perl 怎样合并两个数组，并除去相同的元素？

Question

my @array1 = ('aa', 'bb');
my @array2 = ('cc', 'aa');

怎样得到 @array3 = ('aa', 'bb', 'cc') ???

Answer 1

my %h = ();++$h{$_} foreach ( @array1, @array2 );my @array3 = sort keys %h;

Answer 2

my @array1 = ('aa', 'bb');my @array2 = ('cc', 'aa');@array3 = (@array1, @array2);my %count;my @array3_new = grep { ++$count{ $_ } < 2; } @array3;print @array3_new;或者@array3 = (@array1, @array2);foreach my $item ( @array3 ){if ( ! grep( /$item/, @array3_new ) ){push( @array3_new, $item );}}print @array3_new;&nbsp;