ruby logger example

The example explains the Hook method in Ruby and adds a hook to the method call. The example explains ruby. The Hook method is similar to the event-driven device. You can execute a specific callback function after a specific event occurs. This callback function is the hook method (more vividly described: The Hook metho

Example of an interactive program developed by ruby: ruby Development Implement the interaction function in a terminal similar to pry, ronin, and msf. ripl gem is mainly used here: 1. Call defined methods, such as help2. Be able to execute system commands3. ruby parsing similar to irb/pry Installation: gem install ripl

Example parsing: Implementation of observer mode in Ruby design mode development, and ruby Design Mode In general, the observer mode should be defined as follows: building a clean interface between the source of news that some object has changed and the consumers of that news. The observer mode establishes a clean interface between the producer and consumer of th

Example of how to optimize Ruby code to speed up the program running, ruby speed This article mainly introduces how to increase ruby gem contracts. ruby speed by 10 times. Contracts. ruby is used in my project to add code contract

The example explains how Ruby uses the decorator mode in the design mode, and the ruby design mode. OverviewIf you are engaged in object-oriented development, adding behavior to a class or object and using inheritance mechanisms, this is a basic feature of all object-oriented languages. If an existing class lacks some methods, or you need to add more functions (C

The example parses the value types and constants in Ruby AND the ruby numerical constants. Number)Integer)There are two types of integer types. If the value is within 31 characters (four bytes), it is a Fixnum instance. If the value is exceeded, it is a Bignum instance.The integer ranges from-230 to 230-1 or-262 to 262-1. Integers in this range are Fixnum-like ob

Example of writing code for exception handling in Ruby, and ruby Exception Handling A single exception uses the fail keyword only when an exception is caught and thrown repeatedly (because you do not fail here, but are accurate and intentionally throw an exception ). begin fail 'Oops' rescue => error raise if error.message != 'Oops' end Do not specify an

Example parsing for Hook methods in Ruby and ruby hook instance Parsing By using the Hook method, we can intervene in the life cycle of Ruby classes or modules, greatly improving programming flexibility.The following hook methods related to lifecycle are available: Classes and modules Class # inherited Module # in

Ruby implements the insertion Sorting Algorithm and the advanced two-way insertion sorting code example, ruby two-way BasicInsert a record to a sorted table to obtain an ordered table with one added record. In addition, the most critical point is that it moves all records larger than the current element to leave the insert position "self. After n-1 troughs are in

An example is provided to explain the regular expressions in Ruby and the regular expressions in ruby. A regular expression is a special character sequence that can help match or find other strings or strings. The pattern used maintains a special syntax. The regular expression text is a slash between a pattern or any separator % r is as follows:Syntax: Copy codeT

Example of the use of hundreds of semicolons and literal values in Ruby: ruby percent Use % () (abbreviated as % Q) for a single line string that requires interpolation and embedding double quotation marks ). Multi-line string, preferably heredocs. # bad (no interpolation needed) %( Do not use % q for strings without 'and. Unless many characters need to be es

Ruby parsing JSONRuby Parsing JSON Example: JSON = ' ["A", "B", "C"] ' puts "Unsafe #{unsafe_json (JSON). Inspect}" #输出Unsafe ["A", "B", "C"] Ruby parses JSON to parse the above JSON string into array. Such a method is not safe, for example: JSON = ' puts ' Danger'll Robinson ' puts ' Unsafe

Ruby Global Variables Global variables begin with $. The value of an uninitialized global variable is nil, and a warning is generated when the-w option is used. Assigning a value to a global variable changes the global state, so it is not recommended to use global variables. The following example shows the use of global variables. #!/usr/bin/ruby $gl

The improved Ruby development environment in NetBeans 6.1 The NetBeans 6.1 Chinese version, released early this month, offers a number of new and extended features such as high-performance, JavaScript Editor extensions, Spring framework unification, and Easy-to-use MySQL support. For more information about new and extended features of NetBeans 6.1, see the following: NetBeans IDE 6.1 Information: http://www.netbeans.org/community/releases/61/index_z

Ruby is currently the most flexible and agile programming language. It has special application methods and can bring a pleasant programming environment to programmers. Here we will learn the skills for Ruby to get the current class name. Using pp () to output two-dimensional arrays in Ruby Ruby on Rails directory fi

: http://www.baidu.com/ Step 2: enter 'watir' in the search text field. Step 3: click the 'baidu submit' button. Expected Result: A Google page with results should be shown. 'download.csdn.net ' should be high on the list. Actual Result: Test Passed. Found the test string: 'download.csdn.net '.Actual Results match Expected Results. End of test: Google search. Last Step Close IE!!>Exit code: 0 When running the above script, the system prompts "ruby Wat

good query, but a lot of content is too simple to say clearly, and the content is not complete): https://hulufei.gitbooks.io/react-tutorial/content/index.htmlReact official English document: https://facebook.github.io/react/docs/getting-started.htmlReact Chinese document (this document is poor): http://reactjs.cn/react/docs/getting-started-zh-CN.htmlReact Chinese documents provided by the Geek academy: http://wiki.jikexueyuan.com/project/react/Another REAC Chinese document (this is more compreh

Example parsing: Use of Strategy Mode in Ruby Design Mode Programming, rubystrategy Today, your leader is eager to find you. I hope you can help him. He is in a hurry to go to the meeting. What can I do? You are curious.He told you that there is a user information table in the database of your project, which stores user data. Now you need to perform a selective query of user information. He said that it wil

Example of using Builder mode in Ruby Design Mode Programming, rubybuilder Let's first review the basic concepts of the design model:DefinitionSeparates the construction of a complex object from its representation, so that different representations can be created during the same construction process.The builder hides how the product is assembled, so if you need to change the internal representation of a pro

, let's create the controller first. The command line is as follows: Ruby script/generate Controller Hello This produces a controller that corresponds to the c:/rubydev/first/app/controllers hello_controller.rb Create an action, which is to modify the contents of the C:/rubydev/first/app/controllers hello_controller.rb file as follows: Class Hellocontroller def thereEndEnd Step Seventh: Write the there.rhtml below the/app/views/hello directory, which