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Pastable version of group objects in array

<pre class='prettyprint' language='ruby'>grouped = [] arr = [#&lt;Foo id: 1, status_id: 2, profile_id: 3&gt;,#&lt;Foo id: 2, status_id: 2, profile_id: 3&gt;,#&lt;Foo id: 3, status_id: 1, profile_id: 3&gt;] arr_copy = arr arr.each do |a| grouped &lt;&lt; arr_copy.select do |copy| (copy.status_id == arr.status_id) &amp;&amp; (copy.profile_id == arr.profile_id) &amp;&amp; end end # necessary to eliminate dupes final_group = grouped.uniq # end result # [[#&lt;Foo id: 1, status_id: 2, profile_id: 3&gt;,#&lt;Foo id: 2, status_id: 2, profile_id: 3&gt;],[#&lt;Foo id: 3, status_id: 1, profile_id: 3&gt;]]</pre> <a href="http://www.refactormycode.com/codes/1244-group-objects-in-array" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://www.refactormycode.com/images/small_logo.gif" style="border:0" /></a>