From: "Xavier R." <lists@...>
Date: 2013-02-23T05:45:35+09:00
Subject: Re: Not able to understand the difference between "||=" and "|=".

Huum,, Interesting from the below code I got the taste :

>> a = [2,3,4]
=> [2, 3, 4]
>> a||=[2,1,4,6]
>> b ||= [2,33]
=> [2, 33]
>> b ||= [21,33]
=> [2, 33]

From the above code it is clear that "||=" operators set the variable 
conditionally. Condition is like that if the variable is set to "false 
or nil" then set it or return it's already set value.

=> [2, 3, 4]
>> a |= [2,1,4,6]
=> [2, 3, 4, 1, 6]
>> a = [1,2,3]
=> [1, 2, 3]
>> a |= [4,5]
=> [1, 2, 3, 4, 5]
>> a |= [4,5,6]
=> [1, 2, 3, 4, 5, 6]
>>

From the above code I can say that "|=" operator performing kind of 
concatenation and if delicates then remove it away.

If any wrong logic I said here, forgive me and correct me please.

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