hi monks,
I have a file with data like this:

id_1 info1
id_2 info2
id_3 info3

id_1 info1
id_2 info2
id_3 info3
and all I want to do is use a hash to put this into arrays eg: id_1 all the info with this id here...
so id is my key.
Here's the code:
while (<MYFILE>)
{
       {        
                
        next if /^\s*CLUSTAL/;      #remove line starting with CLUSTAL
+ heading
        next if /:/;        #skip the consensus lines which contain : 
+and *
        next if /\*/;    
        next if /^ /;
       

        my($id, $seq) = split;                   #splits each line to 
+id and sequence
        $newid = substr ($id, 0, 9);
       
                                    #remove all but 9 characters from 
+id
                                #so the id's are all the same length
        
        push @{$species{$newid}}, $seq;               #each time adds 
+sequence to   
                                  #a unique id and puts sequence in an
+ array (hash is %species)
    }   
                                


}
while (($key, $sequence)=each %species)
    {
    
        
        print DATA ">", $key, " ", join " ", @$sequence;    #\t to sep
+arate with tab
        print DATA "\n";
        
    }

close(MYFILE);
close(DATA);

[download]
the problem is, I seem to get a blank record printed out at
the top of the page - I am adding the symbol > to the front of each id

what I get in my DATA file is

>
>id1 info
>id2 info

any idea why I get this blank record printed first?
thanks

In reply to hash printing - why a blank record ? by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.