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

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Greetings all,
Sounds like a job for grep to me.
Going with the
as numbers are selected remove elements from array A repopulate list with what is remaining into array A print array A
#!/usr/bin/perl -w use strict; use Dumpvalue; my $d = new Dumpvalue; #testing my @ArrayA = (0 .. 100); print "before\n"; $d->dumpValues(\@ArrayA); print "\n"; #more testing. my @numbers_to_remove = (14 .. 36, 50 .. 63, 89, 91, 94); #here we reassign @ArrayA with the return value from #our do{} block. @ArrayA = do { #make a local copy of @ArrayA as is to begin with my @tmp = @ArrayA; #map returns a list which comes in handy here map{ #make a local copy of the incoming elements from #our local copy in @tmp my $key = $_; #use a ternary operator to make sure we are #not including numbers from our #@numbers_to_remove list. If it is not #found return it otherwise return an #empty list. (!grep /^$key$/, @numbers_to_remove) ? $key : (); }@tmp; #for each element in @tmp }; print "After\n"; $d->dumpValues(\@ArrayA); print "\n";

Seems to work fine for me but I have not benchmarked this code.
Is this what you are looking for?

After re-reading the post I would suggest going with an Array of hashes depending on what is contained in the elements of @ArrayA. Hypothetically lets say you have a hash on information returned from a database query and you store a reference to each hash in the array @ArrayB. Then let the user select which elements to remove from the array based on some id.
use Dumpvalue; my $d = new Dumpvalue; #create the hypothetical structure. An array of #hash references each with an id field in it. my @ArrayB = map{{id=>$_}}(0 .. 100); $d->dumpValues(\@ArrayB); print "\n"; #more testing. #these would correspond to id's to remove in our hypothetical #scenario. my @ids_to_remove = (14 .. 36, 50 .. 63, 89, 91, 94); @ArrayB = do{ my @tmp = @ArrayB; map{ my $key = $_->{id}; (!grep /^$key$/, @ids_to_remove) ? $_ : () ; }@tmp; }; $d->dumpValues(\@ArrayB); exit;

Update!
I added some comments to the first block of code to hopefully explain what is going on.


-InjunJoel
"I do not feel obliged to believe that the same God who endowed us with sense, reason and intellect has intended us to forego their use." -Galileo

In reply to Re: popping, shifting or splicing an array??? by injunjoel
in thread popping, shifting or splicing an array??? by drock

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, 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
  • 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.
  • 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 contemplating the Monastery: (6)
    As of 2019-11-17 22:38 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Strict and warnings: which comes first?



      Results (87 votes). Check out past polls.

      Notices?