Solved

Algorithm

Posted on 1998-09-04
4
186 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
  • 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 10 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

What Is Threat Intelligence?

Threat intelligence is often discussed, but rarely understood. Starting with a precise definition, along with clear business goals, is essential.

Join & Write a Comment

Suggested Solutions

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…
Many time we need to work with multiple files all together. If its windows system then we can use some GUI based editor to accomplish our task. But what if you are on putty or have only CLI(Command Line Interface) as an option to  edit your files. I…
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…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

708 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

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now