Programming Preliminaries[ edit ] Anybody can write a program. A background in mathematics or science is not required. Patience, practice, and an interest in the subject matter should suffice, along with the required software and hardware.
Install Go see the Installation Instructions. Later, as we implement additional functionality, we will add more packages to this import declaration.
Data Structures Let's start by defining the data structures. A wiki consists of a series of interconnected pages, each of which has a title and a body the page content. Here, we define Page as a struct with two fields representing the title and body.
The Body element is a byte rather than string because that is the type expected by the io libraries we will use, as you'll see below. The Page struct describes how page data will be stored in memory.
But what about persistent storage? We can address that by creating a save method on Page: It takes no parameters, and returns a value of type error. For simplicity, we will use the Title as the file name. The save method returns an error value because that is the return type of WriteFile a standard library function that writes a byte slice to a file.
The save method returns the error value, to let the application handle it should anything go wrong while writing the file. If all goes well, Page. The octal integer literalpassed as the third parameter to WriteFile, indicates that the file should be created with read-write permissions for the current user only.
See the Unix man page open 2 for details. In addition to saving pages, we will want to load pages, too: Functions can return multiple values. The standard library function io.
ReadFile returns byte and error. But what happens if ReadFile encounters an error? For example, the file might not exist. We should not ignore such errors. ReadFile filename if err! If not, it will be an error that can be handled by the caller see the language specification for details. At this point we have a simple data structure and the ability to save to and load from a file.
Let's write a main function to test what we've written: The file would then be read into the struct p2, and its Body element printed to the screen. You can compile and run the program like this: If you're using Windows you must type "wiki" without the ".
It then calls http. ListenAndServe, specifying that it should listen on port on any interface ": Don't worry about its second parameter, nil, for now.
One of the things that have always fascinated me in programming is coding a game. I believe that many programmers take up C++ in order to create their first game. The following topics introduce and discuss the essential components of Visual Basic, an object-oriented programming language. After creating the user interface for your application using forms and controls, you need to write the code that defines the application's behavior. As with any modern. The topics are for people who are already familiar with the basic language and would like to pursue basics further. It shows how to use efficiency in programming and a few different techniques. Corliss, William R. Computers.
This function will block until the program is terminated. ListenAndServe always returns an error, since it only returns when an unexpected error occurs. In order to log that error we wrap the function call with log.
The function handler is of the type http. It takes an http. ResponseWriter and an http. Request as its arguments.BASIC is considered an excellent starting point for moving onto other languages, and can be useful for simple programs.
Programming Languages [ edit ] Programming languages allow people to give instructions to a computer with commands that both the computer and the programmer can understand. The BASIC programming language was designed by John Kemeny and Thomas Kurtz in Kemeny and Kurtz designed a simple language for the sake of the users, computers couldn’t handle Logo, but it was possible to write a BASIC interpreter that would ﬁt them.
As a result, BASIC became the near-universal language for amateur.
Note. This documentation uses lambda expressions to define delegates in PLINQ. If you are not familiar with lambda expressions in C# or Visual Basic, see Lambda Expressions in PLINQ and TPL. Kemeny, John G., and Kurtz, Thomas E.
Basic Programming. New York: John Wiley and Sons, Inc. Excellent introductory book to basic programming language. It explains what a computer is and how it is used.
Marateck, Samuel L. BASIC. New York: Academic Press, Inc. Excellent book for people not familiar with the basic language. Fifty Years of BASIC, the Programming Language That Made Computers Personal. W - A simple programming language Details Created: 20 February OK, so maybe I could find a BASIC compiler somewhere if I really looked hard, but who the devil wants to write programs in BASIC anyway?
No, I was looking for something much more simple and efficient.