Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??

I know this is somewhat simple, but I've been unable to wrap my head around it. I have a large txt file in the format:

*******************Folder North*************** Folder : North Folder : Lab Host : host42016 VM : host42229 VM : host42235 VM : host42236 VM : host42237 VM : host42238 VM : host42239 VM : host42240 VM : host42241 VM : host42242 VM : host42252 Host : host42049 VM : host42361 VM : host42362 VM : host42363 VM : host42364 VM : host42365 VM : host42366 VM : host42367 VM : host42368 VM : host42369 VM : host42370 *******************Folder South*************** Folder : South Folder : Staging Host : host42124 VM : host42248 VM : host42249 VM : host42250 VM : host42230 VM : host42251 VM : host42243 VM : host42244 VM : host42245 VM : host42246 VM : host42247 Host : host42125 VM : host42299 VM : host42300 VM : host42301 VM : host42302 VM : host42303 VM : host42304 VM : host42305 VM : host42306 VM : host42307 VM : host42308

I want to read the file, and populate a hash with the "Host" as the key the various "VM" as it's values. Seems easy enough and I have that with:

open (FILE, 'data.txt') || die "Unable to open file"; while (<FILE>) { $line=$_; if ($line =~ /Folder/ || $line eq ""){ next; } ($type,$name)=split(/:/); $type =~ s/^\s+//; $type =~ s/\s+$//; $name =~ s/^\s+//; $name =~ s/\s+$//; if ($type=~"Host"){ $host=$name; }elsif ($type=~"VM"){ $guest=$name; push @{$hash{$host}}, $guest; } }

Where I'm running into a brick wall is:

  1. how do I remove duplicates (Host and VM)?
  2. how do I then count the # of values per key?
I've googled, RTFM, etc; but nothing I've tried has worked to my satisfaction.


In reply to Parsing text file into a hash with multiple values per key by dayton

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others avoiding work at the Monastery: (12)
    As of 2014-10-01 12:53 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      What is your favourite meta-syntactic variable name?














      Results (18 votes), past polls