ruby on rails tutorial learn web development with rails
ruby on rails tutorial learn web development with rails
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window function to do the same work over 4 times times in 1.1 seconds.
SELECT Depname, empno, salary, rank () over (PARTITION by depname order by salary
DESC) from
empsalary;
Depname | Empno | Salary | Rank
-----------+-------+--------+------
Develop | 6 | 6000 | 1
Develop | 7 | 4500 | 2
Develop | 5 | 4200 | 3
Personnel | 2 | 3900 | 1
Personnel | 4 | 3500 | 2
Sales | 1 | 5000 | 1
Sales | 3 | 4800 | 2
4 times times the acceleration has been impressive
If the reader has developed a rails based application, but there is a lot of confusion about the data transfer between MVC, congratulations, this article is about summarizing the methods and techniques of the rails data transfer. Ruby on Rails 3 (collectively, rails 3) is th
Agile Web Development with Rails Translator (18)
The only interesting thing here is the code associated with the selection list. We have already assumed that the list of valid payment options is a property of the order model-it will be an array of an array in the model file. The first element of each sub-array is made into a string that is displayed as an option
@ localhost www] # yum install sqlite-devel[Root @ localhost www] # gem install sqlite3-VOr[Root @ localhost public] # bundle install -- without sqliteNote that the rails server must be in your web root directory. If you install the bundle separately, it must also be in the web root directory. Otherwise, an error is reported.2. Start the server of
The debate On Ruby On Rails in the Java Community is already fierce and there will be no signs of stopping in the future. Rails Supporters praised it for its amazing efficiency, which is about compared with Java development. As a Java programmer, your subconscious reaction is that you do not trust the high efficiency o
you are a domestic server, it is recommended to replace the RVM installation source with the Taobao mirror server, so that the installation can be faster!
' s/ftp/.ruby-lang/.org//pub//ruby/ruby/.taobao/.org//mirrors//ruby/g ' ~/.rvm/config/db
Install Ruby with
Ruby on Rails (also called Rails) is a Ruby Framework for Internet applications that support databases, what are the core features of Ruby on Rails and the articles into the world of Ruby
Ruby on Rails development is essentially different from Java development. In
Crossing boundariesIn the last phase of the series, Bruce Tate will outline the main differences found when developing a complex and scalable Web site from scratch using
Agile Web Development with Rails translations (18)
Here, the only interesting thing is the code associated with the select list. We have assumed that the list of valid payment options is an attribute of order model-it will be an array of an array in the model file. The first element of each sub array is a string that is displayed as an option selected, and the s
I was eager to learn something new. I heard that ROR is very efficient in development, so I chose Ruby on Rails. It was really difficult to install it, here I will write down my installation experience:
1) install Ruby
Download installation package: http://rubyforge.org/fr
There are many popular frameworks for online Web application development at the moment. There are also many different types of frameworks, such as those with a large number of plug-ins that can make you faster iterations (such as Rails), or other very simple and low-level (like flask).Two relatively more popular frameworks in
, while the Java Enterprise Edition programming language is "too malformed", which is not easy to use.
At present, there is already a workshop introducing Ruby on Rails, and another seven or eight books are being written in the workshop. At the first Ruby conference last year, a total of 60 developers attended the conference. about 200 people attended the confere
It brings great opportunities for the development of Web solutions. This is the first article in the DB2 with Ruby on Rails series. The following articles mainly show you how to get started with the DB2 database and Ruby on Rails.
Ruby programming language is developed by the Japanese pine line, is a simple and fast object-oriented programming language, today mainly talk about the ruby framework--ruby on Rails (http://www.maiziedu.com/course/ruby/), Maybe some friends don't like
Agile Web Development with Rails Translator (16)
8.5 cycle C3: Complete shopping cart
Let's start processing the empty shopping cart connection on the shopping cart display. We know we have to implement a Empty_cart () method within the store "controller". Let's delegate its responsibilities to the cart class.
April 17, 2006 Update
def Empty_cart
find_cart.emp
Agile Web Development with Rails Translator (15)
Organize your shopping cart
Before we finish this work and show the customer, let's tidy up the shopping cart display page. Instead of simply dumping this product, let's add some formatting. At the same time, we can add some continuous shopping connections so that we don't have to press the back button only. Whe
Mongrel is a ruby HTTP library used to deliver Ruby web applications. In fact, do not use Apache mongrel alone can run the ROR program, the online tutorial using Apache is used to do web proxy, so that the website will not have a http://www.unbe.cn: 8081/such port declaratio
Reference data:ForRuby on RailsIf you are not clear about it, you can refer to the following link information.Ruby on RailsInformation.
Ruby: A pure Oo Script Language ..Ruby on Rails: Quick Building Web Of MVC Architecture Framework Description : Integrated Environment : Instant
"0" Ruby on Rails series review[Ruby on Rails Series] 1, Development environment preparation: Installation of VMware and Linux [Ruby on Rails series] 2,
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