Hi, 
I have a long html text. For this text I want to get all database
Identifiers (4 letters, beginning with a digit (not 0)) e.g 1TGS
These IDs are introduced by the database name (PDB) e.g.
PDB ID 1TGS || PDB code ID 1TGS || PDB 1TGS.
These terms can occure multiple times in the text.

$string = "<html>Test text PDB code ID 1TGS 1O6S 1TGS bla bla \nPDB code
 1ILW 1ILV"; 
I want to get all these IDs.
this is not correct:
while($string=~/(?<=PDB).+?([1-9][A-Z0-9]{3})/g){ print $1, "\n";}
but how to get all IDs?? Thanks in advance! Yours Murcia

In reply to Regexp find all matches by Murcia

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.