?
Solved

Algorithm

Posted on 1998-09-04
4
Medium Priority
?
200 Views
Last Modified: 2010-03-05
I am looking for an algorithm that will allow you to add up squares and determine the individuals.  OK...that doesn't make much sense.  Here's an example.  There are 4 options.  The values to the options are 1, 2, 4, and 8 respectively.  If the total of the options is 14, what routine would let me know that the 2nd, 3rd, and 4th option were picked?
0
Comment
Question by:IsleOfView
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
4 Comments
 
LVL 84

Expert Comment

by:ozo
ID: 1204693
$_ = unpack'b*',pack'V',14;
print pos,"\n"  while( /1/g );
0
 

Author Comment

by:IsleOfView
ID: 1204694
That works perfectly.  (I think I need to hit the books to understand the syntax, though) :)

Please choose answer so I can give the points.
0
 
LVL 84

Accepted Solution

by:
ozo earned 40 total points
ID: 1204695
$_ = unpack'b*',pack'V',14;
print pos,"\n"  while( /1/g );
#or
for( 1..4 ){ print if $_&14 }
0
 
LVL 84

Expert Comment

by:ozo
ID: 1204696
#sorry, that second one should have been
for( 1..4 ){ print if 1<<$_-1 & 14 }
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I've just discovered very important differences between Windows an Unix formats in Perl,at least 5.xx.. MOST IMPORTANT: Use Unix file format while saving Your script. otherwise it will have ^M s or smth likely weird in the EOL, Then DO NOT use m…
On Microsoft Windows, if  when you click or type the name of a .pl file, you get an error "is not recognized as an internal or external command, operable program or batch file", then this means you do not have the .pl file extension associated with …
Explain concepts important to validation of email addresses with regular expressions. Applies to most languages/tools that uses regular expressions. Consider email address RFCs: Look at HTML5 form input element (with type=email) regex pattern: T…
Six Sigma Control Plans

741 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question