This code snippet deletes a substring from a original string.. /** initialize two strings **/ NSString *string = @”This is heaven”; NSString *part = @”heaven”; /** Get the range of the substring in the original string **/ NSRange range = [string rangeOfString:part]; /** Delete the substring from the original string **/ [string deleteCharactersInRange:range]; Please leave… Read More »
Sometimes we may need to have a sound when we hover over something, i.e when a tooltip appears. Actually this can be done easily by adding an eventListener to the corresponding control. Take a look at the example. This line is the important line. myLabel.addEventListener(ToolTipEvent.TOOL_TIP_SHOW, myListener); The function myListener gets called when we hover over… Read More »
Hi, Let’s see how encapsulation can be implemented using properties in C#.NET/ASP.NET. Let’s see the code first. using System; public class Student { private int stud_id = -1; public int ID { get { return stud_id; } set { stud_id = value; } } private string stud_name = string.Empty; public string Name { get {… Read More »
Often we see alerts with text message or title in it. But actually we can customize alerts. We can place any views inside it. We can place a textView(TextField) , imageView etc in it. Take a look at this simple example that places a textbox inside an alertView. UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@”Title goes… Read More »
GridViews are those in which you can arrange elements in a two dimensional grid. It is what you see in the gallery where images are arranged. Here images are arranged in a two dimensional grid. Copy the below code and save it as “MyGridView.java” Now create another file named “Images.java” and copy the below code… Read More »
In android there are different layouts and we often confuse about which one to use. Even if we select one, it is little complicated. So this tutorials is to show you about the TableLayout Here i first created linear Layout in which a Table Layout is added Here you can see that the first row… Read More »
We usually see only alerts with text only, but in Adobe AIR and FLEX we can have alerts with our images in it. That’s really cool right. Take a look at this simple example. It places an image in the alert. Make sure that you have the image named “alert_image.png” in your “src” folder or… Read More »
Hi, In some special cases you may need to disable the Right Click option on HTML page you are using. An easy way to do it using jQuery is follows. Use the following code in the HTML page where you want to disable Right Click. $(document).ready(function(){ $(document).bind(“contextmenu”,function(e){ return false; }); }); 🙂
If you want to round a decimal number using SQL, use the ROUND() function of SQL. Syntax: SELECT ROUND(column_name,decimals) FROM table_name eg: SELECT itemName, ROUND(Price,2) as Price FROM Purchase It will select itemName and Price from the table ‘Purchase’ and will Round the Price with 2 decimal places. 🙂
Hi, In order to sort elements in ArrayList using ASP.NET we can use the Sort() method. It will sort ArrayList Elements alphabetically. This will sort the ArrayList elements alphabetically. 🙂
This simple code plays a music…….. [[SimpleAudioEngine sharedEngine] playBackgroundMusic:@”my_music.mp3″]; For stopping the music use this……. [[SimpleAudioEngine sharedEngine]stopBackgroundMusic]; To pause the music use this line of code….. [[SimpleAudioEngine sharedEngine] pauseBackgroundMusic];
Gear joints are one of the real specialities of Box2D. By creating gear joints between two bodies you can actually simulate a real world gear. For creating a gear joint you need two bodies connected by a revolute or prismatic joint. The below code creates two bodies in the shape of a circle which is… Read More »
This code add an image to Jpanel. JPanel panel1 = new JPanel(); JFrame recursion_frame = new JFrame(); BackgroundPanel stack_image1 = new BackgroundPanel(“Recursion.jpg”); panel1.setLayout(null); panel1.setLayout(new BorderLayout()); panel1.setBackground(Color.lightGray); panel1.setVisible(true); recursion_frame.setContentPane(panel1); ///adding to panel… recursion_frame.getContentPane().add(stack_image1); //adding image to panel…
In some case we need to position the window in the center of the screen . The same effect can be achieved by hard coding the center points .But in that case the window position change when the screen resolution changes This code will position the window in center irrespective of different screen resolutions public… Read More »
This is very useful because in some case we want to stop the window from resizing. The resizing can spoil our entire window design public JFrame stack_frame = new JFrame(); stack_frame.setResizable(false);
This is a simple message window which popup after an event . You can put this code inside an clicklistener JOptionPane.showMessageDialog(content_frame.getContentPane() , ” Message String “, JOptionPane.INFORMATION_MESSAGE);
Hi, Objective C uses a special keyword ‘id’. Let’s see what it is. Objective C -id- is actually a ‘pointer to an object’. That is ‘id’ can hold a pointer to any objective c object. It doesn’t matter the object’s class. eg: NSString *myString = @”Coderz Heaven!”; id newString; NSString *tempString; newString=myString; tempString=newString; That’s it!… Read More »
Plist or property list are usually used for storing data in iPhone. They are normal XML files, you can open it in a texteditor to view it’s data. This sample code shows how to read data from the plist. Reading a plist will return an array.You can print out the array to view the results.… Read More »
Hi all …… You know iPhone doesnot have garbage collection like ANDROID. So it becomes the responsibility of the developer or programmer to release the resources and remove the unwanted textures from your memory. If you don’t remove the unused textures and other variables from your memory your application will exit after a while. You… Read More »
For an interactive game building using Box2D, collision detection of Box2D bodies is necessary. There is an easy way to implement collision detection in Box2D. For checking whether two bodies have collided with each other in Box2D while using it with cocos2D, then use the following lines of code where ever you want to check… Read More »
Sometimes unused textures may cause you memory leak! So you need to remove the unused textures. For removing unused textures, use the following line of code, where ever you want to remove unused textures. [[TextureMgr sharedTextureMgr] removeUnusedTextures]; 🙂
Hi, In certain situations you may need to remove all the forces you have applied on different bodies in your box2D world. Then what to do? Removing all the forces from the bodies in the box2D world is simple. Just use the single line of code. yourWorld->ClearForces(); Here yourWorld is your Box2D world. Simple, isn’t… Read More »
The following example shows how to deal with a simple text file in Adobe AIR/FLEX. This example illustratesd how to write a string to a text file and save it in the desktop. However you can use the “application directory” but make sure that you have necessary write permission to access the directory. Please leave… Read More »
Here I will show how to set focus for a textInput in Adobe AIR/FLEX. Look at the following code…….. txt_field.setFocus(); Here “txt_field” is the textInput.
This is a simple code in Titanium which opens the browser in your phone with the specified URL. var URL = “http://www.google.com”; Titanium.Platform.openURL(URL); Please leave your comments on this post.