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To use refactoring effectively, it is important to know just when to refactor You don't always need to refactor working code There are some guidelines for deciding when to refactor First, when you are going to add some functionality to a program, you should be prepared to refactor As we've noted before, one important benefit of object-oriented program design is that the code is easier to maintain and modify So, when it comes time to add new functionality to a program, it is important that code be as welldesigned as it can be And this is precisely the goal of refactoring Refactoring should be applied to the code until its design has improved enough to make it easy to modify Then, after the refactoring, new functionality will be uch easier to add Refactoring is also useful when you need to find bugs Part of finding a bug means understanding a program The fact that a program has bugs often means that the code isn't clear enough to spot them in the first place Refactoring while you are going over code to hunt for bugs will improve the quality of the code and even reduce the number of bugs One important part of almost every project is the code review For code reviews with just two or three programmers (probably the most productive kind), refactorings can be suggested and applied as the group goes over the code and gets better understanding of its design.

Create RM4SCC barcodes as graphic images and save to local files; Thermal printer support . 1. Download KA.Barcode Generator for .NET Suite trial version and .Related: Printing Barcode Crystal C# , RDLC Barcode Generation , Create Barcode RDLC Library

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Duplicate Code - duplicate code means you need to extract some methods Long Method - too long is hard to understand, extract methods Large Class - a class that does too much needs to be split Long Parameter List - makes it hard to read, consider passing objects Divergent Change - code degradation as a result of too many chaotic changes to a class Shotgun Surgery - too many undisciplined changes to classes and attributes Feature Envy - one class is interested in too many details of another class Data Clumps - data that is used together everywhere should be in a class of its own Primitive Obsession - a program can use too many primitive data types that should really be part of a class Switch Statements - switch statements can mean you are not using polymorphism effectively Parallel Inheritance Hierarchies - repeating class definitions in parallel classes is more duplication to eliminate Lazy Class - a class should do nough to pay its own way or be eliminated Speculative Generality - designing for future flexibility before it.

image formats like png, jpeg, gif, tiff, bmp. . Follow the sample code below to transform stream to mage and print an EAN-13+5 bar code. using KeepAutomation.Barcode.Bean; BarCode ean13= new BarCode .Related: Printing Barcode .NET Winforms , Create Barcode Word how to, Print Barcode Crystal C#

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Draw, print matrix QR Code barcode as graphic image without using barcode font; Accurate 2D . 1. Copy folder "barcode" in your download the trial package to .Related: Excel Barcode Generating , Print Barcode SSRS , Barcode Printing Crystal VB.NET

Drag-and-drop functionality on the Web is becoming ncreasingly more popular. It adds a level of deeper interactivity by allowing users to move elements around on the screen in a 3D fashion. Figure 4-10 shows the Yahoo! Sports Fantasy Baseball interface featuring a slick drag-and-drop interface. The native JavaScript API offers the onMousedown and onMouseup events, which can be added inline to any element to capture these events. The main difference between events in JavaScript and jQuery is the addition of the on keyword that proceeds events in JavaScript. In jQuery, this extra keyword is dropped. The onMousedown and onMouseup are just known as mousedown and mouseup in jQuery. 128 size in visual basic.net. <div class= add-to . Java bar code creation on java using barcode encoder for java .Related: Print Codabar .NET , .NET ITF-14 Generator , Interleaved 2 of 5 Generator .NET

private void OpenFileMenu_Click(object sender, SystemEventArgs e) { // Create OpenFileDialog OpenFileDialog opnDlg = new OpenFileDialog(); // Set a filter for images opnDlgFilter = "All Image files|* bmp;*gif;*jpg;*ico;"+ "*emf;,*wmfBitmap Files(*bmp;*gif;*jpg;"+ "*ico)|*bmp;*gif;*jpg;*ico|"+ "Meta Files(*emf;*wmf;*png)|*emf;*.*bmp;*gif;* jpg;*ico . Draw EAN / UCC - 13 In .NET Framework Using Barcode drawer for .Related: Print Barcode Excel , Crystal Barcode Generation SDK, .NET Winforms Barcode Generator how to

The GDI+ class library also provides classes that extend design-time user nterface (UI) logic and drawing functionality These classes are defined in the SystemDrawingDesign namespace Examples of extended UI functionality include creating custom toolbox items, type-specific value editors, and type converters. Code 128 Code Set B Encoder In Visual Studio .NET Using Barcode creator for ASP .Related: EAN-8 Generation .NET , .NET UPC-E Generation , ISBN Generating .NET

Installation of EAN-13 Barcode Maker Control into ASP.NET Projects. 1. Download KA.Barcode for ASP.NET trial version and unzip. 2. Add reference: Add .Related: Barcode Generating Word how to, Create Barcode SSRS , Excel Barcode Generator SDK

Paint QR-Code In .NET Framework Using Barcode encoder for ASP . QR Code Creator In Visual Studio .NET Using Barcode printer for .It is common to have functionality that could be used in more than one place One way to provide reusable functionality is to put it into a class and then llow other classes to inherit it by extending that classThe problem with this approach in a single-inheritance language like Java is that a class can be derived only from one other class If you need to write a Java class that incorporates functionality from more than one other class, you can t.Related: .NET Intelligent Mail Generating

