By Michael Fitzgerald
Even if Ruby is a straightforward language to benefit, within the warmth of motion you'll locate that you just can't have in mind the right kind syntax for a conditional or the identify of a mode. this useful pocket reference bargains short but transparent factors of Ruby's middle elements, from operators to reserved phrases to info buildings to strategy syntax, highlighting these key positive factors that you'll most likely use on a daily basis whilst coding Ruby.
no matter if you've come to Ruby as a result Rails internet improvement framework --Ruby's killer app -- or just simply because it's a comparatively fresh, robust and expressive language that's worthwhile for many functions, the Ruby Pocket Reference is geared up that can assist you locate what you wish speedy. This publication not just gets you in control on how Ruby works, it offers you a convenient reference you should use anyplace, anytime.
during this booklet, you discover crucial info on:
* Reserved phrases, operators, reviews, numbers, variables, levels, and symbols
* Predefined variables andglobal constants
* Conditional statements, approach use, periods, and modules (mixins)
* Lists of equipment from the thing, String, Array, and Hash periods and the Kernel module
* sprintf andtime formatting directories
* Interactive Ruby (irb) and the Ruby debugger
* Ruby documentation
you furthermore mght get details at the RubyGems package deal software and Rake, a construct software just like make.. If you're utilizing Ruby day-by-day and simply wish the facts-fast-Ruby Pocket Reference is your booklet.
Read or Download Ruby Pocket Reference PDF
Best programming books
As twenty first century humans, we are living a electronic existence, yet machine scientists all over the world warn of a declining pool of digitally literate laptop technological know-how scholars. The Scratch atmosphere makes it enjoyable for college kids of any age to imagine, create, and collaborate digitally.
Scratch 2. zero Beginner's consultant moment version will educate you the way to turn into a Scratch programmer and lay the root for programming in any machine language. no matter if you're making a birthday card or cloning bricks for a online game of Breakout, initiatives are approached in a step by step strategy to assist you layout, create, and consider every one programming workout.
This booklet constitutes the refereed complaints of the twenty fifth foreign Colloquium on Automata, Languages and Programming, ICALP'98, held in Aalborg, Denmark, in July 1998. The 70 revised complete papers offered including 8 invited contributions have been rigorously chosen from a complete of 182 submissions.
Этот сборник часто задаваемых вопросов по home windows Vista был собран по материалам форума OSzone. web. Он будет полезен как для решения конкретных задачу, так и в ознакомительных целях. Возможно при прочтении данного FAQ вы узнаете что-то новое и полезное, то чем вы сможете воспользоваться в будущем. Здесь я старался собрать вопросы, которые еще не рассматривались ране, вопросы, которые относятся в первую очередь к home windows Vista, хотя фактически львиная доля вопросов, описанных в FAQ по home windows XP применима и к этой системе.
James Kelly’s LEGO MINDSTORMS NXT-G Programming consultant, moment variation is a fountain of knowledge and concepts for these trying to grasp the artwork of programming LEGO’s MINDSTORMS NXT robotics kits. This moment variation is fully-updated to hide the entire most recent positive factors and elements within the NXT 2. zero sequence. it's also workouts on the finish of every bankruptcy and different content material feedback from educators and different readers of the 1st variation.
- .Net Framework (Professional Projects) by Angshuman Chakraborti (2002-04-02)
- Logic Programming: 24th International Conference, ICLP 2008 Udine, Italy, December 9-13 2008 Proceedings
- Objective-C Programming: The Big Nerd Ranch Guide (2nd Edition)
- Beginning Programming with C++ For Dummies
Additional info for Ruby Pocket Reference
Initialize is the first code that is executed after the object is instantiated; you can execute just about any Ruby code in initialize. initialize is always private; that is, it is scoped only to the current object, not beyond it. You access the instance variable @name with the method hello_matz. array_of_ten p ten # => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] Instance Variables As mentioned previously, an instance variable is a variable that is available from within an instance of a class, and is limited in scope because it belongs to a given object.
To test whether a file is closed. lineno}. closed? lineno}, inserts the line number in the output, followed by the line from the file. The open, each, and close methods are all from the IO class, not File. txt" print while gets 48 | Ruby Pocket Reference ARGV (or $*) is an array, and each of its elements is a file- name submitted on the command line, usually. But in this case, we have appended a filename to ARGV directly with <<, an array method. You can apply any method to ARGV that you might apply to any other array.
Horse_name # => Doc Bar Classes | 37 Accessors Ruby simplifies the creation of getters and setters by metaprogramming with the methods attr, attr_reader, attr_ writer, and attr_accessor, all from the Module class. bark # => Woof! By calling attr with :bark and true as arguments, the class Dog will have the instance methods bark and bark=. If you call attr with only the :bark argument, Dog would have only the getter method bark. ) The attr_reader and attr_writer methods accept as arguments the names of one or more instance variables, then create corresponding methods that return (attr_reader) or set (attr_writer) the values of each instance variable.