Mark's first (surprisingly not his last!) book, Distributed Programming with Ruby, was published . CoffeeScript can be used in any programming environment. Developer's Library books are designed to provide practicing programmers with unique, high-quality references and tutorials on the programming languages. Live and work in Taipei, Taiwan. Serving in my own little tiny company. Flash / AS3 / Ruby / Rails / Python programming for living. Mac OS user, Objective-C for .
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So to install Node. Follow any additional instructions that appear if you need to alter PATHs or anything like that. Then type npm install -g coffee-script to install it globally. On Windows Visit Node.
Go through the install process. Command Line Usage The coffee compiler can be used in several ways. Run and Compile The following command will compile all your. Note the ordering is output then compile. This could change in later versions.
Joining Files You can also compile all your.
This will reduce the number of HTTP request a browser has to make and improve performance. REPL If you type coffee without any options an interactive shell opens. This is similar to irb in Ruby. This is a great tool for things out in the console and performing quick experiments. For installation instructions go here. You can install this via the Sublime Package Control , if you have that already. The Good Stuff a. Simply name your variable, an equals sign, and then the value.
The latter type of string interpolation only works when you use double quotes.
Single quote strings are literal strings. This mirrors behavior. Multi-lined functions are writen on multiple lines with each line after the declaration having some white space before it. Optionally, you can remove the trailing comma from each line. CoffeeScript allows you to do it in a variety of ways to suit your needs.
Then set up your text editor to support CoffeeScript, you can find several on the CoffeeScript wiki. For example to use the TextMate bundle with the cross-platform Sublime Text 2 editor , unpack the bundle in a CoffeeScript directory under Packages.
This setup gives you syntax highlighting, code snippets, and code completion. You can add a build file to get execution of CoffeeScript with the press of a button. Name the file CoffeeScript. Read the usage section for more information on the CoffeeScript compiler.
You can run samples with coffee filename. Complete by chapter source code files are in the src directory. A copy of all files are in src-no-solutions, these files have stops where you can insert your own solutions. To get the most out of the book: Start your text editor and in src-no-solutions open the source code file for the chapter you are reading. If you have a wide-screen display then arrange your windows so the book is on one side and the text editor on the other.
Then you can read and run the samples, see the results, experiment with the code and solve the exercises. If you make copies of the files you work on then you can easily undo experiments.
If you get stuck with an exercise then copy my solution from the file in the src directory and study it a bit before moving on.
Note that in some of the source files you have to indent your solutions to match the surrounding code. Language Introduction When personal computers were first introduced, most of them came equipped with a simple programming language, usually a variant of BASIC.
Interacting with the computer was closely integrated with this language, and thus every computer-user, whether he wanted to or not, would get a taste of it. Now that computers have become plentiful and cheap, typical users do not get much further than clicking things with a mouse.
For most people, this works very well. But for those of us with a natural inclination towards technological tinkering, the removal of programming from every-day computer use presents something of a barrier.
Confucius Besides explaining CoffeeScript, this book tries to be an introduction to the basic principles of programming. Programming, it turns out, is hard. The fundamental rules are, most of the time, simple and clear.
But programs, while built on top of these basic rules, tend to become complex enough to introduce their own rules, their own complexity. Because of this, programming is rarely simple or predictable. As Donald Knuth, who is something of a founding father of the field, says, it is an art.
To get something out of this book, more than just passive reading is required. Try to stay sharp, make an effort to solve the exercises, and only continue on when you are reasonably sure you understand the material that came before. Universes of virtually unlimited complexity can be created in the form of computer programs.
Analogies that try to compare programs to objects we are familiar with tend to fall short, but a superficially fitting one is that of a machine. The gears of a mechanical watch fit together ingeniously, and if the watchmaker was any good, it will accurately show the time for many years. The elements of a program fit together in a similar way, and if the programmer knows what he is doing, the program will run without crashing.
A computer is a machine built to act as a host for these immaterial machines. Computers themselves can only do stupidly straightforward things. The reason they are so useful is that they do these things at an incredibly high speed.
A program can, by ingeniously combining many of these simple actions, do very complicated things. To some of us, writing computer programs is a fascinating game. A program is a building of thought. It is costless to build, weightless, growing easily under our typing hands.
If we get carried away, its size and complexity will grow out of control, confusing even the one who created it. This is the main problem of programming.
When a program works, it is beautiful. The art of programming is the skill of controlling complexity. The great program is subdued, made simple in its complexity. They have composed strict rules about the form programs should have, and the more zealous among them will denounce those who break these rules as bad programmers.