Ruby

Demandfunction, you need to pass a string through a parameter to do a regular match' [0-9]+ ' def func (str, reg) Str.scan (reg) EndSince Reg is defined elsewhere, Reg is a string, which is found to be unable to be used directly for regular

Found on web http://www.rubychina.net/downloads/--〉ruby on Windows--〉ruby 1.8.6 One-click Installer Stable version (recommended)Click the right mouse button, save as ..., deposit your local hard drive, this completes the download.Run the downloaded

1. Definition of similarityWe define, then, we set, then, | C|=s, then the similarity of p=,p (0,1)2. Design of similarity detection algorithmAlgorithm design:Defines 4 characters as a string, divides the t1,t2 into strings, and if the remaining

21: Point game, command line, and face image process. Try again later. # This is game 21 point # No operation is performed if the operation command is null. N: Next, draw the card. W: The card ends; l admit defeat $ ope = ''$ prompt = '>' $ X1 = 0

Array and hash table Ruby arrays and hash tables are index sets. Both objects are saved and can be read by keys. The key of the array is a number, but the hash table supports the object as the key. They all grow with the addition of new elements.

To install Ruby, go to the ruby official website to download the Windows Installation Package of ruby1.56. After installing Ruby, open the DOS window and enter ruby-V to display it. Ruby 1.8.6 (patchlevel 0) [i386-mswin32] indicates that Ruby

I. Numbers Ruby supports integers and floating-point numbers. integers can be of any length. Integers within a certain range are stored in binary. They belong to the fixnum type. If they exceed this range, they are automatically converted to

1. Common Ruby data types: Numbers, strings, booleans my_num = 25my_boollean = true (or false)my_string = "Ruby" 2. Common mathematical operators in ruby Add (+) minus (-) multiplication (*) Division (/) power (**) Evaluate remainder (%) 3. Ruby

Past Review Last time I talked about the installation configuration of vmwarevm and the installation of scientific Linux 6. x system. This time, our main task is to complete the configuration of the Ruby on Rails development environment on the

Recently, there is a need to use a string as a class. For example: There is a string "chinamag" that calls methods under the chinamag Class Based on this string.   Solution: 1. rails can use the constantize method. Pry (main)> 'chinamag'.

I used to want to use Java for something similar. Today I see Ruby already has ----- Gem install Chardet-y ----- Require 'rubygems'Require 'universaldetector'Require 'net/http'Net: http. version_1_2Net: http. Start ('www .sina.com.cn ') {|

Example tutorial on Parsing JSON data in Ruby and Ruby on Rails, railsjson Ruby parses JSONExample of Json parsing IN Ruby: Json = '["a", "B", "C"] 'puts "Unsafe # {unsafe_json (json ). inspect} "# output Unsafe [" a "," B "," C "] Ruby parses Json

Build a ruby on rails development environment under CentOS7, centos7rails 1. Install rvm Curl-L https://get.rvm.io | bash-s stable Rvm is a command line tool that provides management and switching of Multi-version ruby environments. You can also

Basic instructions for using regular expressions in Ruby, ruby Regular Expressions Built-in support for regular expressions is usually limited to scripting languages such as Ruby, Perl, and awk. This is a shame: although regular expressions are

String object learning notes in Ruby, rubystring 1. String object definition You can use "" And ''to define String objects. For simple strings, you are advised to use'' to define them. The efficiency is higher than "". The difference between "" And '

Implementation example of ruby declarative syntax and ruby declarative example ActiveRecord can be easily declared to define the associations between models. For example: Copy codeThe Code is as follows:Class Topic Has_timeout: postsBelongs_to:

Jquery shows hidden input objects and jqueryinput objects. 1. Enter an input box when selecting another department # Html $ {item. name} // Js // display the function deptChange () {var deptid =$ ('# deptid') in the input box of other

Scaffolding is a very easy method for rails. Some simple addition, deletion, modification, and query scaffolding can be implemented, saving unnecessary trouble. How can we use rails scaffolding? Let's explain it today. . Specify the port to start

Array usage in Ruby, ruby array usage Ruby arrays are ordered. What about any object ?? The set of integer indexes. The elements in each array are associated and an index is mentioned. Array subscript starts from 0, such as C or Java. Negative index

Ruby Array (Array) learning notes, rubyarray 1. array Definition Arrays in Ruby are dynamic arrays, And the stored data does not have to be of a limited type. The length of the array is dynamically extended according to the storage requirements.