book of ruby

One of the coolest features of Ruby is to extend it using the Application programming interface (API) defined by C + + +. Ruby provides the C header file Ruby.h, which comes with a number of features that you can use to create Ruby classes, modules, and more. In addition to the header file, Ruby offers several other hi

Ruby is filled with a series of hidden variables. We can get some interesting information from these predefined global variables. Global process variable $ Indicates the currently running ruby process.Copy codeThe Code is as follows: >>$ $=> 17170We can kill ourselves from the current process.Copy codeThe Code is as follows:> 'Kill-9 # {$ $ }'[1] 17170 killed irb$? Indicates the status of the latest sub-pro

Transferred from: http://www.jb51.net/article/48802.htmRuby is filled with a series of hidden variables, and we can get some interesting information from these pre-defined global variables. Global process variables$$ represents the currently running Ruby process.>> $$= 17170We can kill it ourselves from the current process.>> ' kill-9 #{$$} '[1] 17170 killed IRB$? Represents the state of a recent child process>> ' echo Hello '= "Hello\n">> $?= = #>> $

Use C ++ to compile Ruby program extension tutorials. One of Ruby's coolest features is to extend it using the application programming interface (API) defined in C/C ++. Ruby provides the C header file ruby. h, which is accompanied by many features that can be used to create Ruby classes, modules, and more. In addition

[Special statement] This article is purely my personal behavior. It is totally out of my preferences and has nothing to do with Turing. However, it should be noted that writing this book review is entirely from the whim. Although I want to maintain neutral, I am a publisher, and the service provider can be said to be a competitor of the publishing house. Therefore, it is not a suitable reviewer, please pay special attention to this when reading the f

Introduction, in fact, this call is not required to charge is free phone, but the need for traffic costs, this is not a micro-letter phone book collection and your operator to collect your money, Micro-letter Phone book in the 2G/3G/4G Network for a minute to consume about 300K of traffic; less than 1k/hours are consumed during the time; After successful registration, the first automatic backup of the cont

that the "goal-oriented" interactive design method advocated by the author is effective in solving the problem of "difficult to use", and confirms that only by changing the existing concept can we effectively introduce interactive design into the development process and lead the product design to success. This book is a book for business people, but it is also suitable for all professionals involved in the

IOS customs clearance book, Android can be imported, ios customs clearance book android 12 books, iOS, Swift, and Objective-C classic, and UI and security. 1. iOS development guide: from basic to App Store (version 3rd) (best-selling new iOS book) Author: Guan DongshengBook No.: 978-7-115-38776-9Pricing: 99.00 RMBStart: 16Page: 452 Swift and Objective-C bilingu

Address: http://calibre-ebook.com/user_manual/conversion.html#convert-microsoft-word-documents The calibre conversion system is designed to be very easy to use. Generally, you only need to add a book to calibre and click convert. calibre will generate output as close as possible to the input. However, calibre accepts many input formats, but not all of them are suitable for conversion to other formats of e-books. In this case, for these input formats

accepts ruby more easily than Java. This is not the case. In November 11, Don box mentioned Bruce Tate's new book, beyond Java, in his blog. The whole article is about Ruby surpassing Java. Although don box does not directly praise Ruby in the text, it is still a slap in the face of

Operating System Experiment Instruction book Computer College of Yantai University Operating System Course Group 2008-9-20 the first part of the operating system on the computer guidance Linux Operating system environment:RedHat Enterprise Linux ES Release 3 (Taroon Update 1) (2.4.21-9.el) Red Flag Linux Release 4.0 (Hot) (2.4) log on to the system Common Command Exercises : Register with Root account (Superuse

Ruby is filled with a series of hidden variables, and we can get some interesting information from these predefined global variables. Global process variables $$ represents the currently running Ruby process. Copy Code code as follows: >> $$ => 17170 We can kill ourselves from the current process. Copy Code code as follows: >> ' kill-9 #{$$} ' [1] 17170 killed IRB $

Delete all file methods in your address book at once: 1, the iphone connected to the PC 2. Open itunes 3, above: "Summary"/Information/"Application"/"ringtones"/... In that column, click the "Info" bar. 4, point into the "Information" column, in the "Sync Address Book and Outlook" in the front of the options bar, usually hit the "small Right hook", click Cancel "small pair hook" 5. The System pop-up di

The interface for accessing the address book and a single contact data is a C-language function that transmits references to various objects in the address book as parameters. The base class object for managing entries in the address book is abrecord. An abrecord can represent a person or a group of abgroups. Whenever you select a record on the interface or use t

IOS-Address Book, ios Address Book Development1. Overview: * For every mobile device, there is a built-in database ----- address book. * On IOS, the address book is stored in the SQLite3 database. * Because different applications cannot access the database directly, you must use the APIS opened by Apple to access the d

New year to new language which is more suitable? Experience with PHP and C # Reply content:So many python?!. I recommend Ruby Bar, Blossom, hehe ~ and Ruby's meta-programming ability is stronger, it may be more interesting to write-your colleague's work will use Python or ruby? If so, then what they learn with what, later good rejoined. in PHP and C #, your work may be related to the front desk page and th

Write in frontThanks to all the friends who came in to see. Yes, I'm currently going to write a book about unity shader.The purpose of the book is to have the following several: Summarize my experience with unity Shader and give others a reference. I am very aware of the difficulties of learning shader, and I have seen many questions raised by people in the group. I think learning shader is still a

" These two sets of code really look like a super image. I think this also exposes the essence of Ruby block: A variant of function parameters of higher-order functions. The map function in JavaScript accepts a function as a parameter, but the map in Ruby acceptsBlock as a parameter. In fact, matz mentioned the following in a book: Copy codeThe Code is as follows

Instance Onetoday you come to work as usual and start your programming work as always.The project manager tells you that today you want to add a new feature to the server, and you want to write a method that handles the book object, wrapping all the fields of the book object in XML format so that you can easily interact with the client later. and print the log before and after the start of the package so th

So which of the three ages is the best to use on your project? That depends a great deal on what you want to accomplish. to wrap up the book, I 've outlined some of the pros and cons of each language in this section. which of the three languages is more suitable for your project? It depends largely on what you want to achieve. At the end of this book, I will describe their respective advantages and disadvan