Jump Start CoffeeScript by Ricardo Tomasi

By Ricardo Tomasi

A useful and concise creation to CoffeeScript, a programming language that compiles into JavaScript and that makes operating with JavaScript more straightforward. The e-book lays out the fundamentals of the language, its syntax, and the fascinating good points that set it except JavaScript. it may fulfill somebody with an intermediate point of figuring out of JavaScript who wishes a conceptual and useful creation to CoffeeScript.

The booklet is predicated round a pragmatic undertaking, top you thru the construction of an easy HTML-based second online game, and explaining the language's philosophy, syntax, and lines step by step alongside the way in which. You'll be capable to see effects on-screen from the very starting, beginning with an easy JavaScript drawing functionality remodeled into CoffeeScript. The game's code relies on good- understood rules and previous paintings, utilizing universal, basic programming styles which are effortless to know whereas additionally demonstrating CoffeeScript's expressiveness.

it is a enjoyable and fast paced booklet that rewards you for every accomplished step with attention-grabbing video game beneficial properties. you'll end the ebook with the experience of feat that comes from construction whatever enjoyable, in addition to having won a superior figuring out of CoffeeScript and an curiosity in exploring its extra complicated features.

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Extra resources for Jump Start CoffeeScript

Example text

Function Gotchas There are a couple of gotchas when writing functions that you should be aware of, especially when starting out. The first is because of the optional parentheses: strategy () -> # do something strategy() -> # do something Despite having only a one-space difference, these two declarations perform very different operations. The first calls the strategy function with one parameter, that being the anonymous function. The second calls strategy with zero parameters, and applies the anonymous function to the result of strategy (the result would itself have to be a function for this code to work).

24×24 and 32×32 are still very common for pixel-art games, though. We’ve created some tiles—the ground block and a ladder—as well as some character images. On-screen character images in 2D video games are called sprites. When we push all our art together in a fixed-size grid, as we have done, we call it a sprite sheet. In our game, we draw the correct subsection of the sprite sheet to the screen for each tile and character. It’s a very handy way to keep all our assets together, as well as reduce our game’s loading time.

M. and still no sign of any team members. Your questions about graphic concepts and plot suggestions remain unanswered in your outbox, and you’re bored with waiting. Lacking real direction on where the game is headed, we might have to set our own goals for the day. First up, we need to learn enough CoffeeScript to be able to code anything. There may be a cleaner and more efficient way to code our solutions, but we want to be able to solve any problem that comes our way. If we’re successful, we can feel more comfortable about finishing our game in time (and we can convince our manager to let us use CoffeeScript for the mega-corporate client project they just won).

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