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Going Simple with JavaScript
I was making a change to a page that needed to pull from a remote API and make changes to various parts of the page. Sounds like the time to pull out jQuery and Ajax, doesn't it? Instead, I just used old fashioned JavaScript. Actually, I used new fashioned JavaScript. Browsers haven't stood still in the advent of libraries and frameworks. As a result, we can take advantage of those features when we need to bake in a little extra. Some JSONP The first step was to get the JSONP call execu...
JavaScript,new version,new addition,JSONP,querySelectorAll 2012-03-06 05:22:59
Remote form submission
Remote form submission is way of submitting HTML forms from local to a particular remote server. This is used by many advertisers, spammers or even hackers to submit bad data to other websites in order to get what they want. They can write some automation scripts to help them do spamming. How can people do remote form submission and how to prevent this kind of attacks? Since a website can be accessed by almost every one, so one can save a local copy of a HTML form of a website through File->S...
PHP,Security,Remote form submission 2013-07-14 01:04:49
Understanding abstract interface in Java
Have you read about an interface declaration as public abstract interface InterfaceName in Java? At the first glance, is it a weird declaration? Why should we declare an interface as abstract? For example, we may see below code in some projects: public abstract interface MyInterface { public void check(); public abstract boolean check(boolean really); } Actually here abstract is redundant, an interface is implicitly abstract, we no need to put an abstract in front of interface. But it do...
Java,abstract interface 2014-08-18 23:07:27
Load and execute JavaScript
When we load and execute JavaScript in a webpage, there are many points we need to care about because of its design and feature. There are two features about JavaScript execution in a browser: 1). The JavaScript codes will be executed immediately once loaded;2). When JavaScript codes are being executed, they will block the following contents (including page rendering and other resources downloading). So if there are multiple js files to be loaded, these codes will be executed sequentially. Since...
JavaScript,async,defer,load,execute 2013-06-07 04:53:46
Remove duplicated elements in JavaScript array
During interviews, one frequent question asked would be something like how to remove duplicated elements in a JavaScript array and how many different ways you can think of. The interviewee would also be asked to write the code down. In real applications, normally front end would not need to handle this case since normally it would be done by backend, but still it's necessary for front end developers to know different ways of doing this. This post will share some of the common ways to remove dupl...
JAVASCRIPT,ARRAY,DUPLICATED ELEMENT 2018-09-21 22:32:10
Features of Google Android 4.1 Jelly Bean
In today's Google IO 2012 in San Francisco, Google announced its new Android system Android 4.1 Jelly Bean. It's a whole new Android OS and many new features are added to it. Let's check out what new features are added to Jelly Bean.1. Projector ButterIt uses VSync and Tripple buffering to improve the interactivity experience and increase frame rate. It makes Jelly Bean the fastest and smoothest Android ever2. New home screenYou can customize the home screen. You can re-size the home scree...
Android, Google IO, Android 4.1, Kelly Bean 2012-06-27 12:49:49
Sort an array with only one local variable
Array sorting algorithm question is frequently asked during technical interviews. There are lots of sort algorithms including bubble sort, selection sort, insertion sort, quick sort, merge sort etc. Usually interviewees will be asked to implement sort algorithms. But have you ever been asked to sort an array which you are allowed to define ONLY ONE local variable in your algorithm? Bubble sort can be used to do this actually. Normally a bubble sort algorithm may need three local ...
JAVASCRIPT,ALGORITHM,SORTING,BUBBLE SORT 2016-10-07 09:46:49
Should we use Abstract class or Interface?
When we write programs, we may often get into a situation where we don't know whether we should use Abstract class or Interface when we want to define an abstract object. These two are very similar and they are interchangeable in many cases. On Stackoverflow, this question is asked lots of times and it's related to many programming languages. Also in the official documentation of PHP regarding the Abstract class and Interface, people are arguing about this. To understand this question, their dif...
DIFFERENCE,INTERFACE,ABSTRACT CLASS,COMPARISON,OOP 2013-04-15 11:44:36
Solution to IE setAttribute style problem
In IE7, the JavaScript setAttribute("style","attributes") doesn't work, but it works in IE 8 and other web browsers. To solve the STYLE problem in IE 7 we can use a workaround method.we can use element.style.cssText = 'color:#FF0000;';in IE 7 instead ofelement.setAttribute('style','color:#FF0000;'); ...
JavaScript,Style,setAttribute, IE,Not work,Solution 2011-11-21 12:00:27
Check whether a remote server port is open on Linux
As a system administrator or network engineer or application developer, there is a need to check whether a port on remote server is open so that you can tell whether the service under check is running or not. In this post, we would cover a few methods to check whether a remote server port is open or not on Linux. telnet telnet is the most frequently used command on both Windows and Linux to check port. The simple usage for this command is telnet [host] [port] When the port is open, the o...
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