Ruby

One, the statement of the blockblock is declared after the function call, using the {..} Enclosed, or do.. End encapsulation. {} is typically used on single-line statements, do ... End is used on multiple lines of statements. (1..4). each{|v|

1, what is the code blockin Ruby, the code between {} or Do...end is a block of code. A code block can only appear after a method, and it is invoked immediately on the same line as the last parameter of the method, which is called by the yield

Ruby Installation-LinuxThe following is a list of steps to install Ruby on a Linux machine.Note: Before installing, make sure you have root permissions.SOURCE InstallationDownload the latest version of the Ruby zip file. Please click here to

Example 1 Require ' NET/SMTP ' Require ' iconv ' Def send_email (from, From_alias, to, To_alias, subject, content) Subject_n = Iconv.conv (' utf-8 ', ' GBK ', subject) msg = From: #{from_alias} To: #{to_alias} mime-version:1.0

Use the String#strip method to remove all spaces The code is as follows Copy Code "Hello". Strip #=> "Hello""Tgoodbyern". Strip #=> "Goodbye" In addition, Lstrip and Rstrip remove the spaces at the left and

The internet is all about rake:db:sessions:create. But for the RAILS4 version, it doesn't work.Here is my own operation for the RAILS4 version.RAILS4 Session data Table creation: Please refer to this document: Http://www.cnblogs.com/heimirror/p/35369

YieldAll "Method (methods)" implicitly follow a "block" parameter.The block parameter can also be given explicitly, in the form of a "&" in front of the parameter, such as DEF fn (Arg1, arg2, &block) end, where the &block is explicitly given the

Installation will not say, the official website has, but today released ruby2.3, so updateEnter the. Rbenv directory, perform a git pull update, but update rbenv, execute rbenv install-l and do not have the latest 2.3.0 release version.Then I looked

Ruby is a gentleman in computer language, if you want to use a word to describe, it must be elegant, there is such a rubyist, his motto is "Write elegant program, do an elegant person", he is from seven cattle small partner "mint" Co-founder and CTO

I've been working on Ruby for a while and have recently had some leisure events, learning about Ruby and preparing for future Ruby on Rails development.Ruby was founded in 1993 by as of Japan (まつもとゆきひろ/yukihiro Matsumoto). In contrast to chatty's

In the Ruby language, the specific differences between Class_eval and Instance_eval are obvious, Class_eval is for a class object, and the instance method can be defined in this object. While Instance_eval is for an object, the class opened is

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 statement corresponding to the true condition expression. In the second

Deploy the Ruby server and ruby# Create a project directory/Opt/logs/TV-cibn-cms# Install rbenv and ruby 1.9.3 IN ruby# Install and compile related packagesYum install-y gcc openssl-devel libyaml-devel readline-devel zlib-develSu-ruby #/home/ruby#

Introduction to file operations in Ruby and file operations in ruby Ruby provides a complete set of I/O-related kernel modules. All I/O methods come from IO classes. Class IO provides all the basic methods, such as read, write, gets, puts, readline,

Four Methods for Equality judgment in Ruby and four methods for ruby equality judgment It has long been known that ruby has four equality judgment methods: "=", "=", and "equal ?" And "eql ?", It is used in common programs, but I feel that I lack a

A summary of some common file operations in Ruby and a summary of ruby operations A lot of Ruby beginners need to learn. Now we are trying to use Ruby to write a script. Many file-related operations are used, which are sorted in stages here. This

Remote RPC method calling through Redis One of the things I find I often study and excited about is the expansion of the system. Now, this has different meanings for different people. As part of the migration of Monolithic applications to the

Ruby uses the Monkey Patch Monkey Method for program development example, rubymonkey Monkey Patch is a special programming technique. Monkey patch can be used to dynamically modify (expand) classes or modules at runtime. You can add a Monkey Patch

Explain the methods in Ruby and the Ruby Methods The Ruby method is very similar to the functions in other programming languages. The Ruby method is used to bind one or more repeated statements in a unit. The method name should start with a

Methods and code segments of basic Ruby knowledge The method in Ruby is a code block with a name. It is a parameterized code associated with one or more objects. The method name, receiver (object), parameter value, and the value of the last