Greetings,

I am kind of stuck , so would need help from you all. Here is the problem description -

I have a text file which has some xml tags. Say file is input.txt

Contents of this file as are like -

<MyId><data>1332</data>................</MyId> <MyId><data>1332</data>................</MyId><MyId><data>1332 </data>................</MyId><MyId><data>1332</data>................</MyId> <MyId><data>1332</data>................</MyId>

Each string starting from <MyId> and ending at </MyId> (both inclusive) is a trade message. I need to get each of the trade messages, and need to arrange them in a file such that each line starts with <MyId> and ends at </MyId>. Or in other words you can say, one trade message per line. No distortation.

Another potential problem is each trade message is very very huge and a file can have any number of messages say around 5000 or 10,000 or anything. Basically the volume is very huge, so I cannot read the whole file into one variable and do the pattern search.

I would really appreciate a quick response.

Thanks

In reply to Pattern Search Across Multiple Lines by Rajpreet

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.