From: Gary Wright <gwtmp01@...>
Date: 2008-01-10T05:29:57+09:00
Subject: Re: Question about Hex => Signed Int


On Jan 9, 2008, at 2:48 PM, Tim Conner wrote:

> Hello,
> Is there a ruby function to convert the following hexadecimal numbers
> into the corresponding signed integers or will i need to write  
> something
> to do the conversion?  Sorry if this question is stupid but i'm pretty
> new to all this.
>
> 0xFF467A7B  =>  -12158341
> 0x38CFEF    =>  3723247

The tricky part is dealing with the twos compliment notation but  
String#to_i will do the hex/decimal conversion:

 >> "0xFF467A7B".to_i(16) - 0x100000000
=> -12158341

 >> "0x38CFEF".to_i(16)
=> 3723247

Gary Wright