By Ian Young

ISBN-10: 1782162666

ISBN-13: 9781782162667

JavaScript is turning into one of many key languages in internet improvement. it's now extra very important than ever throughout a turning out to be record of systems. CoffeeScript places the joys again into JavaScript programming with dependent syntax and robust features.

CoffeeScript software improvement provides you with an in-depth examine the CoffeeScript language, all whereas construction a operating net program. alongside the way in which, you'll see the entire nice positive aspects CoffeeScript has to provide, and the way to use them to accommodate genuine difficulties like sprawling codebases, incomplete facts, and asynchronous internet requests.

Through the process this ebook you'll examine the CoffeeScript syntax and spot it tested with uncomplicated examples. As you cross, you'll positioned your new abilities into perform by means of development an online program, piece by means of piece. You'll begin with common language positive aspects equivalent to loops, features, and string manipulation. Then, we’ll delve into complex positive factors like periods and inheritance. study complicated idioms to house universal occurrences like exterior internet requests, and hone your procedure for improvement initiatives like debugging and refactoring.

CoffeeScript program improvement will educate you not just how you can write CoffeeScript, but additionally find out how to construct reliable functions that run easily and are a excitement to take care of.

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Additional info for CoffeeScript Application Development

Example text

Finally, let's display that list of animals on our page! Our HTML already contains an empty list, so we just need to build some content and insert it into that element.

Remember, we iterated over arrays using for item in array. Objects have a very similar syntax, but use the of keyword instead of in. This can be a little confusing if you think back to the in keyword in JavaScript, so try to put that out of your mind. I remember the difference by thinking of describing it in English: you have items in an array, but you have properties of an object. The loop takes two values, the key and value of the property. log "My " + k + " is " + v The compiled JavaScript is again a very simple implementation, using the in JavaScript keyword (which we're still not thinking too hard about lest we get confused again).

We can also use in for more advanced situations, such as when the array is dynamic. "); } You can see that CoffeeScript has defined a small utility function in this example, named __indexOf. Several of these helper functions will appear over time. They allow CoffeeScript to generate code that is compatible with every JavaScript runtime and doesn't rely on any external libraries. These helpers are kept small and efficient, and luckily CoffeeScript is smart enough to only generate them once per file.

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CoffeeScript Application Development by Ian Young

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