Ruby

It is early to know that Ruby has 4 methods of equality, namely: "= =", "= =", "Equal?" and "Eql?", the usual procedures are used, but feel a lack of in-depth understanding of it, reading the rails part of the source code when you can not grasp the

=begin       conditional judgment statements include if statements, unless statements, case statements,=end#if  statements =beginif  conditions   then   processing 1elsif  conditions 2 then   processing 2else   processing 3end=enda = 10b =  20if a > 

CodeAs follows: Copy codeThe Code is as follows: require 'date' Day = date. New (2008, 2,-1)End_of_month = day. strftime ('% D'). to_ IYear_and_month = day. strftime ('% Y % m ')For today in 1 .. end_of_month doP sprintf ('% S % 02d',

After reading Ruby for a few days, I found many well-known syntax features in C #. Ruby was available a few years ago: 1. The Params keyword in C # Class program {static void main (string [] ARGs) {console. writeline (sum (); console. writeline (

Ruby's array is basically used. Compared with arrays in C #, the least habit is to allow negative indexes (somewhat similar to Javascript) Arr = [3, 4, 5, 6, 7, 8, 9] puts arr [0] #3 puts arr. first #3 puts arr [arr. length-1] #9 puts arr [arr.

An important feature of closures is that variables defined inside a process (method) can be referenced even after the method call is complete! (That is, the lifecycle is extended) Def method (n) puts "n = # {n}"; # Return proc {| I | n + = I} # key:

When testing the model, one change was observe. I wanted to test it, but the observer refused to execute it in rspec, but there was no problem with test env in the console. It took me a day to debug and finally failed to solve the problem. If you

My environment is Ruby 1.9.2p290 + rails2.3.4 + mysql5.5.15. When I run "DB: migrate", the error message is as follows:!!! The bundled mysql. RB driver has been removed from rails 2.2. Please install the MySQL gem and try again: Gem install

# Close command display @ echo off # message ECHO now, listing the controller, please not shutdown the DOS file! # Switch to the current path. Put the. BAT file and the. RB file together. set Pa = % Cd % # execute the ruby script Ruby test. rbpause

How many methods do you have to create a method? Most people may think of the def keyword Ruby. Code # Common method DefTele_you Puts"I am anleb" End # General method def tele_you puts "I am anleb" End Ruby code #

Class A def self. ask1 puts "the method of Class" End def ask2 puts "the method of instance" endend # Method of the Instance Object of the class. The method belongs to the new instance object generated by the class.P a. Methods. LengthP a. Class.

ArticleDirectory Ruby-adding a directory to $ load_path-what does it do? Similarities: all three are defined in the kernel and contain the meaning of something. Differences: 1. requre and load are used for files ending with. RB.

In Ruby, the so-called block-based method refers to the abstraction of the control structure. It was initially designed to abstract loops, so it is also called an iterator.Syntax: method_name do... end or method_name {}   1 # Block call

"Require" can be merged into. RB proposal, and can be omitted ". RB ". in addition, it will only commit at the first time. If it is "require" again, it will ignore Code highlighting produced by Actipro CodeHighlighter

1) install the firewatir gem Gem install firewatir   2) install the jssh Firefox extension Firefox 3.6 on Windows:Http://wiki.openqa.org/download/attachments/13893658/jssh-3.6-WINNT.xpi? Version = 1 & modificationdate = 1264489925906 3)

Rails3 is coming out, and it's time to start learning. You can find a good tutorial on the Internet: http://railscasts.com/episodes, which can be downloaded. Unfortunately, only 10 entries are displayed on each page and cannot be downloaded in

Get the currently running method name in Ruby on bigbold Code Fragment: Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Module KernelPrivate Def This_method_nameCaller [0] = ~   / '

Mailfactory is a simple mail package on rubyforge. With this package, we can easily send emails with attachments and HTML formats. However, currently, mailfactory has some problems in Chinese support, A patch is required.   Install mailfactory

ATTR _ * in ruby _* In Java, get and set are used to assign values to and read variables. In ruby: Read: Def name @ nameend Assignment: Def name = (myname) @ name = mynameend You can use attr_reader and attr_writer, or attr_accessor. For

The new version of will_paginate has abandoned this practice and switched to the gem method. This article builds an application named foobar to understand the usage of will_paginate.====================================C: \> rails foobar-d mysqlC: \>