Figure 9-13 shows two other views of the same page that transform its look. n Figure 9-13, the figure on the left shows the text scattered all over the page, while the figure on the right, a mobile device, shows the image just fine, but the text is just one word wide, snaking along the side of the picture. The rest is below the view area. Draw Data Matrix In Visual Basic .NET Using Barcode maker for .NET Control to .Related: Generate Barcode ASP.NET VB , Printing Barcode VB.NET Winforms , Create Barcode ASP.NET Library

When the super statement is used inside of a class method other han the constructor, the dot syntax accesses the superclass method, and the correct number and type of arguments are required. Listing 4.5 shows how to use the super statement in both a constructor and a method. Notice how Listing 4.5 uses superclass A s methods and also adds functionality to them. As you can imagine, this flexibility allows for many ways to utilize a superclass while adding specific functionality to a subclass. asp.net webform ansi/aim code 128 encoder toattach code-128c on .net. UCC - 12 barcode library with .Related: 

Install EAN-8 Barcode Maker Component in ASP.NET Projects. . 1. Copy folder "barcode" in your download the trial package to your IIS web application folder. .Related: Barcode Generator SSRS how to, Print Barcode ASP.NET Library, Create Barcode RDLC VB.NET

Imaging involves viewing and manipulating images In managed GDI+, imaging functionality is divided into two categories: basic and advanced The basic functionality is defined in the Image class, which also serves as the base class of the Bitmap and Metafile classes The Image class provides members o load, create, and save images The Bitmap and Metafile classes define functionality for displaying, manipulating, and saving bitmaps and metafiles s 7 and 8 cover. Bar Code Encoder In .NET Using Barcode creation for .Related: 

3 Data Matrix 2d Barcode Encoder In NET Using Barcode generator NET Control to generate, create Data Matrix 2d barcode image in isual Studio NET applications.

Contents Sampling Frequency 41 JPEG Operation 44 Interleaved and Noninterleaved Scans 45 Conclusion 46 5 JPEG File Format Markers 47 Compressed Data 49 Marker Types 49 JFIF Format 55 Conclusion 57 JPEG Human Coding Usage Frequencies 61 Huffman Coding Example 63 Huffman Coding Using Code Lengths 65 Huffman Coding in JPEG 71 Limiting Code Lengths 72 Decoding Huffman Codes 73 Conclusion 75 The Discrete Cosine Transform DCT in ne Dimension 78 DCT in Two Dimensions 84 Basic Matrix Operations 85 Using the 2-D Forward DCT 87 Quantization 88 Zigzag Ordering 89 Conclusion 90 Decoding Sequential-Mode JPEG Images MCU Dimensions 91 Decoding Data Units 94 Decoding Example 97 Processing DCT Coefficients 98 Up-Sampling 99 Restart Marker Processing 99 Overview of JPEG Decoding 100 Conclusion 100 Creating Sequential JPEG Files Compression Parameters 105 Output File Structure 111 Doing the Encoding 111 Down-Sampling 112 Interleaving 113 Data Unit Encoding 115 Huffman Table Generation 117 Conclusion 119. oldroad. Draw GS1 128 In Visual Studio .NET Using .NET framework Control to generate, create barcode image in NET framework applications.Related: Creating QR Code Java , QR Code Creating C# Image, QR Code Creating ASP.NET Image

E in Png, Jpeg/Jpg, Gif, Tiff, Bmp and .NET graphic objects; Support . Installation of UPC-E Barcode Maker into .NET Windows Forms. Download KA.Barcode Generator .Related: Generate Barcode VB.NET Winforms , Generate Barcode Excel , RDLC .NET Winforms Barcode Generator

No Java object exists until it has been created with the Java new operator Because a program has to start by creating new objects, a Java program requires a static component, eg, public static main(String args[]) The main method exists statically, and creates new objects to get the program running Constructors When a Java object is created with the new operator, it begins its lifetime by having its constructor automatically called by the runtime system The constructor is really a special purpose method The constructor has the same name as the class, with no ther type attribute The constructor can be declared to be public, private, or protected The goal of a constructor is to initialize the class It should set all class attributes to a known state It can create other subobjects that are a part of the class When the constructor is done, the newly created object should be ready to use A constructor does not return a value, but it can throw an exception The new operator returns a reference to the newly created object Java allows you to define multiple constructors for a class Each constructor has a different signature determined by the order and type of the constructor's arguments The default constructor has no arguments It is often useful to define several constructors to initialize objects to different values If a class is derived from another class, the constructor of the parent should be called This is done with the Java super() statement Java will automatically call the default constructor of the parent class if you don't explicitly use a super() statement If you want to use a parent constructor other than the default one, you can use super() with an appropriate set of arguments Almost every Java example shown in this book will have constructors that you can study to see the different ways constructors can be used Garbage collection After an object has carried out its purpose, it is often not needed by the program any longer All objects consume at least some system resources, and it is important to free these resources when an object is no longer needed Whenever an object no longer has any references to it, the Java runtime system will consider the object unused, and therefore available for garbage collection Automatic garbage collection is a great simplification for the programmer Unlike in other object-oriented languages such as C++, the Java programmer is not responsible for explicitly freeing resources used by an object The garbage collector handles all this (usually - see the next section, "Memory leaks").

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