Ruby

This side is just a general, specific to see the document itself. 1 Connection SQLite: Require ' SQLite ' db = SQLite::D atabase.new ("library.db") db.execute ("Select Title,author from　Books ") Do |row| p row end db.close　　　　　 2 connection

This article mainly introduces the comparison between class variables and instance variables in Ruby, this article explains the difference between 4-point class variables and instance variables, and gives the code example, the friend can refer to

1, what is the code blockin Ruby, the code between {} or Do...end is a block of code. A code block can only appear after a method, and it is invoked immediately on the same line as the last parameter of the method, which is called by the yield

Rake Introduction Rake means Ruby make, a code-building tool developed with Ruby. But why does Ruby need rake? It's supposed to be that Ruby code doesn't need to be compiled, so it doesn't have to be rake. It turns out, rake has another magical

Two days ago, when writing code, I suddenly received a warning that there was an XSS vulnerability in the project code, then immediately based on the report of the URL to troubleshoot the page code, although quickly repaired, and the same issue two

1.try never throws an exception to return nil when not Copy Code code as follows: province_id = Province.find_by_name (Prov). Try (: ID) 2.find (: A: Condotions) method does not speak but with Copy Code code as follows:

Require,load for files, such as. RB, and so on, at the end of the file. Include,load is used to include a module in a file.Require is typically used to load library files, while load is used to load configuration files. 1, require: load a library,

Developers have predicted that rails cannot be the mainstream of business applications. But as rails has become more and more popular in web development, more and more companies are starting to invest more attention on rails, while rails

I went to bed 5:30 last night, frantically configuring the vim environment and finally finished the fantastic Ruby on Rails development tool. I have installed the Vim-ruby in this vim environment, of course this should you to install, in Ubuntu

So far, it should have come to an end. There are a total of Essays. Simply add an integer and write it again. IDE Environment. AllCodeI use all of them Ruby Built-in Editor Scite Compiled , Inconvenient , With Rails There are

In December 30, ActiveState released the latest ide: Komodo 3.5.1.This ide mainly provides support for Dynamic Language Development. Starting from this version, Ruby has finally been officially supported (version 3.5 is only the official Mac OS

For development using the ROR framework, you only need scite + Resource Manager + command line. However, if you do have a hard time forgetting the IDE environment and machine configuration, we recommend that you go back to the three muskeys era and

It's pretty rare I recommend new blogs to follow on Ruby inside. Not because I don't like them-I link to their posts all the time!-But because it's hard to tell if a new blog is going to keep going and be worth your while. Well, the Ruby community

At the beginning of 2006, I received a legacy project assigned by the company, asking me to be responsible for a server end of a C/S-based system. In fact, the system is based on the HTTP protocol, because the client's colleaguesI don't know much

Install and uninstall Ruby in Ubuntu In ubuntu12.04, run the following command to install Ruby 1.8 by default.1 $ sudoapt-Get installruby I. The following describes how to install ruby1.9.3 (in some versions of Linux, 1.8 must be installed

Ruby calculates the maximum sum of Adjacent Elements in the array. Wei renyan 2010.8.21 I recently studied programming Pearl River and was very interested in the questions raised in the book. So according to the description in the book, I used Ruby

1. Block: A block in Ruby is a code block composed of multiple lines of code. It can be considered as an anonymous method and is often used to iterate an array or range (such as the each or times method ); the syntax format is as follows: { // Code }

Cause: I often need to check the status of some Windows Services. Every time I use the control panel> Service to view the Service status, it is not only a waste of time but also boring. Simply write a Ruby script. Let the Ruby script notify me of

Use RVM to install ruby & rails in ubuntu   I have discussed how to install ruby in the source code mode in ubuntu. However, this method is always troublesome. You can use rvm for version management, and you can also use rvm for installation. linux

JSON has gradually become a mainstream data exchange format on the Internet due to its simple and convenient data structure. Before discussing the JSON Conversion Method for Nested objects, let's look at the simple ruby JSON conversion.First, the