From: "rits (First Last)" <redmine@...>
Date: 2013-11-25T05:11:44+09:00
Subject: [ruby-core:58553] [ruby-trunk - Feature #7511] short-circuiting	logical implication operator


Issue #7511 has been updated by rits (First Last).


mame (Yusuke Endoh) wrote:
> Please show a more concrete example.
> 

logical implication is a core operation of boolean algebra, do you also need concrete examples for || ?

ok if you insist, lets say your code needs to perform some optional work but successfully, i.e. the existence of the method must imply it's successful execution.

required_work && respond_to?(optional_work) => send(optional_work)




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Feature #7511: short-circuiting logical implication operator
https://bugs.ruby-lang.org/issues/7511#change-43131

Author: rits (First Last)
Status: Assigned
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: Next Major


I find I need logical implication (will use => here) in boolean expressions fairly often

and even though a => b is equivalent to !a || b, this substitute is more difficult to read and make sense of in long expressions




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