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my $arr = array( 1 .. 7 );
my $tuples = $arr ->tuples(2);
is_deeply
[ $tuples ->all ],
[
[ 1, 2 ],
[ 3, 4 ],
[ 5, 6 ],
[ 7 ]
],
'tuples (pairs, odd elements) ok' ;
my $default = $arr ->tuples;
is_deeply [ $default ->all ], [ $tuples ->all ],
'tuples default 2 ok' ;
is_deeply
[ array(1 .. 6)->tuples->all ],
[
[ 1, 2 ],
[ 3, 4 ],
[ 5, 6 ]
],
'tuples (pairs, even elements) ok' ;
is_deeply
[ array(1 .. 6)->tuples(6)->all ],
[ [ 1 .. 6 ] ],
'tuples (all) ok' ;
ok array->tuples(2)->is_empty, 'empty array tuples ok' ;
eval {; $arr ->tuples(0) };
like $@, qr/positive/ , 'tuples < 1 dies ok' ;
my $withbless = array(1..4)->tuples(2, undef , 'bless' );
ok $withbless ->count == 2, 'tuples (pairs, blessed) produced 2 tuples' ;
for (0,1) {
isa_ok $withbless ->get( $_ ), 'List::Objects::WithUtils::Array' , "tuple ($_)" ;
}
is_deeply
[ $withbless ->all ],
[ [ 1, 2 ], [ 3, 4 ] ],
'tuples (pairs, blessed) ok' ;
done_testing;
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