Ruby

1. Creating an array A=array.new (6,obj=nil) #=> [nil, nil, nil, nil, nil, nil] set default valuesA=array.new (6) #=> [Nil, nil, nil, nil, nil, nil] The default value is nilA=array.new (6,obj=1) {|obj| obj+1} #=> [1, 2, 3, 4, 5, 6] default values

Today is free to install the current more mature CSS preprocessor--sass, Baidu on the internet a bit, http://blog.csdn.net/zhouzme/article/details/45059419 according to the steps of the landlord installation,Install sass suddenly appeared problem,

The Ruby language was studied by the Japanese as (まつもとゆきひろ, Yukihiro Matsumoto, nicknamed Matz) from 1993 onwards, with 2 years to go before the first version of the Ruby language: Version 0.95. According to the bank's description: He has always

How to quickly and correctly install Ruby, Rails running environmentHttps://ruby-china.org/wiki/install_ruby_guideFor newly-introduced developers, how to install Ruby, the operating environment of Ruby Gems and Rails can be a problem, this page

Demand:Students copy questions and do problemsInitial code#-*-encoding:utf-8-*-#Student A's Test paper classclassTestpaperadefQuestion1 puts'Yang had to get, later gave the Guo Jing, refining into the sword, the Dragon Sword of the Xuan Iron may be [

Page 3Overview Description and execution: Python and Ruby are highly interactive;○ Compilation and execution: Pascal, C, fast.N local execution, such as C, C ++;N virtual machine execution, such as Java, C #. ○ Dynamic languages,

We strongly recommend that you use the following Online Learning Websites: http://tryruby.org: Ruby returns the last value in the method by default. To return multiple values, you can use an array. You can return a value by forcibly declaring

When writing top-level functions in ruby, there will always be a problem: Who is self, who is the method, and what is the method. As follows: 1 p self2 3 p self.class4 5 def talk6 p self7 end8 9 talk Output main, object, main It can be seen that

The ruby environment is used for sass file compilation. Interface-based koala tools and command line modes cannot be used, which is really annoying. It is easy to see that Chinese comments cannot be compiled or garbled, and the solution after

Rails has a built-in Log function, or, more accurately, Rails exposes the Logger object, which can be used in all Rails programs. Logger is a simple Log framework transplanted from ruby (you can type ri Logger in the ruby command line to view the

I have been busy working recently and have not continued to learn rails, but I am still paying attention to it. At the end of the year, when we review the past year, companies and organizations in the industry have continuously launched new

Tutorial on installing the Ruby interpreter on the operating system. Ruby installation-LinuxThe steps for installing Ruby on a Linux machine are listed below.Note: before installation, make sure that you have the root permission.Source code

Some basic knowledge about modules in Ruby and basic knowledge about Ruby modules A module is similar to a class. It can also be called a class that cannot be instantiated ". Because the Class is a subclass of the Module Class, it may be better to

Statistics on the number of file lines, number of words, and number of characters in Ruby, and number of ruby lines In Ruby, we define a wc method to count the number of lines, words, and characters in the file. The ruby code program is as

Ruby concise learning notes (2): class inheritance, attributes, class variables, and ruby learning notes 1. How to declare a subclassCopy codeThe Code is as follows:Class Treasure In this way, the property names and descriptions of Thing classes are

Ruby: Case expression and rubycase expression 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

Six Methods for executing shell commands IN Ruby: rubyshell When we need to call the shell command of the operating system, Ruby provides us with six methods to complete the task: 1. Exec method: The following example shows how to replace the

Examples of common events such as bind, hover, and toggle in jquery, jquerytoggle 1. $ (document). ready () $ (Document). ready () is a typical method in jQuery to respond to the onload event built in JavaScript and execute the task. It has a

We all know that the expression operator has only one input value. This is common in C and Java. Today we will discuss the unary operator overloading in Ruby.Unary operators include: + -*! & Etc. To avoid confusion with the value +-, to overload the

Various sorting algorithms implemented by Ruby and Ruby Time Complexity: Average (n ^ 2) Bubble sortCopy codeThe Code is as follows:Def bubble_sort ()(A. size-2). downto (0) do | I |(0.. I). each do | j |A [j], a [j + 1] = a [j + 1], a [j] if a [j]>