Ruby

Yesterday I asked the first question in stackoverflow and was despised... This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form "... The problem is as follows: I have a CSV

Ror has been blooming abroad for a long time, but it has always been a bit cool in China. Except javaeye, I rarely hear the success stories of domestic ror. On the infoq Chinese site a few days ago, I saw a piece of news from Jeff Xiong. I

1. syntax check (-C) Execute IN RUBYProgramWhen using the "-c" command, the Ruby interpreter does not execute the program, but checks whether the program is to be executed.CodeCorrectness Ruby-C eg. Rb 2. Enable warning (-W) Run the program with

(1) Everything in ruby is an object, including a constant.For example, you can use the. Class Attribute to view the type of an object. You can see that the type of constant 1 is fixnum, and 1 is just an instance of fixnum. You can also use the-37

Go directlyCodeRectangle. Rb Class RectangleAttr_accessor: widthAttr_accessor: Height Def Initialize (wdth, HgT)@ Width = Wdth@ Height = HgTEnd Def Area () Return @ Width * @ HeightEnd Def   + (Addrectangle)

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> Class A Def SayPuts " I'm " EndEnd Class B A Def Say # When super is added, it will not be overloaded and the subclass

Conversion of GBK and UTF-8 Use GBK instead of gb2312, because GBK not only contains simplified Chinese, but also traditional Chinese, is a large character set. # Utf8 to GBK Def U2g (ucode)Begin " # {Iconv. Conv ('gbk', 'utf-8',

I have already introduced something about the ruby language. Next I will start to learn the rails platform that makes Ruby popular.The rails platform can build standard MVC applications. MVC is the controller, view, and model. The command for

The iterator is a feature of advanced languages and is very easy to use. For example, array Iteration[1, 2, 3]. Each {| n | puts N. to_s}(1. 100). Each {| n | puts N. to_s} iterates each element String Iteration"ABDC". each_byte {| CHR | printf "

Today I learned about the closure of Ruby. I mainly read the book "metapromgramming ruby: Http://book.douban.com/subject/4086938/ In chapter 3, the closed boss at the end of the closure is a question: write your first domain-specific language. event

I have been reading agile web development with rails over the past few days. Before reading a book, I thought of the following questions, which need to be found in the book: How to input validate, such as a required, number, date, range, and

Program: 1: formula (that is, code line, haha)2: Termination of the program Programs are composed of sub-statements. Use semicolons (;) or line breaks (;) to distinguish between formulas and formulas.In the middle of a row, separate them with

========================================================== ==========================================1. Can the methods in the Controller call each other?2. The @ variable defined in the control method is not an instance variable. It seems that it

/* * $ ID: Ruby. c 571 23: 32: 14z elliotth $ * copyright (c) 2000-2001, thaddeus covert * copyright (c) 2002 Matthias Veit * copyright (c) 2004 Elliott Hughes * this source code is released for free distribution under the terms of the *

Ruby standard type   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

The following pattern is commonly used to define method names in ruby. Def method_name (arg1, arg2) # Some codeend However, it is often seen in the code of books or other authors that=? !These three special weird symbols serve as the suffix of the

Refactoring (Ruby Version) Basic Information Original Title: refactoring: Ruby EditionOriginal Press: Addison-Wesley professionalAuthor: (US) Jay fields Jon Harvie Martin Fowler [Translator's introduction]Translator: Xu Xuming [same translator's

1. system method. System is followed by the command string of the System Shell to be executed as the parameter. This method allows the system program to run in a sub-shell. This is a conventional method for booting external programs in the system

Last week, I received a small Case to import some employee information to the database. I opened the Excel file in the email. The original file format is as follows: ID FirstName LastName123 Jerry Chou What I need to do is import the data to the

For example, you write a class named SendMail and put it in a file named send_mail.rb, If you attempt to reference this class in the same directory Require "send_mail" It's a waste of time, we need to add this paragraph $: This means that the