SEARCH KEYWORD -- white space
Optional arguments in PHP function
In PHP, we can define our own functions which can accept optional number of arguments. In this kind of functions, the optional argument should be set with default value.Fox example, the next code example will illustrate this:<?php function func($name,$type=NULL) { echo "$name $type"; } func("Hello"); echo "<br />"; func("Hello","world"); echo "<br />";?>Here $type is an optional argument. It must be set with a default value either NULL or some other value. Quite simple....
PHP,optional,arguments,user defined func 2011-03-28 12:35:20
JSP connect MySQL
To connect MySQL with Java Server Page(JSP). Some steps should be followed:Step 1: Download MySQL JDBC connector driver from the Internet. URL: http://dev.mysql.com/downloads/connector/j/Step 2: Put the jar file downloaded in Step 1 in the Tomcat common lib folder and add this jar file to the CLASSPATH so that the JSP page can find the specified class.Step 3: Create the JSP page with MySQL connection : Example is shown below: <% String driver="com.mysql.j...
MySQL,JSP,Connection,Driver,Download 2011-05-11 10:04:57
Permutation algorithm with JavaScript
In secondary school, we have learned permutation. Basically, for n numbers, the number of permutations for these n numbers can be calculated to n! which is called 'n factorial'. But to display all the permutations on the screen, we need to use a recursive function. The problem is how to write this function. Next I write a program to display the permutations for n numbers with JavaScript. First, we need to understand that from these n numbers, we can first take any one number from it, and t...
JavaScript,Permutation,Algorithm,Impleme 2011-09-21 12:02:35
Read white space with scanf()
Usually, when we want to enter string with white spaces in C, we need to call gets() or fgets(0 method. We usually will not use scanf(0 or fscanf() because they cannot accept white spaces when scan user inputs. But when we specify the format in scanf() function, we may read strings with white space. the code section below illustrate this: #include <stdio.h> int main(int argc,char **argv){ char name[30]; fprintf(stdout,"Please en...
C,scanf,white space, string format 2011-09-26 11:45:43
CSS box-shadow Can Slow Down Scrolling
Working on one of the Chromebooks Google lets you borrow on Virgin America flights, I noticed scrolling down the page on my airbnb.com dashboard was much slower than on my normal laptop. I chalked it up to weak Chromebook hardware, but other sites were scrolling just fine. box-shadow had caused slow scrolling on our search results page before, so I did some investigation.I used Chrome's Timeline tab to see the duration of paint events on the page. Before each test I forced a garbage collection a...
CSS,box-shadow,performance,Timeline,Chromebook 2011-11-13 08:13:48
Hash Tables in Javascript
IntroductionHash tables are a permutation of associative arrays (i.e. name => value pairs). If you use PHP, then you are very familiar with this type of data structure already since all PHP arrays are associative.The Javascript language implements very loose and somewhat limited support for associative arrays. Any JavaScript array can use other objects as keys, making it a hash, but there exists no formal constructor for initializing them and it is more or less unweildy to work with. A short ...
JavaScript,Hashtable,Implementation,Array 2011-11-26 02:43:40
Android IDE gets Pie-Friendly Update
An integrated development environment (IDE) provides facilities to computer programmers for software development. It consists of a source code editor, builds automation tools, and a debugger. The aim of the IDE is to reduce the configuration necessary to piece together multiple development utilities.The android application development process has become easier with the advancement of the new technologies. There are many considerations that are taken into account before developing an application....
Android and Security
The last year has been a phenomenal one for the Android ecosystem. Device activations grew 250% year-on-year, and the total number of app downloads from Android Market topped 11 billion. As the platform continues to grow, we’re focused on bringing you the best new features and innovations - including in security.Adding a new layer to Android securityToday we’re revealing a service we’ve developed, codenamed Bouncer, which provides automated scanning of Android Market ...
Android,Security,Android Apps,App market,Bouncer 2012-02-03 08:03:51
Code coverage rate
When doing unit testing, the code coverage rate is often used as the criteria for measuring testing performance, even in some cases code coverage may be used to consider whether the testing task is completed or not. So testers need to spend much time on designing test cases which can cover as many codes as possible. There are advantages and disadvantages about using code coverage rate. First let's check what is code coverage rate: code coverage rate= the degree of code coverage in testing. There...
Unit testing,Code coverage 2013-04-16 12:50:57
The tips of learning Linux kernel
As the Linux kernel has become one of the most gigantic and complex software project in the world, its complication scare many novices away. In this post, I will give some personal experience on how to learn Linux kernel, and hope these tips can offer some help to newcomers. (1) Download vanilla kernel and install it. Yes, I suggest you can find a physical machine, or if you really don’t have one at hand, virtual machine is also OK. Download the newest vanilla k...
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