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POTime.now does not match the same Time as generated from Time.parse or Time.at
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  1. POTime.now does not match the same Time as generated from Time.parse or Time.at
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    copied!<p>While testing some Ruby code, I ran into some strange behavior. Can someone please explain why <code>Time.now</code> doesn't match the same time created from either <code>Time.at</code> or parsed from <code>Time.parse</code>?</p> <pre class="lang-rb prettyprint-override"><code>[1] pry(main)&gt; require 'time' =&gt; true [2] pry(main)&gt; t = Time.now =&gt; 2013-04-04 19:46:49 -0400 [3] pry(main)&gt; i = Time.at t.to_i =&gt; 2013-04-04 19:46:49 -0400 [4] pry(main)&gt; t == i =&gt; false [5] pry(main)&gt; t.to_i == i.to_i =&gt; true [6] pry(main)&gt; p = Time.parse t.to_s =&gt; 2013-04-04 19:46:49 -0400 [7] pry(main)&gt; t == p =&gt; false [8] pry(main)&gt; t.to_i == p.to_i =&gt; true [8] pry(main)&gt; t.class =&gt; Time [9] pry(main)&gt; i.class =&gt; Time [10] pry(main)&gt; p.class =&gt; Time [11] pry(main)&gt; t.inspect =&gt; "2013-04-04 19:46:49 -0400" [12] pry(main)&gt; i.inspect =&gt; "2013-04-04 19:46:49 -0400" [13] pry(main)&gt; p.inspect =&gt; "2013-04-04 19:46:49 -0400" </code></pre> <h2>Update 1</h2> <p>It seems even trying to get sub-second precision shows the same behavior:</p> <pre class="lang-rb prettyprint-override"><code>[1] pry(main)&gt; t = Time.now =&gt; 2013-04-04 20:04:47 -0400 [2] pry(main)&gt; f = Time.at t.to_f =&gt; 2013-04-04 20:04:47 -0400 [3] pry(main)&gt; t == f =&gt; false [4] pry(main)&gt; t.to_f =&gt; 1365120287.902954 [5] pry(main)&gt; f.to_f =&gt; 1365120287.902954 </code></pre>
 

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