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JScript .NET allows developers to declare variables and functions with type information (e.g., var x : String;), while type information for JScript's variables and functions can not be declared (e.g., var x;). JScript .NET scripts are not interpreted, but executed independently. When executed, a JScript .NET application will invoke the CLR.
Often, consuming code registers a callback for a particular type of event. When that event occurs, the callback is called. Callbacks are often used to program the graphical user interface (GUI) of a program that runs in a windowing system. The application supplies a reference to a custom callback function for the windowing system to call.
Class can extend both custom and built-in classes. Typically custom components would extend built in components (e.g. MyApp.views.ProductsTable would extend built-in Ext.grid.Panel). [10] There is a built-in dynamic loader so classes can have dynamic dependencies (loaded on-demand). There are two types of dependencies in ExtJS.
It is also possible to create a DOM structure from an XML or JSON data, using JavaScript methods to parse the data and create the nodes accordingly. Creating a DOM structure does not necessarily mean that it will be displayed in the web page, it only exists in memory and should be appended to the document body or a specific container to be ...
The data-add-back-btn attribute adds a back button to the page if set to true. Lastly, icons can be added to elements via the data-icon attribute. jQuery Mobile has fifty commonly-used icons built in. A brief explanation of the Data Attributes used in this example: data-role – Specifies the role of the element, such as header, content, footer ...
A Web control, such as a button or label, functions in very much the same way as its Windows counterparts: code can assign its properties and respond to its events. Controls know how to render themselves: whereas Windows controls draw themselves to the screen, web controls produce segments of HTML and JavaScript that form parts of the resulting ...
Types include primitives like integers and strings, and basic data structures such as lists, tuples, and records. Functions have types written with arrows, for example round : Float -> Int. Custom types allow the programmer to create custom types to represent data in a way that matches the problem domain. [24]
For function that manipulate strings, modern object-oriented languages, like C# and Java have immutable strings and return a copy (in newly allocated dynamic memory), while others, like C manipulate the original string unless the programmer copies data to a new string. See for example Concatenation below.