By Paolo Perrotta
Everyone within the Ruby international seems conversing approximately metaprogramming--how you should use it to take away duplication on your code and write based, appealing courses. you can now get in at the motion as well.
This booklet describes metaprogramming as an integral part of Ruby. when you comprehend the foundations of Ruby, together with the article version, scopes, and eigenclasses, you're in your solution to utilizing metaprogramming either on your day-by-day paintings and on your enjoyable, after-hours projects.
studying metaprogramming doesn't need to be tricky or uninteresting. via taking you on a Monday-through-Friday workweek experience with a couple of programmers, Paolo Perrotta is helping make getting to know the paintings of metaprogramming either elementary and entertaining.
The publication is packed with:
Pragmatic examples of metaprogramming in motion, lots of which come immediately from renowned libraries or frameworks, reminiscent of Rails. Programming demanding situations that allow you to test and play with one of the most enjoyable, "out-there" metaprogramming strategies. * Metaprogramming spells--34 useful recipes and idioms for you to research and observe immediately, to put in writing code that's absolute to impress.
no matter if you're a Ruby apprentice at the route to getting to know the language or a Ruby wiz looking for new advice, this ebook is for you.
Read Online or Download Metaprogramming Ruby: Program Like the Ruby Pros PDF
Best programming books
Building allotted purposes is tough adequate with no need to coordinate the activities that lead them to paintings. This sensible consultant exhibits how Apache ZooKeeper is helping you deal with disbursed structures, so that you can concentration almost always on software good judgment. despite ZooKeeper, imposing coordination projects isn't really trivial, yet this e-book presents solid practices to offer you a head begin, and issues out caveats that builders and directors alike have to look ahead to alongside the way.
In 3 separate sections, ZooKeeper participants Flavio Junqueira and Benjamin Reed introduce the rules of allotted structures, offer ZooKeeper programming options, and contain the data you want to administer this service.
• find out how ZooKeeper solves universal coordination initiatives
• discover the ZooKeeper API’s Java and C implementations and the way they fluctuate
• Use how you can song and react to ZooKeeper kingdom adjustments
• deal with disasters of the community, software strategies, and ZooKeeper itself
• know about ZooKeeper’s trickier facets facing concurrency, ordering, and configuration
• Use the Curator high-level interface for connection administration
• get to grips with ZooKeeper internals and management instruments
The largest problem dealing with many video game programmers is finishing their video game. so much video game tasks fizzle out, crushed through the complexity in their personal code. online game Programming styles tackles that specific challenge. according to years of expertise in shipped AAA titles, this e-book collects confirmed styles to untangle and optimize your online game, prepared as self sufficient recipes so that you can decide simply the styles you would like.
XML is the Extensible Markup Language. it really is designed to enhance the performance of the net via supplying extra versatile and adaptable details id. XML Made easy presents a quick creation to XML for the individual that favours domestic research and self instructing and doesn't have pricey computing amenities to benefit on.
Additional resources for Metaprogramming Ruby: Program Like the Ruby Pros
If you’re curious, you’ll have to find it yourself, maybe with some help from your friend irb. It’s almost time to go home after an exhausting, but very satisfying, day of work. But before you call it a day, Bill does a complete wrap-up of what you learned. 7 Object Model Wrap-Up Here’s a checklist of what you learned today: • An object is composed of a bunch of instance variables and a link to a class. • The methods of an object live in the object’s class (from the point of view of the class, they’re called instance methods).
At the second mention, class D already exists, so Ruby doesn’t need to define it. Instead, it just reopens the existing class and defines a method named y( ) there. In a sense, the class keyword in Ruby is more like a scope operator than a class declaration. Yes, it does create classes that don’t yet exist, but you might argue that it does this as a side effect. For class, the core 30 O PEN C LASSES job is to move you in the context of the class, where you can define methods. You might think that Bill is just nitpicking here, but this distinction about the class keyword is not an academic detail.
7: Method lookup with modules an object, you can call the Kernel methods from anywhere. This gives you the illusion that print is a language keyword, when it’s actually a method. 13 You can take advantage of this mechanism yourself: if you add a method to Kernel, this Kernel Method will be available to all objects. To prove this is actually useful, Bill shows you an example from one of Ruby’s most popular libraries. 13. If you’re not convinced that you’re always inside an object, wait for the sidebar on page 54.