By Trevor Burnham
ISBN-10: 1934356786
ISBN-13: 9781934356784
For 15 years, dynamic web pages has been written in one language: JavaScript. Now, for the 1st time, programmers have another that does not upload an additional layer of abstraction or require plugins. CoffeeScript offers all of JavaScript's performance wrapped in a cleanser, extra succinct syntax that encourages use of "the solid components" of the language.CoffeeScript: speeded up JavaScript Development is geared toward programmers who are looking to get a grip in this new language whereas enhancing their realizing of JavaScript. you will know about time-saving beneficial properties like record comprehensions and splats, arrange your code into modules with extensible sessions, and get your toes rainy with jQuery by way of development a fast paced be aware game.The publication additionally introduces Node.js, the key server-side JavaScript setting. Node and CoffeeScript turn into a good fit, permitting you to boost the back and front ends of an internet program within the comparable language. With CoffeeScript on your toolkit, you could write nice code wherever.
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Additional info for CoffeeScript: Accelerated JavaScript Development (Pragmatic)
Sample text
You can still use return explicitly, but it’s optional, and the preferred style is to omit it unless you’re breaking the flow of execution. If you don’t want to return anything, use return by itself. So far, our function has been anonymous. log hi() Once again, we get this response: Hello, functions! Naming a function in CoffeeScript just means assigning it to a variable. Note that we could have written do hi instead of hi(). But in practice, do is usually only used to create scope, especially during iteration.
Profile: export PATH=/usr/local/bin:$PATH Make sure to include the :$PATH part—otherwise, /usr/local/bin would replace your PATH rather than being added to it! For the line to take effect, you’ll have to save the file and start a new shell session (for example, by opening a new Terminal window and closing the old one). If you’re using a different OS or shell, these steps might be slightly different; enter echo $SHELL to find out which shell you’re using. Don’t forget that you have to restart your shell session after modifying the file in order for it to take effect.
A function’s scope is nested within the scope that the function itself lives in. ) This is another important thing to understand about scope: it doesn’t depend on where or how the function is being called. log "Take one down, pass it around" count-- singBottleCount true; singBottleCount false singDecrement(); singBottleCount true if count isnt 0 then singCountdown count This example yields the following (omitting everything but the functions that create scope and the vars that inhabit them): var singCountdown; singCountdown = function(count) { var singBottleCount, singDecrement; singBottleCount = function(specifyLocation) { var bottleStr, locationStr; // ...
CoffeeScript: Accelerated JavaScript Development (Pragmatic) by Trevor Burnham
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