Difference between revisions of "Ruby on Rails"

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http://www.ruby-lang.org/en/documentation/quickstart/<br>
 
http://www.ruby-lang.org/en/documentation/quickstart/<br>
  
--nil? empty? and blank?--
+
<h3>nil? empty? and blank?</h3>
 
.nil? can be used on any object and is true if the object is nil.
 
.nil? can be used on any object and is true if the object is nil.
  

Revision as of 18:07, 16 September 2013

Beginner's tutorial
http://allaboutruby.wordpress.com/2006/01/09/installing-rails-on-windows-step-by-step-tutorial/
Ruby in 20 minutes
http://www.ruby-lang.org/en/documentation/quickstart/

nil? empty? and blank?

.nil? can be used on any object and is true if the object is nil.

.empty? can be used on strings, arrays and hashes and returns true if:

String length == 0 Array length == 0 Hash length == 0