Solved

I need to get some code to concat string

Posted on 2008-10-02
3
550 Views
Last Modified: 2012-05-05
      my $message;
      for ($i = 0 ; $i  <= $#param ; $i++ )
      {
            print $param[$i], "\n";
            $message = join ( $message, $param[$i]);
      }
print $message, "\n";

I am novice in perl. Here is my problem. the print line prints every part of the array
$message prints the last string in the array!

Why! How to fix it! please. I want solution before I get to work tomorrow!
0
Comment
Question by:EmadGirgis
  • 2
3 Comments
 

Author Comment

by:EmadGirgis
ID: 22631187
I guess I found the answer.

It is


Print @param

Am I right
0
 
LVL 84

Expert Comment

by:ozo
ID: 22631599
perldoc -f join
       join EXPR,LIST
               Joins the separate strings of LIST into a single string with
               fields separated by the value of EXPR, and returns that new
               string.  Example:

                   $rec = join(':', $login,$passwd,$uid,$gid,$gcos,$home,$shell);

               Beware that unlike "split", "join" doesn't take a pattern as
               its first argument.  Compare "split".



so,
 $message = join ( "",$message, $param[$i]);
might do what you want, although
 $message = $message . $param[$i];
or
 $message .= $param[$i];
would be simpler
Also,
  $message = join ( "",@param );
or
 $message = join ( "\n",@param );
 print $message;
will join all the elements of @param


0
 
LVL 84

Accepted Solution

by:
ozo earned 500 total points
ID: 22631606
> Print @param;
should be
print @param;
0

Featured Post

Courses: Start Training Online With Pros, Today

Brush up on the basics or master the advanced techniques required to earn essential industry certifications, with Courses. Enroll in a course and start learning today. Training topics range from Android App Dev to the Xen Virtualization Platform.

Question has a verified solution.

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

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 …
A year or so back I was asked to have a play with MongoDB; within half an hour I had downloaded (http://www.mongodb.org/downloads),  installed and started the daemon, and had a console window open. After an hour or two of playing at the command …
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…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

785 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