Enum is a predefined list of values which do not represent some kind of numeric or textual data. You can use enums when a variable can only take ...
Posts tagged Self Study
adb on terminal
In Android/sdk/platform-tools, there is adb call. adb devices able to see connected device on mine, emulator is running as shown adb shell ...
Android File Components
Describes what the application is about activities Android studio auto save the contents to here Best place to check what’s going on the app ...
Architecture Breakdown
Linux Kernel Interacts with Android hardware and contains all the essential hardware drivers. Also provides abstraction layer between software ...
extends (and super) vs. implements
extending a class A extends B Both classes or both interfaces extends parent class’ already defined methods Also possible to override the methods ...
CodeIgniter
Famous Framework using php MVC Model: interacts with database View: Presentation side Controller: Intermediary between model and view
Interface vs. Abstract class vs. Concrete class
uses “implements” to be implemented multiple interfaces can be implemented interface can extends only interface uses “extends” to be extended if ...
final
Variable Variable cannot be changed Method Method cannot be modified Class Nobody can extend this class That means, no body can override methods ...
super vs. this
super : used to access methods of the base class this : used to access methods of the current class The third line is printing “animal : eat” ...
http vs. https (and SSL)
transfer hypertext data port: 80 Secure called webpage and data But slower the transferring speed Port: 443 Encryption: Hiding what is sent from ...