Re: decode hex string

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From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups	comp.lang.javascript
Subject	Re: decode hex string
Date	Fri, 05 Aug 2016 08:06:41 +0200
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Thomas 'PointedEars' Lahn wrote:

> Andrew Poulos wrote:
>> I have some code I need to edit and the previous programmer has used
>> variable names like _0x29aexe, _0x29aexf, _0x29aex10, _0x29aex11,
>> _0x29aex12, _0x29aex13, _0x29aex14, _0x29aex15...
>> 
>> My guess was that it's hex with a leading underscore but when I convert
>> I get "?)®?" and the like.
>> 
>> Did I convert it wrongly or did the person obfuscate the variable names
>> even further?
> 
> Impossible to say for certain without seeing the source codes (theirs and
> yours).
> 
> However, hexadecimal numbers do not contain the letter “x”, so if you used
> parseInt(…, 16) on anything but the “_”, then you converted it wrongly;
> parseInt(…, 16) would recognize and ignore the “0x” as a hexadecimal
> number
> prefix, but it would stop parsing before the second “x”.  But
> String.fromCharCode(parseInt("0x29aexfoo", 16)) returns "⦮", not "?", so
> you might not have attempted to convert them this way.

You have probably attempted to convert the number as octets: 
String.fromCharCode(0x29, 0xAE) returns ")®".
 
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PointedEars
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decode hex string Andrew Poulos <ap_prog@hotmail.com> - 2016-08-05 10:19 +1000
  Re: decode hex string $Bill <news@todbe.com> - 2016-08-04 21:28 -0700
  Re: decode hex string Andreas Bergmaier <andber93@web.de> - 2016-08-05 06:44 +0200
  Re: decode hex string Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-05 07:53 +0200
    Re: decode hex string Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2016-08-05 08:06 +0200

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