Ruby Stduy

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swan lin

Items:18 | Visits:69

Category:Schools & Education | Tags:ruby, study

Created:on 2007-09-25 | Updated:on 2008-03-15

start to study ruby

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Lesson Cover :rubylearning.com :: View topic - Important: Read This First

Tags: learn, ruby on 2007-10-22 -All Annotations (0) -About

more fromrubylearning.com
- Objective:
  
  To get you up-to-speed in Core Ruby programming. Learning and asking questions as a group 'jump-starts' the Ruby learning process.
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Variables and Assignments: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- Keywords can't be used as variable names. def is a keyword
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Fun with Strings: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- does not have anything in it at all; we call that an empty string.
- puts 'It\'s my Ruby'
- n Ruby, strings are mutable. They can expand as needed, without using much time and memory. Ruby stores a string as a sequence of bytes.
- The command output string is sent to the operating system as a command to be executed
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Numbers in Ruby: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- Ruby integers are objects of class Fixnum or Bignum. The Fixnum and Bignum classes represent integers of differing sizes. Both classes descend from Integer (and therefore Numeric). The floating-point numbers are objects of class Float, corresponding to the native architecture's double data type.
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Ruby Features: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 and saved by2 people -All Annotations (0) -About

more fromrubylearning.com
- Free format
- Case sensitive
- Comments - Anything following an unquoted #, to the end of the line on which it appears, is ignored by the interpreter. Also, to facilitate large comment blocks, the ruby interpreter also ignores anything between a line starting with =begin and another line starting with =end
- Statement delimiters
- But in Ruby, all of these are true; in fact, everything is true except the reserved words false and nil.
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First Ruby Program: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- Press the F8 key to open an output window
- Ctrl+Shift+I - this opens the Indentation Settings window
- All Ruby source files have the .rb file extension
- Foo class has name foo.rb
- puts (s in puts stands for string; puts really means put string)
- g)
  > simply writes onto the screen whatever comes after it,
- simply writes onto the screen whatever comes after it
- a. Parentheses are usually optional with a method call. These calls are all valid:
  foobar
  foobar()
  foobar(a, b, c)
  foobar a, b, c
- everything from an integer to a string is considered to be an object
- To use a method, you need to put a dot after the object, and then append the method name.
- Some methods such as puts and gets are available everywhere and don't need to be associated with a specific object.
- provided by Ruby's Kernel module
- When you run a Ruby application, an object called main of class Object is automatically created. This object provides access to the Kernel methods.
- I am using single quotes around Hello. ' is more efficient than "
- String literals are sequences of characters between single or double quotation marks
- Ruby is an interpreted language
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LinuxDevCenter.com -- An Interview with the Creator of Ruby

Tags: learn, ruby on 2007-10-23 and saved by2 people -All Annotations (0) -About

more fromwww.linuxdevcenter.com
- Ruby has been described as an absolutely pure object-oriented scripting language and a genuine attempt to combine the best of everything in the scripting world.
- Yukihiro Matsumoto (or "Matz" as he's known online) is the creator of Ruby
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Ruby Installation: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- Yukihiro Matsumoto, commonly known as 'Matz' created the Ruby language in 1993
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Ruby Introduction: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 and saved by2 people -All Annotations (0) -About

more fromrubylearning.com
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rubylearning.com :: View topic - Lesson 1

Tags: learn, ruby on 2007-10-23 and saved by2 people -All Annotations (0) -About

more fromwww.rubylearning.com
- We shall be referring to the documentation here - http://www.ruby-doc.org/core/
- Constants begin with capital letters. Example PI, Length
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RubyLearning Chatroom (at Lingr) > Archives > Recent messages

Tags: learn, ruby on 2007-10-22 -All Annotations (0) -About

more fromwww.lingr.com
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Ruby Mentor, Guide: Ruby Study Notes - Best Ruby Guide, Ruby Tutorial

Tags: learn, ruby on 2007-10-23 -All Annotations (0) -About

more fromrubylearning.com
- It is my observation that if one learns a programming language along with a group and with set targets every day; one learns faster.
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Ruby Study Notes - Best Ruby Tutorial for Learning Ruby

Tags: learn, ruby on 2007-10-23 and saved by17 people -All Annotations (0) -About

more fromrubylearning.com
- RubyLearning.com is a thorough collection of Ruby Study Notes for those who are new to the Ruby programming language and in search of a solid introduction to Ruby's concepts and constructs - ruby-lang.org.
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Ruby From Other Languages

Tags: ruby, selenium on 2007-09-24 and saved by2 people -All Annotations (0) -About

more fromwww.ruby-lang.org
- an identifier starts with a capital letter,
  it is a constant
- starts with @, it is an instance variable
- starts with a dollar sign ($), it is a global variable
- starts with @@,
  it is a class variable.
- start with capital letters
- Method names
- Ruby doesn’t have keyword parameters,
- In Ruby, everything except nil and false is considered true.
- Singleton methods are per-object methods. They are only available on the
  Object you defined it on.
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Ruby in Twenty Minutes

Tags: ruby, selenium on 2007-09-24 and saved by2 people -All Annotations (0) -About

more fromwww.ruby-lang.org
- In Ruby, anything on a line after a hash mark is a
  comment and is ignored by the interpreter
- __FILE__ is the magic variable that contains the name of the current
  file.
- $0 is the name of the file used to start the program.
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Ruby in Twenty Minutes

Tags: ruby, selenium on 2007-09-24 and saved by2 people -All Annotations (0) -About

more fromwww.ruby-lang.org
- Ruby uses the good object-oriented approach of keeping data sort-of
  hidden away.
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Ruby in Twenty Minutes

Tags: ruby, selenium on 2007-09-24 -All Annotations (0) -About

more fromwww.ruby-lang.org
- Ruby’s response => nil tells
  us that it knows we’re done defining the method
- h to take a name as a parameter.
- saying is “If the name isn’t
  supplied, use the default name of "World"”.
- @name.
  This is an instance variable, and is available to all the methods of
  the class
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Ruby in Twenty Minutes

Tags: ruby, selenium on 2007-09-24 and saved by7 people -All Annotations (0) -About

more fromwww.ruby-lang.org
- puts always
  returns nil, which is Ruby’s absolutely-positively-nothing value.
- puts is the basic command to print something out in Ruby.
- In Ruby ** is the way you say “to the power of”
- floating-point number.

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