By Paul Grice
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* event the simplicity of jQuery cellular for development cross-browser functions
* learn the way Sencha Touch’s structure, widgets, and blazing-fast rendering engine makes it a sensible choice for firm software program
* Use PhoneGap to package deal your internet app right into a local iOS, Android, or home windows cellphone program
* realize the effect of varied HTML5 positive factors on cellular app improvement
* try out and debug your app with a suite of assistance, methods, and instruments
* research why literal notation styles are less complicated possible choices to capabilities
* Create items that transcend the fundamental styles of utilizing item literals and services
* study styles that follow in particular to the client-side browser surroundings
The e-book explains the XMPP protocol and its many makes use of in addition to what kinds of difficulties it solves most sensible. 9 functions are built in expanding complexity, beginning with an XMPP-based “Hello, World” instance and finishing with a real-time, multi-user gaming method for Tic-Tac-Toe.
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Additional resources for Actions and Events
And metaclasses As shown in Figure 2-8, there are usually multiple objects belonging to a given class. The class objects define the structure and behavior of the objects. , the class variables) and the behavior of the class object C. , class and metaclass objects always exist in pairs. As metaclasses again are classes and since every class is an object, metaclasses are also objects and consequently belong to yet another class. This would lead to an infinite regression of class objects and metaclasses.
Rectangles are not points. A point is a mathematical concept, but a rectangle is a figure that can have various visual attributes. Windows are not rectangles . They are not used as graphic shapes, but rather as areas that can be filled which graphic shapes. In all three cases, a has-a relation would have been more appropriate. For example, a stack could have an instance variable of type List that holds the elements, and a window could have a rectangle describing the location and size of the window on the screen.
For example, the message borderWidth (without a colon) returns the line width that will be used when the rectangle is drawn on the screen; the message borderWidth: (with a colon) is used to modify this attribute. We will use this naming convention throughout this book, except when different message names are more appropriate, as is the case with moveTo:, moveBy: and origin. The message moveTo: interprets the argument as absolute coordinates, whereas moveBy: moves the rectangle relative to its current position.
Actions and Events by Paul Grice