Dollar Sign is nothing but it’s an alias for JQuery.
Example
$(document).ready(function(){
});
Over here $ sign can be replaced with “jQuery” keyword.
jQuery(document).ready(function(){
});
Monthly Archives: June 2014
jQuery Starting Point Of Code Execution
The starting point of jQuery code execution is $(document).ready() function which is executed when DOM is loaded.
Overriding
Overloading in oop is same as overloading in real word. In real word overloading means assigning extra work to same machine or person. In oop method overloading is same. By process of method overloading you are asking your method to some extra work. Or in some cases we can say some different work also.
Normally method overloading in oop is managed on the basis of the argument passed in function. We can achieve overloading in oop by providing different argument in same function.
Overriding in php is very easy. As we know that overriding is process of modifying the inherited method. So in case of inheritance you only need to create method with same name in your child class which you want to override.
Overloading
As we know that we can not implement overloading by creating 2 function in with same name in class. So to implement overloading in php we will take help of magic method __call. Magic method __call invoked when method called by class object is not available in class. So here we will not create method exactly and will take help of __call method. Now call method will provide us 2 argument, 1st name of the method called and parameter of the function. Now with the help of either switch , case or if else we will implement overloading in php.
Delete Database
We can delete a database using DROP DATABASE statement.
Syntax :
DROP DATABASE DATABASE_NAME
Example:
mysql> drop database mage;
Query OK, 459 rows affected (36.63 sec)
Object Oriented Programming
Object-oriented programming (OOP) is a programming paradigm based on the concept of “objects”, which are data structures that contain data, in the form of fields, often known as attributes; and code, in the form of procedures, often known as methods. A distinguishing feature of objects is that an object’s procedures can access and often modify the data fields of the object with which they are associated (objects have a notion of “this”). In OO programming, computer programs are designed by making them out of objects that interact with one another. There is significant diversity in object-oriented programming, but most popular languages are class-based, meaning that objects are instances of classes, which typically also determines their type.
JavaScript Errors
There are three types of errors:
- Load time errors: Errors which come up when loading a web page like improper syntax errors are known as Load time errors and it generates the errors dynamically.
- Run time errors: Errors that come due to misuse of the command inside the HTML language.
- Logical Errors: These are the errors that occur due to the bad logic performed on a function which is having different operation.
Javascript blur Function
Blur function is used to remove the focus from the specified object.
Regression Testing
Regression testing is a type of software testing that seeks to uncover new software bugs, or regressions, in existing functional and non-functional areas of a system after changes such as enhancements, patches or configuration changes, have been made to them.
The purpose of regression testing is to ensure that changes such as those mentioned above have not introduced new faults. One of the main reasons for regression testing is to determine whether a change in one part of the software affects other parts of the software.
Common methods of regression testing include rerunning previously completed tests and checking whether program behavior has changed and whether previously fixed faults have re-emerged. Regression testing can be performed to test a system efficiently by systematically selecting the appropriate minimum set of tests needed to adequately cover a particular change.
Smoke Testing
Smoke testing is the initial testing process exercised to check whether the software under test is ready/stable for further testing.
The term ‘Smoke Testing’ is came from the hardware testing, in the hardware testing initial pass is done to check if it did not catch the fire or smoked in the initial switch on.
Prior to start Smoke testing few test cases need to created once to use for smoke testing. These test cases are executed prior to start actual testing to check critical functionalities of the program is working fine. This set of test cases written such a way that all functionality is verified but not in deep. The objective is not to perform exhaustive testing,the tester need check the navigation’s & adding simple things, tester needs to ask simple questions like “Does the program run?”, “Does it open a window?”, or “Does clicking the main button do anything?”