Ruby

1. Ruby's most powerful web framework Ruby on Rails. So you can install Railsinstaller directly.Address: http://www.railsinstaller.org/en. The installation process is checked by default to add an environment to path.2. Change the gem image to http://

Day 3Learning to enter the third day, today plans to learn modules, collections and Simple file operations.3.1Mixin ModuleObject-oriented languages use inheritance to propagate behavior to similar objects. Specific to the language, C + + uses a

Insert data at sixteen o'clock P.M.. The displayed created time is. I started to set the time zone in application. RB.Config. time_zone = 'beijing'After investigation, change it to config. active_record.default_timezone = 'beijing' to display the

Ruby-inherited syntax class DerivedClass Override Concept Sometimes, we want child classes to inherit from the parent class to do different things from the parent class, so we need to rewrite the method in the Child class. For example, you have a

The ruby language has existed for a long time and has never been popular in China. Many people only know such a language and there are few people. No matter what language has been developing for more than a decade, it must have something unusual. It

Recently I have studied SVN using the HTTP protocol, but most of them are using Apache to integrate SVN on the Internet. I don't want to use Apache + SVN. I finally found many pages on Google, but it is required to install Ruby on Rails first, so we

Cloud foundry is the first open source PAAs in the industry. it supports multiple frameworks, multiple services and multiple cloud providers. bosh was originally created in the context of the cloud foundry project. nevertheless, it is a general tool

This is my presentation in the rails lecture of hosei University. I will introduce Sass by 5 examples.   1, what is sass? We can get into the official site of sass. The official site give the definition of sass. Sass is the most mature, stable,

#! /Usr/bin/ENV rubyclass megagreeter attr_accessor: names # initialize this object def initialize (names = "world ") @ names = names end # Say hi def say_hi if @ names to everyone. nil? Puts "..." elsif @ names. respond_to? ("Each") # @ names is an

A simple tutorial on XML, XSLT, and XPath processing in Ruby, rubyxml+txpath What is XML? XML refers to the eXtensible Markup Language ). Extensible Markup Language, a subset of Standard Generic Markup languages, a markup language used to mark

11 questions about Hash in Ruby and rubyhash Recently I am studying Rails because the java language I learned is the Getting Started language. a little uncomfortable. in particular, Ruby's Hash. however, you will be able to think about it in detail.

A function implemented by PHP to save remote files to a local device, Recently, I encountered a PHP Remote Image local problem. I checked the manual and found that file_get_contents () and file_put_contents () can solve this problem. The idea is

String processing functions1. Return the length of the string str.length => integer   str.include? other_str => true .include? .include? .include? ?h   3. String insertion: str.insert(index, other_str) =>.insert(0, ) .insert(3, )

1. ruby Installation Here, we will install ruby under win, which corresponds to the number of operating system digits on our computer. For example, if my computer is 64-bit, we will download Ruby 2.0.0-p353 (x64. Then the installation process is

Ruby is not very popular, so it is difficult to draw conclusions at present. However, from the perspective of recruitment, there are still a few companies using Ruby. From the perspective of salary, Ruby is quite high compared with others, the main

1. If print does not automatically wrap the line, puts will automatically wrap the line. If one line is not enough to write, you can add "\" to connect.Ruby code Puts 6/2 print 6/1 puts 'Hello world' puts. We are all '\ 'China'Running result: Ruby

Detailed description of case expressions in Ruby and rubycase expressions There are two forms of Ruby case expressions: The first form is similar to a set of continuous if statements: it allows you to list a set of conditions and execute the first

[Comprehensive] Ladder algorithm and ladder Algorithm  Target Today, I heard people say that the ACM team of a school has developed a Rating System, which is similar to the Rating of TopCoder and Codeforces. the intuitive points are more likely to

An asynchronous file download HttpServer instance implemented by ruby, 1. Use ruby eventmachine and em-http-server gem to complete a simple HttpServer that provides the file download function. 2. The FileStreamer of EM is used to send files

You can create an array by listing elements in square brackets and separating them with commas (,). The Ruby array can adapt to different object types.Ruby> ary = [1, 2, "3"][1, 2, "3"]Just like the string mentioned above, Arrays can be multiplied