Ruby

It's really tedious to install/update the Ruby environment under your Mac.First, Mac OS X comes with a ruby environment, and we manage the Ruby version with RVM (Ruby version manager)Just execute the following 2 sentences:$ gpg2--keyserver

The above rough introduction of the next Ruby, originally did not want to install this, because I was learning through the website, can be compiled online. But given the comprehensiveness of the content, try it.Refer to the next person's

1. User model(1) Database migrationRails uses a relational database to store data by default, with tables in the database consisting of data rows, each row having corresponding columns, and corresponding data properties. Once the column names are

In a nutshell, it isClass can instantiate module noEverything else is the same.A little difference in inheritanceClass is a keyword that uses Application Scenarios for moduleAs a namespace, put the general const or their own class as mixin, put the

Installing the ruby Environmentinstalling Ruby through homebrew1. First, you need to install the homebrew on the systemAt the command line, execute the following command to complete the Homebrew installation (you will be prompted for the current

Gsub ()The first parameter is Reg, and the second parameter is the character that is replaced.Returns the changed string with no side effects on the original string.No match will return the original string.irb(main):001:0"regWord"=>"regWord"irb(main)

1. Download Ocra-1.3.1.gem file2. Open the "Start command prompt with Ruby" Command Window3. Enter "Gem install e:\ocra-1.3.1.gem-l" Installation Gem,#=> "successfully installed ocra-1.3.1"4, enter "D:\>ocra youruby.rb" to start packaging, #=>

This article focuses on learning about Ruby you need to know about knowledge (RVM, GEM, bundle, rake, rails, etc.), the needs of friends can refer to the nextRubyThat's not going to be a lot.RVMTo help you install the Ruby environment, help you

This two weeks work more content, usually oneself also a bit not in the state, learn something a little, take advantage of now still a bit state, hurriedly review before study of Ruby Bar.Ruby was the first language that I really started to touch

Naming style guide in Ruby programming and ruby programming style guide Name the identifier in English. # bad - identifier using non-ascii characters заплата = 1_000 # bad - identifier is a Bulgarian word, written with Latin letters (instead of

Analysis of the use of regular expressions in Ruby, analysis of ruby Regular Expressions If you only need to search for the text of a string, do not use a regular expression: string ['text'] You can use string [/RE/] to query a simple structure.

Ruby configures rspec and RestClient to detect the server, rspecrestclient If you manually test the Restful service, it will be very monotonous. Of course, there are some browser plug-ins that can help you manually test through visual interfaces,

Basic Ruby syntax and ruby syntax There are multiple ways to create a String object. The most common method is to use the string literal (literals), that is, the character sequence between a group of single quotes or double quotes. The difference

Ruby implements the longest common subsequence algorithm and ruby sequence algorithm. Longest Common subsequence, LCS, dynamic planning implementation. #encoding: utf-8#author: xu jin, 4100213#date: Nov 01, 2012#Longest-Commom-Subsequence#to find a

The usage of the Profiling tool in Ruby, rubyprofiling The built-in profiler implementation is very simple. In ruby2.2, there are only 150 lines of code. You can see its implementation profile. rb. The built-in profiler is very convenient to use.

Use of each and collect in Ruby for iteration, rubycollect The iterator is nothing, but the set method is supported. Objects that store a group of data members are called collections. In Ruby, arrays and hashing can be called collections. The

For example, Ruby on Rails's page caching mechanism, rubyrails With the page cache, Rails can no longer intervene. To some extent, this is a good thing, because you can indeed achieve excellent performance. Rails only needs to create an HTML page

Every programmer should learn to use Python or Ruby If you are a student, you should be C, C ++ and Java. There will also be some VB, or C #/. NET. You may have developed some Web pages. You know some HTML, CSS, and JavaScript knowledge. In general,

Basic Ruby knowledge Create class: the class name is followed by the class name. The first letter of the class name must be capitalized. The new method is used for instantiation. The constructor in c # has the same name as the class. In ruby, the

Brief description of the iterator in Ruby and brief description of the Ruby Generator The iterator is a method supported by the set. Objects that store a group of data members are called collections. In Ruby, arrays and hashes can be called