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POInconsistency about ruby 'main' object
 

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  1. POInconsistency about ruby 'main' object
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    <p>Ruby is pretty consistent about classes and objects. However, when it comes to top-level method declaration, that rule somehow breaks down. For example, </p> <pre><code>$ puts self # =&gt; main $ puts self.class # =&gt; Object </code></pre> <p>However, the methods declared in the context of this <code>main</code> object are somehow available as private methods of class <code>Object</code>.</p> <p>Is there any logical explanation for this? I understand that this is very convenient as these methods appear as "stand-alone functions", but taking it just as "it just is so" breaks the otherwise consistent rules, as normally you have to define a method in the context of a class for it to be a method of that class. However, the <code>main</code> object is not class <code>Object</code>, nor is it a class at all.</p> <p><strong>Re-framing my question:</strong> In what scope does the method gets declared inside ruby's REPL? {class Object/ object main or module Kernel}</p> <p>Regarding private nature of methods declared in REPL, plz see the following example:</p> <pre><code>def my_method # "a method declared in REPL" puts "method called" end # calling my_method in REPL aka top-level scope my_method # =&gt; "method called" [].my_method # =&gt; private method `my_method' called for []:Array (NoMethodError) Array.my_method # =&gt; private method `my_method' called for Array:Class (NoMethodError) </code></pre> <p>Q: If my_method is defined as a private method under class Object, then why is self set to main instead of class Object. If someone says that its not under private scope, then why am I getting above mentioned error?</p>
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    1. CO[What is the Ruby Top-Level?](http://banisterfiend.wordpress.com/2010/11/23/what-is-the-ruby-top-level/)
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    2. COI've updated my response to include your sample code and it's result in 1.9.3
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      1. USFederico Builes
 

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