On 24 June 2013 20:59, Colin Law <[email protected]> wrote:
> On 24 June 2013 17:49, John Merlino <[email protected]> wrote:
>> I have two hex values and expect back the value "3007"
>>
>>
>> What pack does is take the array of hexes and formats them into a string (if
>> ASCII representation, then ASCII character, otherwise the raw hex as
>> string). Then I take the string of hexes and unpack them, that is, get the
>> unsigned int representation of those bytes:
>> [0xBF, 0xB].pack('C*').unpack('I')[0]
>>
>> So I expect back 3007, but the above produces nil.
>
> Do the operation one step at a time in irb and you will see where it goes
> wrong.
Hint: unpack('I') appears to expect four bytes.
Colin
>
> Colin
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