comment on

Exactly what I was thinking. (:

sub tuples {
    my( $count, @set )= @_;
    my @out;
    nestedLoops(
        [ ([0..$#set]) x $count ],
        { Code => sub { push @out, [@set[@_]] } }
    );
    return \@out;
}
my $tuples= tuples( 2, qw(A B C) );
for my $tuple (  @$tuples  ) {
    print "@$tuple\n";
}
[download]

or, if you want to take advantage of iterators:

sub tupleMaker {
    my( $count, @set )= @_;
    my $iter= nestedLoops( [ ([0..$#set]) x $count ] );
    return sub { @set[ $iter->() ] };
}
my $gen= tupleMaker( 2, qw(A B C) );
while(  my @tuple= $gen->()  ) {
    print "@tuple\n";
}
[download]

which means you can deal with tons of tuples without needing tons of RAM.

- tye

In reply to Re^2: Creating tuples based on sets (nested loops) by tye
in thread Creating tuples based on sets by waxmop

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:
	&		`&`
	<		`<`
	>		`>`
	[		`[`
	]		`]`

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.


The stupid question is the question not asked
	PerlMonks