Ruby for Rails phần 4 pptx

... system): Loading object 942 912 Loading object 942 892 Loading object 942 882 The first suitcase off the plane is 942 882 The cargo hold example shows how you can use an existing module for a new class. ... your Ruby programs. Sure enough, Ruby gives you a full suite of programming techniques for creat- ing objects on a batch or factory basis. You don’t have to define a separate pri...

Ngày tải lên: 06/08/2014, 09:20

... Francisco Bay, CA-USA 42 8 1.63 366 Macau, Brazil 44 7 1. 74 392 Great Salt Lake, UT-USA 48 6 2 .42 541 Shark Bay, Australia 45 8 2 .47 576 Chaplin Lake, Canada 47 5 2. 04 448 Tanggu, Bohai Bay, ... production. 4. 1.2. Biology and ecology of Artemia 4. 1.2.1. Morphology and life cycle 4. 1.2.2. Ecology and natural distribution 4. 1.2.3. Taxonomy 4. 1.2 .4. Strain-specific c...

Ngày tải lên: 15/12/2013, 00:15

Ngày tải lên: 23/07/2014, 19:21

... bottom of the screen, and icons for folders and applications appear directly on the desktop. 74 Part II: Test-Driving SUSE 10_7 549 35 ch05.qxp 11/7/05 9:52 PM Page 74 For the Trash icon, the icon ... alphabetically by name. 84 Part II: Test-Driving SUSE 11_7 549 35 ch06.qxp 11/7/05 9:50 PM Page 84 If you want to keep up with KDE news, you can always find out the latest informatio...

Ngày tải lên: 23/07/2014, 23:20

... 85 The irb-based Rails application console 89 3 .4 Summary 90 Ruby for Rails RUBY TECHNIQUES FOR RAILS DEVELOPERS DAVID A. BLACK MANNING Greenwich ( 74 w. long.) vii PART ITHE RUBY/ RAILS LANDSCAPE ... views 42 2 17 ■ Techniques for exploring the Rails source code 45 5 appendix ■ Ruby and Rails installation and resources 47 1 xii CONTENTS 5.6 Inheritance 148 I...

Ngày tải lên: 06/08/2014, 09:20

... extension (require it) ruby -rprofile version Show Ruby version information ruby version A Rails application walk-through 45 Initializing the databases To create the database for the application, ... in Ruby and shipped with Ruby) , lightTPD CGI Library CGI data processing routines Parses incoming form data Part of the Ruby standard library ERb "Embedded Ruby& quot; Te...

Ngày tải lên: 06/08/2014, 09:20

... object)" end Figure 4. 1 Anatomy of a method definition 72 CHAPTER 3 Ruby- informed Rails development because of Ruby (Ruby doesn’t care), but because leaving the parentheses off is a standard Rails convention. ... an infrastructure for doing so (helper methods and predefined hooks) and in cases where you’re writing methods from D E B C D E 74 CHAPTER 3 Ruby- informed Rail...

Ngày tải lên: 06/08/2014, 09:20

... inside a singleton method of mine: #<Object:0x40193d40> And inspecting obj from outside, to be sure it's the same object: #<Object:0x40193d40> (As always, the exact hexadecimal number ... exceptions 225 8 .4 Error handling and exceptions Way back in chapter 1, we looked at how to test code for syntax errors: $ ruby -cw filename.rb Passing the -cw test means Ruby can...

Ngày tải lên: 06/08/2014, 09:20

... the ASCII values for “a” and “A” are 97 and 65, respectively. Similarly, the string “.” is greater than “,” because the ASCII value for a period is 46 and that for a comma is 44 . At this point, ... huge roles in Ruby and Rails. Some of the founda- tional Ruby libraries upon which Rails is built use hashes to pass data around; in particular, the Ruby CGI library makes you...

Ngày tải lên: 06/08/2014, 09:20

... two. We’re going to look next at techniques for converting back and forth from one to the other, and reasons you may want to perform such conversions. 12 .4. 4 Converting strings and regular expressions ... "b", "y"] Another common use case for split is performing a conversion from a flat, text- based configuration file to a Ruby data format—array, hash, or someth...

Ngày tải lên: 06/08/2014, 09:20