Ruby for Rails phần 3 pps

... CHAPTER 3 Ruby- informed Rails development because of Ruby (Ruby doesn’t care), but because leaving the parentheses off is a standard Rails convention. The common idioms you use in Rails aren’t ... (descending). 3 If the sort field is number, sort by RCR number (descending). The Ruby method that does this—the rcr/all action, in rcr_controller.rb —is as follows: 90 CHAPTER...

Ngày tải lên: 06/08/2014, 09:20

... 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 1 1 ■ How Ruby works 3 2 ■ How Rails ... regexp-based string operations 31 2 13 ■ Ruby dynamics 33 7 PART IV RAILS THROUGH RUBY, RRRRRRRRIRUBY THROUGH RAILS 36 9 14 ■ (Re)modeling the R4RMusic applicati...

Ngày tải lên: 06/08/2014, 09:20

... 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; Templating system for ... 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 fo...

Ngày tải lên: 06/08/2014, 09:20

... the model and its associated entities for a next level of information. This information, in turn, might be used for in-house reports, richer on-screen information displays, or sales profiling. ... cosmetic. The consistent “Rubyness” of a Rails application makes for a consistent development experience: It’s easier to think in Ruby the whole time than it is to switch back and forth. (...

Ngày tải lên: 06/08/2014, 09:20

... constructors 234 – 235 cannot be redefined 237 colon (for symbol) 235 curly braces (for hashes) 235 ellipsis (for ranges) 235 for arrays ([]) 235 , 279 for regular expressions (//) 31 5 forward slashes (for ... 32 7 abbreviations for common character classes 31 8 anchors 32 6 32 8 and Enumerable#grep 33 4 and String#gsub 33 4 and String#sub 33 3 as arguments to built-in...

Ngày tải lên: 06/08/2014, 09:20

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Ngày tải lên: 23/07/2014, 19:21

... see the following: We've created two tickets. The first is for a Town Hall event on 11/12/ 13. The second is for an event on 12/ 13/ 14 at Convention Center. The phrase “at Convention Center” ... inheritance bones. 5.6.1 Inheritance and Rails engineering Inheritance is one of the key organizational techniques for Rails program design and the design of the Rails framework. Y...

Ngày tải lên: 06/08/2014, 09:20

... snippet informs us: Here's the inspect-string for 'self':#<C:0x40193c3c> And I'm a different variable called 'a' each time! Here's the inspect-string for 'self':#<C:0x40193c3c> And ... use an absolute path for a file. This may happen if you create a class or module with a name that’s similar to the name of a Ruby built-in clas...

Ngày tải lên: 06/08/2014, 09:20

... division 10 /3 3 Integer division (no automatic floating-point conversion) 10.0 /3. 0 3. 333 333 333 3 Floating-point division 1.2 + 3. 4 4.6 Floating-point addition -12 - -7 -5 Subtraction 10 % 3 1 Modulo ... base from 2 to 36 , inclusive. Here are some examples: >> "10".to_i(17) => 17 >> "1 234 5".to_i( 13) => 33 519 >> " ;ruby& quot;...

Ngày tải lên: 06/08/2014, 09:20