Solved

Lowest number in @numbers

Posted on 2000-03-09
7
260 Views
Last Modified: 2010-03-05
Hi!

There are numbers stored in the @numbers (for example - @numbers={2,4,1,6))

How do I search though the @numbers and look for the lowest avaible number (only whole numbers and no negtives) and assign the lowest number to $lowest.

So in this example, the number 3 would be stored in $lowest.

Thanks in advance!

Graeme Sandwell
0
Comment
Question by:graemesandwell
  • 2
  • 2
  • 2
  • +1
7 Comments
 
LVL 3

Expert Comment

by:guadalupe
ID: 2602232
#!/usr/local/bin/perl


$numbers[0] = 2;

$numbers[1] = 1;

@sorted_numbers = sort { $a <=> $b } @numbers;

print $sorted_numbers[0];  #this is the lowest

0
 

Author Comment

by:graemesandwell
ID: 2602271
Hi!

I tested the program (using @numbers=(2,4,1,6} and it just shows me the lowest number which is 1.  I need it to print the lowest AVAIABLE number (ie, the lowest number which isn't there).

Thanks!

Graeme
0
 
LVL 3

Accepted Solution

by:
guadalupe earned 200 total points
ID: 2602293
Ahhhhhhh  are we talking intergers?  Always greater than 0...?  A little more detail would help...

But try this it will give you the lowest integer greater than 0 which is not present..



#!/usr/local/bin/perl


$numbers[0] = 2;

$numbers[1] = 1;

@sorted_numbers = sort { $a <=> $b } @numbers;

#print $sorted_numbers[0];  #this is the lowest



$test = 1;

for $i (0..$#sorted_numbers)
{
      if ($test < $sorted_numbers[$i])
      {
            last;
      }
      else
      {
            ++$test;
      }
}
0
Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

 
LVL 84

Expert Comment

by:ozo
ID: 2603389
@numbers{@numbers} = ();
@available = grep{!exists$numbers{$_}}(1..(sort{$a<=>$b}@numbers)[-1]+1);
$lowest = @available[0];
0
 
LVL 5

Expert Comment

by:PC_User321
ID: 2603721
@numbers{@numbers} = ();
@available = grep{!exists $numbers{$_}}(1..($#numbers+2));
$lowest = $available[0];
0
 
LVL 5

Expert Comment

by:PC_User321
ID: 2603736
@numbers{@numbers} = ();
($lowest, $others) = grep {!exists $numbers{$_}}(1..$#numbers+2);
0
 

Author Comment

by:graemesandwell
ID: 2605628
Hi!

It worked.  Thanks a lot for everyones help!

Graeme Sandwell
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Email validation in proper way is  very important validation required in any web pages. This code is self explainable except that Regular Expression which I used for pattern matching. I originally published as a thread on my website : http://www…
Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
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…
As a trusted technology advisor to your customers you are likely getting the daily question of, ‘should I put this in the cloud?’ As customer demands for cloud services increases, companies will see a shift from traditional buying patterns to new…

910 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

18 Experts available now in Live!

Get 1:1 Help Now