Ruby for Rails phần 1 pps

... 306 11 .5 Sorting collections 307 Sorting and the Comparable module 309 Defining sort order in a block 310 11 .6 Summary 311 12 Regular expressionsand regexp-basedstring operations 312 12 .1 What ... 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/...

Ngày tải lên: 06/08/2014, 09:20

... NULL AUTO_INCREMENT, composer_id INT (11 ), title VARCHAR (10 0), PRIMARY KEY (id) ); CREATE TABLE editions ( id INT (11 ) NOT NULL AUTO_INCREMENT, work_id INT (11 ) NOT NULL, description VARCHAR(30), ... 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; Tem...

Ngày tải lên: 06/08/2014, 09:20

... obj.one_arg(x) end obj.one_arg (1, 2,3) results in: ArgumentError: wrong number of arguments (3 for 1) B B The innate behaviors of an object 11 1 You can determine in advance (before you ask the object ... 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 parenthes...

Ngày tải lên: 06/08/2014, 09:20

... class: PERIODS = { [16 50 17 50, %w{ EN DE FR IT ES NL}] => "Baroque", dddddddddddd [17 51 1 810 , %w{ EN IT DE NL }] => "Classical", dddddddddddd [17 51 1830, %w{ FR }] => ... provisions for that person to log in. 16 .4 .1 The login and signup partial templates The main welcome view template, shown in listing 16 .9, performs a rendering of partials for...

Ngày tải lên: 06/08/2014, 09:20

... method calls 234 references 10 9, 11 8 and changing objects 11 8 as quasi-pointers 11 8 assigned from one variable to another 11 7 stored in variables 11 7 11 8 reflection 11 1 filtering method lists with ... method, for incremental accumulation of results 417 input file 11 14 gets 6, 11 keyboard 11 14 instance methods 12 3, 15 6 Array#unshift 4 61 notation for referri...

Ngày tải lên: 06/08/2014, 09:20

... Management 11 Curriculum for 5-year-olds 12 Units 13 My Body 13 Animals 14 School 15 The Weather 16 Transport 17 The House 18 The Family 19 Food 20 ... the same or similar license to this one. Fun English for Kids Fiona L Cooper 5 Advice for Advice for Advice for Advice for teach teachteach teaching inging ing Engli...

Ngày tải lên: 24/07/2014, 13:21

... Hall"," ;11 /12 /13 ") cc = Ticket.new("Convention Center"," ;12 /13 /14 /") fg = Ticket.new("Fairgrounds", " ;13 /14 /15 /") th.price = 12 .55 cc.price = 10 .00 fg.price ... 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 Cen...

Ngày tải lên: 06/08/2014, 09:20

... exceptions in action, try dividing by zero: $ ruby -e &apos ;1/ 0' Ruby raises an exception: -e :1: in `/': divided by 0 (ZeroDivisionError) from -e :1 ZeroDivisionError is the name of this ... snippet informs us: Here's the inspect-string for 'self':#<C:0x4 019 3c3c> And I'm a different variable called 'a' each time! Here's the insp...

Ngày tải lên: 06/08/2014, 09:20

... " ;10 ".to_i (17 ) => 17 >> " ;12 345".to_i (13 ) => 33 519 >> " ;ruby& quot;.to_i(35) => 11 94794 Keep in mind that most of the arithmetic operators you see in Ruby ... eight): >> 012 => 10 >> 012 + 12 => 22 >> 012 + 0x12 => 28 You can also use the to_i method of strings to convert numbers in any base to decim...

Ngày tải lên: 06/08/2014, 09:20

... tests for. Table 11 .2 Common hash query methods and their meanings Method name/sample call Meaning h.has_key? (1) True if h has the key 1 h.include? (1) Synonym for has_key? h.key? (1) Synonym for ... output of listing 12 .1: The whole string we started with: My phone number is (12 3) 555 -12 34. The entire part of the string that matched: (12 3) 555 -12 34 The three capture...

Ngày tải lên: 06/08/2014, 09:20