From: Robert Klemme <shortcutter@...>
Date: 2009-01-13T16:24:15+09:00
Subject: Re: XOR two binary strings

On 12.01.2009 20:52, Joel VanderWerf wrote:
> Gary Chris wrote:
>> Howdy,
>>
>> I am having difficulty finding how to XOR 2 binary strings.
>> Is there a builtin function for this ?
>> Something like
>> return string_one ^ string_two
>>
>> Thanks
> 
> All I can think of at the moment:
> 
> a = [0b00000001, 0b00001000].pack("C*")
> b = [0b10000001, 0b01000000].pack("C*")
> 
> c = a.unpack("C*").zip(b.unpack("C*"))
> c = c.map {|x,y| x^y}
> c = c.pack("C*")
> p c

There's also

irb(main):002:0> ("00000001".to_i(2) ^ "0110".to_i(2)).to_s(2)
=> "111"

Kind regards

	robert


-- 
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