File handling

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  • File Handling đề cập đến việc đọc và ghi file, đây là một trong những thao tác cơ bản trong các ngôn ngữ lập trình. Phần này sẽ giới thiệu một số phương pháp truy cập file dùng trong C#.

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  • Tạo 1 file handle: AH = 3Ch Input: DS:DX trỏ đến đường dẫn đến file cần mở, là chuỗi ASCIIZ. CX chứa giá trị thuộc tính file. CX = 00: normal = 01: read-only = 02: hidden = 04: system = 10h: tên thư mục con = 20h: archive Output:Nếu CF=0 thì AX = handle của file Nếu CF=1 thì lỗi tạo handle cho file.

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  • Exceptional event Error that occurs during runtime Cause normal program flow to be disrupted Examples Divide by zero errors Accessing the elements of an array beyond its range Invalid input Hard disk crash Opening a nonexistent file Heap memory exhausted

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  • In this chapter, we consider the various aspects of files and the major directory structures. We also discuss the semantics of sharing files among multiple processes, users, and computers. Finally, we discuss ways to handle file protection, necessary when we have multiple users and we want to control who may access files and how files may be accessed.

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  • Mã lỗi ý nghĩa 1000 1 Invalid function number Sai số hiệu hàm 2 File not found Không tìm thấy file 3 Path not found Không tìm thấy đường dẫn 4 Too many open files Mở quá nhiều file 5 File access denied Không truy nhập được file 6 Invalid file handle Số hiệu file không hợp lệ 12 Invalid file access code Mã truy nhập file không hợp lệ 15 Invalid drive number Số hiệu thiết bị không hợp lệ 16 Cannot remove current directory Không thể xoá hoặc chuyển thư mục hiện hành 17 Cannot rename across drives...

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  • This course provides you with the knowledge and skills needed to configure and administer a complex network. The course is designed to provide you with an advanced skill set and abilities to handle more challenging network situations than were presented in the NetWare 5TM Administration course. The NetWare® 5 Advanced Administration course is intended for network administrators who have completed the NetWare 5 Administration course and Networking Technologies course.

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  • The File Handling preferences panel Ask Before Saving Layered TIFF Files Photoshop allows you to save TIFF files containing multiple layers. In fact, you may not realize it, but TIFFs can store anything that native Photoshop PSD files can. With this option enabled (which it is by default), Photoshop alerts you by displaying a warning dialog box every time you save a layered TIFF. This dialog gives you the option to save the file with layers or flatten them (as in a traditional TIFF). If you prefer to work with layered TIFFs rather than PSDs in your workflow, you may want...

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  • Having opened SPSS you will get a dialogue box which you can cancel the first time you enter SPSS. Enlarge the window. SPSS is like a spreadsheet but it does not update calculations, tables or charts if you change the data. At the top of the screen are a series of menus which can be used to instruct SPSS to do something. SPSS uses 2 windows: The Data Editor, which is what you are looking at and which has 2 tabs at the bottom, and the Viewer. The Viewer is not visible yet, but opens automatically as soon as you open a file or run...

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  • Squid proxy server enables you to cache your web content and return it quickly on subsequent requests. System administrators often struggle with delays and too much bandwidth being used, but Squid solves these problems by handling requests locally. By deploying Squid in accelerator mode, requests are handled faster than on normal web servers, thus making your site perform quicker than everyone else's! The Squid Proxy Server 3.1 Beginner's Guide will help you to install and configure Squid so that it is optimized to enhance the performance of your network.

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  • Over the past few weeks, we've taken you on a guided tour of the intricacies of JSP, beginning with basics like conditional statements and loops, and quickly moving on to more complex things like form processing, session management, and error handling. But all good things must come to an end − and so, in this final episode of The JSP Files, we'll be briefly touching on a few other facets of this powerful server−side scripting language.

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  • Microsoft® Visual Basic® Programs to Accompany Programming Logic and Design, Sixth Edition (also known as, VB PAL) is designed to provide students with an opportunity to write Visual Basic programs as part of an Introductory Programming Logic course. It is written to be a companion text to the student’s primary text, Programming Logic and Design, Sixth Edition, by Joyce Farrell.

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  • Dive vào Python là một cuốn sách cho các lập trình Python có kinh nghiệm. Cuốn sách này được cung cấp ở định dạng khác nhau, bao gồm HTML, PDF, đồng bằng văn bản, Microsoft Word và XML. Ngoài ra, Dive vào Python đã được dịch sang nhiều ngôn ngữ, do đó bạn có thể chọn một trong những phù hợp với nhu cầu của bạn

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  • Essential Go code and idioms for all facets of the development process This guide gives you the code “phrases” you need to quickly and effectively complete a wide variety of projects with Go, today’s most exciting new programming language. Tested, easy-to-adapt code examples illuminate every step of Go development, helping you write highly scalable, concurrent software. You’ll master Go-specific idioms for working with strings, collections, arrays, error handling, goroutines, slices, maps, channels, numbers, dates, times, files, networking, web apps, the runtime, and more....

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  • One of the most important parts of running any computer system is handling data on disk. We have already looked at UNIX file handling in Chapter 10. In this chapter, we’ll look at two ways to add another disk to your system, and what you should put on them. In addition, we’ll discuss disk error recovery on page 218.

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  • Part I: Getting to Know ASP.NET and Visual Web Developer Chapter 1: Understanding Microsoft’s Web Technologies Chapter 2: Getting Up and Running Chapter 3: Creating a Useful ASP.NET Site Chapter 4: Managing Data and Other CRUD Chapter 5: Handling User Input and Events

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  • All operating systems provide services for programs they run. Typical services include executing a new program, opening a file, reading a file, allocating a region of memory, getting the current time of day, and so on. The focus of this text is to describe the services provided by various versions of the UNIX operating system. Describing the UNIX System in a strictly linear fashion, without any forward references to terms that haven't been described yet, is nearly impossible (and would probably be boring).

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  • Unlock the secrets of the Terminal and discover how this powerful tool solves problems the Finder can’t handle. With this handy guide, you’ll learn commands for a variety of tasks, such as killing programs that refuse to quit, renaming a large batch of files in seconds, or running jobs in the background while you do other work. Get started with an easy-to-understand overview of the Terminal and its partner, the shell. Then dive into commands neatly arranged into two dozen categories, including directory operations, file comparisons, and network connections.

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  • Not only the aesthetically distasteful plastic litter, but also less conspicuous small plastic pellets and granules are a threat to marine biota. The latter are found in large quantities on beaches (Gregory, 1978, 1989; Shi- ber, 1979, 1982, 1987; Redford et al., 1997), and are the raw material for the manufacture of plastic products that end up in the marine environment through acci- dental spillage during transport and handling, not as litter or waste as other forms of plastics (Gregory, 1978; Shiber, 1979; Redford et al., 1997).

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  • Generally, state charity officials recommend that the donor take responsibility for transfer of title to ensure termination of liability for the vehicle. In most states, this involves filing a form with the state motor vehicle department which states that the vehicle has been donated. Before donating the vehicle, you should remove the license plates, unless state law requires otherwise. This may help you avoid any liability problems after the vehicle is transferred.

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