Maintain a certain number of elements inside an array?

drewboy has asked for the wisdom of the Perl Monks concerning the following question:

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Re: Maintain a certain number of elements inside an array? by tachyon (Chancellor) on Oct 23, 2001 at 22:49 UTC
Here are a few different ways: `@too_many = qw ( 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ); # use a slice @top_ten = @too_many[0..9]; print "@top_ten\n"; # or perhaps a push push @ten, $too_many[$_] for 0..9; print "@ten\n"; # or be a little obscure pop @too_many while @too_many > 10; print "@too_many\n";` [download] TIMTOWTDI cheers tachyon s&&rsenoyhcatreve&&&s&n.+t&"$'$`$\"$\&"&ee&&y&srve&&d&&print	[reply] [d/l]
Re: Maintain a certain number of elements inside an array? by chipmunk (Parson) on Oct 23, 2001 at 23:58 UTC
One more way to do it: `splice @topten, 10;` That lops off all the elements at index 10 and higher.	[reply] [d/l]
Re: Maintain a certain number of elements inside an array? by tommyw (Hermit) on Oct 24, 2001 at 02:24 UTC
I'm suprised it's not been mentioned. Simply: `$#topten=9` [download]	[reply] [d/l]
Re: Maintain a certain number of elements inside an array? by Fletch (Bishop) on Oct 23, 2001 at 22:51 UTC
`for( my $i = 0; $i <= 9; $i++ ) { do_whatever( $topten[ $i ] ); } # or foreach( @topten[ 0 .. 9 ] ) { do_whatever( $_ ); } # or @topten = @topten[ 0 .. 9 ]; do_whatever( $_ ) foreach @topten; # or $#topten = 9; do_whatever( $_ ) for @topten;` [download]	[reply] [d/l]
Re: Maintain a certain number of elements inside an array? by joealba (Hermit) on Oct 23, 2001 at 22:58 UTC
`@topten = @topten[0..9];` [download]	[reply] [d/l]
Re: Maintain a certain number of elements inside an array? by higle (Chaplain) on Oct 23, 2001 at 22:47 UTC
Perhaps if you showed your code, we might be of more service... The only thing I can think of without your example source is a little something that irked me when I first started... Variables in Perl are, by default, "global" in a sense. In other languages, the scope of a variable is, by default, local to the subroutine or class or whatever is using the variable.... So, if you don't re-initialize a variable each time a subroutine fires, it might still have residual values from a previous iteration of the subroutine, thus you get unpredictable array results, etceteras. That's about all I can offer, without seeing your code... --higle	[reply]
Re: Maintain a certain number of elements inside an array? by drewboy (Sexton) on Nov 03, 2001 at 03:17 UTC
Thanks for all your help! The splice suggestion by tommyw did it for me. Ciao!	[reply]