Ruby

1. Install Cocoapods,ruby version of the low-"start updating ruby-" began to update the gem, this is a no return AH comrades, all kinds of permission denied, various paths do not exist, various paths do not have read and write permissions, various

Since you are ready to use bootstrap in your project, you will be prompted for a ruby version at 1.9.2 during the installation of Bootstrap, while the Ruby version that is currently in use is the 1.8.7 that comes with the Mac system. So you need to

Try upgrading Ruby with RVMhttp://blog.csdn.net/lissdy/article/details/9191351If you encounter the following problemSearching for binary rubies, this might take some time.No binary rubies available for:osx/10.11/x86_64/ruby-2.2.4.Continuing with

The class variables in Ruby, a lot of articles are not recommended, the main reason is that some of his features are prone to make some mistakes, especially in the wide use of meta-programming.The initial contact class variable may feel that he and

The basic format of the If judgment is as follows:If condition then #then可省略 processing end1. Determine if the file exists#!/usr/bin/env rubyif file.exist? ("/etc/hosts") print "OK" endPlus Else#!/usr/bin/env rubyif file.exist? ("/etc/hosts") print "

Part II Third-party frameworks and Libraries the first part of this book takes a deep dive into II main LIBRARIES:DR B and Rinda Chapter3:ringydingy including 6 parts: Installation Getting Started with

1.Rubymine new Ror ProjectFile->new Project??Select "New Application" under R ails??Click OK after build Ror project????2. Add ControllerAfter you create a new project , right-click new on the project name??Fill in COntroller's name, click OK??Build

After my first two posts "Ruby on Rails Environment Build" and "Ruby on Rails environment build MySQL database connection" We already have all the elements to develop Ruby on rails, but it's not always easy to hit commands on a DOS window every

Note: Now the http://rubyforge.org website has stopped running, replaced by the https://rubygems.org this website, the following in the need of the gem package can go to this site search download. The rest is done exactly as you say below. Ruby on

Said is the use of pdfkit, in fact, the work is still wkhtmltopdf.First, the new projectRails New Mypdf--skip-bundleEnter project: CD mypdf, open Gemfile:vim gemfileModify Source to Https://ruby.taobao.comAdded: Gem ' Pdfkit 'Run Bundle

RVM is a Ruby version management tool that also makes it possible to load and unload ruby1. Install Curl# sudo yum Install curl# curl-l Get.rvm.io | Bash-s Stable2. It is possible to fail as3. Follow the prompts to enter the command# Curl-ssl HTTPS:/

Expressions and variables:There is no difference between these two points and the other mainstream programming languages, which are skipped directly here. It is important to note that x=x+1 in Ruby can be written x+=1 but does not support x + +,

Ruby provides four types of variablesLocal variable: Lowercase letter or _ StartInstance variable: an instance variable can span a method of any particular instance or object, meaning that an instance variable from an object to an object is changed.

Symbol: Denotes "First name", such as the name of the string, the name of the identifier.How to create a Symbol object: precede a name or string with a colon: Test: " Hello Ruby "In Ruby, each object has a unique object identifier (Identifier),

The difference between Ruby learning notes-puts,p,printCommon denominator: Both are used for screen output.Different points:Puts the output will be wrapped (if the content parameter is empty, only one newline symbol is output), and if there is an

Tutorial on block code blocks in Ruby and tutorial on rubyblock code 1. What is a code block?In Ruby, the code between {} Or do... end is a code block. A code block can only appear behind a method. It is called by the yield keyword on the same line

Introduction to rake and database data migration under Ruby on Rails, rubyrails I don't know whether you have written data to the Migration file through Migration. I believe you have done this for both laruence And Newbie. In fact, this is not

Explain the single-piece method and single-piece class in Ruby, and explain the ruby single-piece Method Single-piece Method Ruby allows adding methods to a single object. This method takes effect only for a single object. It is called a

Analysis of Proc class and Proc class method Proc. new in Ruby, procproc. new Proc is the process object obtained after the block and its context (the scope of local variables and the stack framework) are objectized. You can use Proc like an

Monkey Patch Programming Method and Its Application in Ruby, patchruby What is Monkey Patch )? In dynamic languages, functions are appended and changed without modifying the source code. Objective of using Monkey patch:1. append Function2. Function