Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl: the Markov chain saw

Re: Help Extract these lines

by Laurent_R (Monsignor)
on Jun 17, 2013 at 18:52 UTC ( #1039445=note: print w/ replies, xml ) Need Help??

in reply to Help Extract these lines

Maybe something like this (quick proposal, untested):

my %my_hash; while <DATA> { chomp; my $id = (split /:/, $_)[1] if /id/; if (/name/) { my $name =~ /: "(\d+)"/; $my_hash{$name} = $id; } }

Comment on Re: Help Extract these lines
Download Code
Replies are listed 'Best First'.
Re^2: Help Extract these lines
by ww (Bishop) on Jun 17, 2013 at 21:32 UTC


    Yup, Re: Help Extract these lines doesn't even compile.
    Syntax error at Ln 2 ( which, in turn, produces a spurious error re closing curly braces ).

    If you didn't program your executable by toggling in binary, it wasn't really programming!

      Alright, I just typed an approach for a solution directly on the web page, not having access to a Perl compiler when I did it (and I said that I could not test). What I typed does not compile, but it takes less than 5 seconds to find out why and to correct it. One really easy to find compile error (adding parens after the while keyword) and one other small stupid mistake just as easy to find and to correct, and it basically works:

      use Data::Dumper; my %my_hash; my $id; while (<DATA>) { chomp; s/\r//g; $id = (split /:/, $_)[1] if /id/; if (/name/) { my $name = $1 if /\: "(\w+)"/; $my_hash{$name} = $id; } } print Dumper \%my_hash; __DATA__ "id": "xx-ada-qwebasd", "name": "telphone", "id": "fasda-asd-123123-fkja123a", "name": "car", "id": "97f921-a312-fas2", "name": "ball",
      which prints:
      $ perl $VAR1 = { 'ball' => ' "97f921-a312-fas2",', 'car' => ' "fasda-asd-123123-fkja123a",', 'telphone' => ' "xx-ada-qwebasd",' };
      I admit the data still needs a bit more cleaning, but that's really boilerplate code, and I think that this untested code basically gave a very good track towards the solution.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1039445]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others drinking their drinks and smoking their pipes about the Monastery: (4)
As of 2015-11-28 11:32 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (741 votes), past polls