockford/JSON-js.2. To convert a JSON string t

The default object representation of JavaScript {} can be thought of as a Map data structure in another language Dictionary , or a set of key-value pairs.But the JavaScript object has a small problem, which is that the key must be a string. But actually number or other data type as a key is also very reasonable.To solve this problem, the latest ES6 specification

The content of this section is simple, say the Addlayer method of the Map object inside ArcGIS for JavaScript. In the For JS API, the Addlayer method has two types, such as:Addlayer methodIn the Addlayer method there are two parameters, one is a required parameter layer, the other is optional parameter index,layer do not say, can be supported by any kind of layer, focusing on index. The index parameter is u

map Definitions and methodsThe Map () method returns a new array in which the elements of the array are called after the function is processed by the original array element. Map () method processes the elements sequentially, in the order of the original array elements. note: map does not detect an empty

,element.value to get the key and value), and fails to return null + This. Element =function(_index) { - if(_index This. Elements.length) { the return NULL;Bayi } the return This. Elements[_index]; the } - - //determine if the map contains an element of the specified key the This. ContainsKey =function(_key) { the varbln =false; the Try { the for(i = 0; i This. elem

);// Added an interface method for calling html pagesMWebView. addJavascriptInterface (new Object (){// Here I define a method to open the map applicationPublic void startMap (){Intent mIntent = new Intent ();ComponentName component = new ComponentName ("Com. google. android. apps. maps ","Com. google. android. maps. MapsActivity ");MIntent. setComponent (component );StartActivity (mIntent );}}, "Demo ");// Load the pageMWebView. loadUrl ("file: // a

This is a simple for loop in javascript. It declares that the initial I value is 0 and determines whether I is less than 100. If yes, It executes the statement and then increases I by 1. Therefore, vari = 0 is executed only once, and the conditional expression I lt; 100 is executed Each byte of code has its temperature, and we provide a code thermometer. Double-click the source code 123 For (vari = 0; I This is a simple for loop

(key) { + DeleteContainer[key]; A } the}Code test:1 //using put to store values2 varmap=NewMap ();3 4Map.put ("name", "Caoyc");5Map.put ("Age", 25);6Map.put ("Phone", "13700000000");7 8 //get value by Get9document.write ("1: Get Value by Get method ); Tendocument.write ("Name:" +map.get ("name")); Onedocument.write ("); A - //gets the number of key-value pairs stored in the map -document.write ("2: Get the value of a key value pair in a

We are now in five methods that modify an Immutable.map (). Set Update Delete Clear Merge //set ()varMap =Immutable.map ();varTodo ={ID:+NewDate (), Name:"Todo1", Content:"Learning immutable"}map=map.set (todo.id, Todo);varTask =Map.get (todo.id); Console.log (task.content);//"Learning immutable"//UpdatevarMap =Immutable.map ();varTodo ={ID:+NewDate (), Name:"Todo1", Content:"Learning immutable"}

Set Map Road (it is very useful for JSON fulfillment)var a = {};a["Key1"] = "value1"; a["Key2"] = "value2";Since it's a map, there's a way to retrieve the existence of a key. Write like thisif ("Key1" in a) { //something} else { //Something else}A simple sentence declares the key and value of the map in the way:var a = {' Key1 ': ' value1 ', ' key2 ': ' value

The map used in this article is mapMap Online API Addresshttp://union.mapbar.com/apidoc/Offline CHM format Download address:Http://union.mapbar.com/apidoc/chm/mapbarapi.rar Effect Chart: The Mapbar map API allows you to embed Mapbar maps into your own web pages using JavaScript. The API provides a number of ways to interact with maps (as shown on the Http://w

No nonsense, directly affixed to the code. Code One: var map=new map (); Map.put ("A", "a"); Map.put ("B", "B"); Map.put ("C", "C") ; Map.get ("a"); Back: A map.entryset ()//Return Entity[{key,value},{key,value}] Map.containskey (' Kevin ')//return: false function Map () {This.keys = new Array (); This.data = new Object (); /** * Put a key va

This article illustrates the use of array and object to implement a map in JavaScript. Share to everyone for your reference. as follows: Yesterday, I suddenly saw other people using JavaScript to realize the map is very good, but found that there are some problems, by the way perfect, add remove, indexOf, values, clea

For Chinese developers in the creation of GIS applications, often the headache is the lack of basemap resources. In fact, the National Survey and Mapping Bureau to provide a good free resources: heaven and Earth map. Developers using the ArcGIS API can use the resource directly as a basemap for map applications.The ArcGIS JavaScript API has recently launched a ne

Map set implemented by javascript and javascriptmap set A few days ago, the project wanted to use a map set of the same things. It took a while to get the object. Today, I am idle to implement it.Don't laugh Code Var Map = function () {/************ basic variable ***************/var hashmap = {}; var keys = []; var va

This article introduces the Baidu map location of attendance in enterprise ID development. if you need it, refer to this article and use the Baidu map positioning component in enterprise ID development: attendance, however, I found that some mobile phones showed a failure in locating, so I studied Baidu Map. The original Web component Baidu did not intend to upda

); } groups++; Map.setcenter (Data.points[i-1]); //alert ("The Center is the:" + (i-1) + "th point"); } Else{alert ("Data status is not 0"); }} setTimeout (function(){ varConvertor =NewBmap.convertor (); varn = 10; Alert ("The Totall number of points is:" +pointarr.length); varremain = pointarr.length% 10; varRounds = (pointarr.length-remain)/10; Alert (rounds+ "groups of points and" + remain + "points to translate"); v

JS Array iterator function map and filter, you can iterate through the array to produce a new array, and Python's map function is very similar1) filter is to satisfy the condition of the left, is the original array of filtering;2) Map is the processing of the original array, mapped to a new array of one by one mappingsvar xx = [1, 2, 5, 7];function pp (x) {return

One in the mobile phone with Baidu Map JS version to do WebApp bug set1 before using the 2.0 version found that as long as the map added covering, no matter how many, the local map to zoom to a very small extent, will be stuck1.1 Workaround: Reduce version to 1.5 version no more.2 Add Click events when testing custom overlays today, Andorid can trigger a click ev