From: Joel Pearson <lists@...>
Date: 2013-01-06T01:25:24+09:00
Subject: Re: Best practice for &&, ||, and, or

Well, you might already be familiar with this, but this is what I use:

"Use &&/|| for boolean expressions, and/or for control flow. (Rule of 
thumb: If you have to use outer parentheses, you are using the wrong 
operators.)"

Excerpt from: https://github.com/bbatsov/ruby-style-guide

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