![]() ![]() We've taken a look at the syntax, parameters and usage of the method through practical examples. The method iterates through an array, applying a function to each element of the array and returning the new sequence of elements as a new array. In this guide, we've taken a look at the map() method in JavaScript. Let newScores = Object.values(scores).map( ( score) => score + 5) Ĭonsole.log(newScores) // Conclusion Assume we have a set of scores and wish to add 5 points to each one to assist increase the scores: const mathScores = įor ( let i = 0 i < mathScores.length i++) Let's go through the for-loop syntax and see how we may apply certain methods to each element. In this guide, you'll learn how to work with JavaScript's map() method and how it works, on practical code examples. Like most language, JavaScript has an efficient implementation of the map operation, and it's built into the Array class. You can use the OnInitialize event RadMap exposes to get the JSON literal that will be passed to the Kendo Map widget and modify it according to some custom logic (e.g., some configuration that has not been done on the server for any reason).You can utilize the full Kendo Map API to build the desired options object according to your needs.This object is only available through the event arguments object of this event and is not available in later events.Įxample 5: Add a new markers layer to the map options before the widget initializes.Note: Applying a function to each element of a sequence, and returning the transformed result into a new sequence is known as mapping, where each element of the original sequence, Ex, maps to a potentially transformed element of the new sequence, Exi. Get Options Object Passed to the kendoMap() Constructor You can find an example of several of the map's events being handled in the Client-side API online demo. ![]() ![]() Create an XMLHttpRequest object Define a callback function Open the XMLHttpRequest object Send a Request to a server The XMLHttpRequest Object All modern browsers support the XMLHttpRequest object. Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load AJAX - The XMLHttpRequest Object Previous Next The keystone of AJAX is the XMLHttpRequest object. Protected void Page_Load(object sender, System.EventArgs e) Its full API and events are available at this point.Įxample 4:: Attach client-side Map events in the markup and in the code-behind. OnLoad-fires when the RadMap client-side object is instantiated. You can find a simple demonstration in Example 5. The methods and events of the map are not available yet because the Kendo Map is not yet created. You can use it to apply modifications to the options JSON object. OnInitialize-fires before the serialized settings from the server are passed to the kendoMap() constructor as options. They receive two arguments - the RadMap and event arguments objects. There are two additional events that are specific to the nature of the ISciptControl. You can find examples of attaching and using the events in Example 4. The handler receives the Kendo Map event arguments. The server property only takes the handler function name as a string. The event name is constructed by concatenating On with the Kendo Map event name in PascalCase. RadMap exposes the Kendo Map client-side events in its markup (and, respectively, code-behind), via the inner tag (class). Map.center() //a simple array is used as argument () The get () method returns a specified element from a Map object. Negative values are west of the Greenwich meridian Var longitude = 20 //this can be a float number. Var latitude = 30 //this can be a float number. ![]()
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