The latest articles on Forem by AW Unad (@awcodify). https://forem.com/awcodify https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto,format=auto/https:%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F117321%2F6f0269e5-fea6-4ec6-b367-32d39bce3f35.png https://forem.com/awcodify en AW Unad Fri, 28 Dec 2018 10:51:22 +0000 https://forem.com/awcodify/why-instancevariable-in-ruby-is-mutable-512a https://forem.com/awcodify/why-instancevariable-in-ruby-is-mutable-512a <div class="highlight"><pre class="highlight plaintext"><code> class User def initialize(attr) @attr = attr end def add_name @attr[:name] = 'Foo Bar' @attr end end user = {} User.new(user).add_name user =&gt; {:name=&gt;"Foo Bar"} </code></pre></div> ruby discuss