Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Re: Bitwise Operator Error

by broomduster (Priest)
on Oct 02, 2008 at 18:49 UTC ( #715067=note: print w/ replies, xml ) Need Help??


in reply to Bitwise Operator Error

Your hexadecimal number in $testString needs to begin with 0x be properly interpreted as hexadecimal. Then it will work. You can also simplify your white-space removal. All together, here is one way to get where you want to go:

$testString =~ s/\s+//g;
$testString =~ s/^/0x/; $maskResult = $testString & 400000000000000000000000;
$maskResult = hex( $testString ) & 0x400000000000000000000000;

Updated: Need to use hex and need to have mask as hex string.

Updated 2: I see ikegami has also pointed out my error(s) corrected above.

Updated 3: and ikegami has also noted the need for Math::BigInt here.


Comment on Re: Bitwise Operator Error
Select or Download Code
Re^2: Bitwise Operator Error
by ravishi (Acolyte) on Oct 02, 2008 at 19:05 UTC
    Thanks for the help but I just tried what you suggested and it doesn't seem to work. It outputs a 0 which is correct but I get a warning saying that it isn't numeric. I then changed the first bit of the original string to an F to test if I get an output of 1, and I still get a 0.
Re^2: Bitwise Operator Error
by ikegami (Pope) on Oct 02, 2008 at 19:18 UTC

    That's wrong.

    >perl -we"print 0+'0x0001'" Argument "0x0001" isn't numeric in addition (+) at -e line 1. 0

    See my reply to the OP for details

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://715067]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others examining the Monastery: (8)
As of 2015-07-06 10:52 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (72 votes), past polls