Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

comment on

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

Perhaps you could change the way you build your Dataobject. Instead of one array of hashes, you could build four hashes of (arrays of) hashes, each with a different field as the key. So, you could for example build a HoAoH with surname as key:

%Persons_by_surname = ( 'Schwartz' => [ { ..person 1 }, { ..person 2}, ], 'Wall' => [ {..person 1..} ] );

And the same for the other fields (except perhaps for age, where there will be a limited number of discrete values). Instead of looping over an array, this changes your algorithm to a hash lookup, which should be faster.

To facilitate your later lookup phase, you could put these data hashes in a wrapper hash like this:

my %data= ( 'surname' => \%Persons_by_surname, 'firstname' => \%Persons_by_firstname, # ... and so on );

Doing this, you'll have an initial hit on performance when building the extra hashes, but you should have faster lookups in the end. You'll have to benchmark your scripts to see whether this is worth it.

CU
Robartes-


In reply to Re: Fast seeking in a large array of hashes to generate a report. by robartes
in thread Fast seeking in a large array of hashes to generate a report. by jbrugger

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this? | Other CB clients
Other Users?
Others surveying the Monastery: (2)
As of 2022-10-02 19:28 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My preferred way to holiday/vacation is:











    Results (12 votes). Check out past polls.

    Notices?