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    <p>If you create a new model you can make it inherit the methods from an existing class.</p> <p>Example (app/models/mykindofstring.rb):</p> <pre><code>class Mykindofstring &lt; String def all_caps_and_reverse self.upcase.reverse end end </code></pre> <p>Then from the controller:</p> <pre><code>@my_string = Mykindofstring.new('This is my string') </code></pre> <p>and finally calling it from the view:</p> <pre><code>&lt;%= @my_string %&gt; </code></pre> <p>displays as This is my string, while:</p> <pre><code>&lt;%= @my_string.all_caps_and_reverse %&gt; </code></pre> <p>displays as GNIRTS YM SI SIHT.</p> <p>The class inherits from the string class, so all the methods that apply to a string also apply to a mykindofstring object. The method in it is just a new name for a combination of two existing string methods, but you can make it do whatever you want, such as a method to convert a time into a formatted string.</p> <p>Basically it's just extending a current Ruby class with your own methods instead of using functions/helpers.</p> <p><strong>Major Edit</strong></p> <p>Based on Ians comment to this answer and his own answer to the above question, I played around a bit in Rails and came up with adding this to the application_helper.rb:</p> <pre><code>module ApplicationHelper String.class_eval do def all_caps_and_reverse self.upcase.reverse end end end </code></pre> <p>Now just call the method on any string in the app:</p> <pre><code>@string = 'This is a string.' @string.all_caps_and_reverse </code></pre> <p>.gnirts a si sihT</p>
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    1. POHow can I make rails helpers more object-oriented
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    1. POHow can I make rails helpers more object-oriented
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    1. COBut it's Ruby! Subclassing is "proper" OO, but you don't want to create new objects of another type, you want to use actual God-given strings, so just open up the String class and add your method: class String; def all_caps_and_reverse; self.upcase.reverse; end; end
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      1. USIan Terrell
    2. COThanks, good point. I revised the answer accordingly. Btw, this is why I like Stack Overflow; I've only been here a few days and my code is already improving.
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    3. COWhy do it with class_eval rather than just redeclaring the string class?
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      1. USTom Lehman
 

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