Analysis of Ruby relay and message-related knowledge, analysis of ruby
Inheritance allows you to create a class as the refinement and specialization of another class ). For example, in our automatic karaoke system, the concept of "Song" is encapsulated in the Song category. Then, as the market grows, we need to provide karaoke support. A karaoke song is no different from other songs (it just does not have a
Application instance analysis of appearance mode in Ruby Design Mode Programming, and ruby Design Mode
What is the appearance mode?
The appearance mode provides unified interfaces for a group of different interfaces in the subsystem. The upper-layer interfaces are defined. by reducing complexity and hiding the communication and dependency between subsystems, the subsystems are easier to use.
For example, su
Tutorial on the basic usage of Regular Expressions in Ruby programs, ruby Regular Expressions
Most of Ruby's built-in types are similar to other programming languages. Mainly include strings, integers, floats, and arrays. However, only script languages such as Ruby, Perl, and awk provide support for built-in expression types. Although the regular expression is re
Explain in detail the condition judgment statements in Ruby and explain the ruby judgment statements
Ruby provides conditional structures, which are common in modern programming languages. Here, we will explain all the Ruby conditional statements and modifiers.Ruby if... else statement:Syntax:
if conditional [then] co
Ruby syntax notes, ruby syntax
Accept user input
first_name = gets.chomp
Uppercase letters
first_name.capitalize!
Uppercase letters
first_name.upcase!
Lower letters
first_name.downcase!
Multi-row output
Print
Note
# I am a comment
Variable acquisition
#{first_name}
Variable
Global variable $
Class variable @@
Method variable @
Local variables are lowercase letters or _
If/else
if a
Class
class
Basic instructions for using regular expressions in Ruby, ruby Regular Expressions
Built-in support for regular expressions is usually limited to scripting languages such as Ruby, Perl, and awk. This is a shame: although regular expressions are mysterious, they are a powerful text processing tool. It is quite different to support it through built-in instead of li
A summary of variable learning in Ruby and a summary of Ruby variable learning
Variables in Ruby are in several forms, including local variables, instance variables, class variables, and global variables. For Beginners, they are often easy to mix up, especially java-like, it is still a headache to understand. After careful identification and learning, we will sum
Ruby string and array maximization problems, ruby Problems
Max Method
b=[1,3,55,777,2,4,6,8,0]
For numeric data, max obtains the maximum value of the array, and min obtains the minimum value of the array.
b.max => 777b.min => 0
It has no practical significance for comparing the size of string arrays,The example in ruby is
# enum.max -> obj# enum.max { |a,
Ruby uses the proxy mode and decoration mode code instance in the design mode, and the ruby Design Mode
Proxy Mode
Requirements:
James asked Xiao Li to chase Xiao Li for him (send dolls, flowers, and chocolate)
No proxy code:
#-*-Encoding: UTF-8-*-# suer class Pursuit attr_accessor: mm def initialize (mm) @ mm = mm end def give_dolls puts "# {mm. name} Show you the doll "end def give_flowers puts" # {mm. na
Detailed description of matching and replacement operations on strings by regular expressions in Ruby, and ruby Regular Expressions
Regular Expression matching
Speaking of Ruby, of course, we need to mention its regular expression mechanism. As a powerful matching language, regular expressions are increasingly used in different fields, from string verification, m
Three methods for executing periodic tasks (scheduled tasks) IN ruby: ruby periodic
1. Preface
Whether using ruby for system management or using rails for web development, periodic tasks may occur. They are scheduled to take a certain period of time (1 hour, 2 days ......) continuously triggered. In ruby, I think it is
Ruby vs Python advantages and disadvantages, ruby vs python
Ruby and Python are too similar, and most of the trade-offs are personal preferences. For example, I think Python's "There is only one way to do it. "than Ruby's" There are always ways to do it. "Well, it's not just about team collaboration. More importantly, you can quickly understand what code you wrot
Ruby 7-day entry (2 functions, arrays and classes), ruby 7-dayDAY 2
Continue the next day. Today we will focus on the basic elements of functions, collections, classes, and other programming.2.1 simple definition of function 2.1.1
def tell_me puts true end
Defining a simple function (No parameter and no return value) is simple. Use def end to wrap the function body.
2.1.2 Parameters
def tell_me(a)puts ae
Introduction: Ruby on Rails is just one aspect of making Ruby very powerful, just as EJB is part of the Java Enterprise platform. Andrew Glover reveals what Java developers can do with Ruby.
Before I begin this article, I need to clarify a few things. First, it's not an article about Ruby on Rails. If you want to lear
This section describes the regular expressions and Ruby Regular Expressions in ruby.
A regular expression is a character of a special sequence. It matches or searches for other strings or string sets by using a pattern with special syntax.Syntax
A regular expression is literally a pattern between a slash or any separator following % r, as shown below:
/Pattern // pattern/im # You can specify the option % r!
Interpreting the usage of annotations in Ruby and interpreting ruby annotations
The Code Annotated In the Ruby line is ignored at runtime. Single line comment # starts with the characters. They start from # To the end of the line as follows:
#! /Usr/bin/ruby-w # This is a single line comment. puts "Hello,
A simple tutorial on JSON Processing Using Ruby, and a json tutorial on ruby Processing
Environment Configuration
Before using Ruby to encode or decode JSON data, we need to install the Ruby JSON module. Before installing this module, you must first install Ruby gem. We will
Recommended syntax style in Ruby programming, and ruby programming syntax Style
Use: Reference constants (including classes and modules) and constructors (such as Array () or Nokogiri: HTML ()).Never use: to call methods.
# bad SomeClass::some_method some_object::some_method # good SomeClass.some_method some_object.some_method SomeModule::SomeClass::SOME_CONST SomeModule::SomeClass()
Enclose def pa
Ruby is a powerful object-oriented scripting language that allows you to easily and quickly perform object-oriented programming. sometimes using formal object-oriented languages such as Smalltalk, Eiffel, and C ++ to develop small projects seems a little complicated. Ruby can meet these object-oriented programming needs. of course, you can also use Ruby for gener
Example of how to optimize Ruby code to speed up the program running, ruby speed
This article mainly introduces how to increase ruby gem contracts. ruby speed by 10 times.
Contracts. ruby is used in my project to add code contracts to Ru
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