Ruby

1.dos execution under Project path ( c:home/trunk/src below):Ruby Script/generatemigration Addpermissionsdata (name casual)Generate Timestamp fileclass addpermissionsdatadef Self . upp = permission.create ({: name = ='Zhang San',:p arent_id =' 367 '

1. Reference file DifferencesRuby: A file in the same directory, such as/USR/LOCAL/RUBY/FOO.RB and/usr/local/ruby/bar.rb two files. If you are directly in the FOO.RBRequire ' bar 'the BAR.RB error is not found during execution. this is because

When you are sharing objects in multi-threaded processing, multiple threads can modify the same object at the same time, possibly in an inconsistent state, and be aware of it when used. Example: Test.rb x = 010.times.map do |i| Thread.new do

intends to learn a scripting language, but do not know which to choose, the Internet to find information, finally difficult to choose in Ruby and Python, so list other people's evaluation, choice, opinion, etc. for themselves and others reference;In

Usually we use the following form when we write code, construct nested data, or initialize a variable:A | | = []  ; A = B | | C A = a | | []This form ensures that the variables are initialized when they are accessed, giving us a great deal of

#numbers are classified as certificate integer, floating-point number float (corresponding to double in other languages), and plural complex#integers are divided into fixnum and Bignum,fixnum and Bignum to each other, and these are the operations

The previous index page, which shows Hello World, is now modified to show the data we entered in the Rails console.1. Modify the actionAs described in the previous section, "Ruby on Rails" and the route map I learned, modify the

#Encoding:utf-8require"Open-uri"require"Timeout"require'RubyGems'require"Nokogiri"URI="http://api.map.baidu.com/direction/v1?mode=driving&origin=&destination= Peking University &origin_region= Beijing &destination_region= Five Street, &output=xml&ak=

This series is the answer to the exercises in "seven weeks and seven languages. This book does not stick to syntax details, but compares the programming paradigm between various programming languages (not popular) horizontally. It is a good book

How to build a ruby gem   1. First you will creata a user in rubygem.org (https://rubygems.org /)     2. Create the directory structure like this:  Java code $ Tree . ── Cc_hola.gemspec ── Lib ── Cc_hola.rb You can use any name but you must

  Ruby is really better than Java? Ruby on Rails Founder: Goodbye to JavaTwo

Upgrade mac OS Mavericks to the latest version. Json loading error:Copy codeThe Code is as follows:Gem install json-v '1. 8.1' Building native extensions. This cocould take a while...ERROR: Error installing json:ERROR: Failed to build gem native

Installation steps: 0 × 00-clone the Metasploit project from github to the local device; 0 × 01-install and configure postgresql; 0 × 02-install a specific version of ruby and resolve dependencies; 0 × 00 clone Metasploit project from github to

Implementation Code: Copy codeThe Code is as follows:Class DesRequire 'openssl'Require 'base64'ALG = 'des-EDE3-CBC'KEY = "mZ4Wjs6L"DES_KEY = "nZ4wJs6L"# EncryptionDef encode (str)Des = OpenSSL: Cipher. new (ALG)Des. pkcs5_keyivgen (KEY, DES_KEY)Des.

1. Insert sortingCopy codeThe Code is as follows:Seq = [3, 4, 9, 0, 2, 5, 9, 7, 1] 1. upto (seq. length-1) do | I |If seq [I] Tmp = seq [I]J = I-1While (j> = 0 & tmp Seq [j + 1] = seq [j]J = J-1EndSeq [j + 1] = tmpEndEnd Seq. each {| num | puts num}

The ruby language is still updated frequently. However, a large number of versions make Library compatibility a big problem. Some gems explicitly do not support ruby earlier than a specific version, while some gems are not compatible with higher

Ruby Stone scissors cloth game Copy codeThe Code is as follows:# Encoding: UTF-8Arr = ['stone ', 'scissors', 'bo']Win_arr = [['stone ', 'scissors'], ['scissors ', 'cloth'], ['cloth ', 'stone']# Add the random computer value to the result

1. Install the system dependent Software Package sudo apt-get install build-essential git curl imagemagick nodejs redis-server libcurl4-openssl-dev libxml2-dev libxslt-dev libmysqlclient-dev 2. confirm that the curl version is 7.32 or later. if the

Profile. rb is the profiler prepared for the Ruby program. It can count and output the running time of each method to locate the performance bottleneck of program execution. This time, we will use it to analyze the running time of the script. The

GitHub address: https://github.com/adamsanderson/qwandry Qwandry can quickly locate the tools we need to find library files and projects. There are many methods for Fast Location in Ruby, And I know three of them: cd `bundle show active_record` Use