Emm...Here is how the code looks like and i would like the output to be "my_sub0_sub1" but because @array pass the hash value into the $variable and sometimes it would cause the output become "my_sub1_sub0". But removing the sort in foreach loop seems to solve this issue, which makes me puzzle:/ 
my $style ="my_";
foreach$variable (sort @array){
 my $id = XMLP::GetElementAttribute($variable,"ID");
 $sub .=  "_sub" ;
 $sub .=  $id ;
 }
 $style .= $sub;

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In reply to Re: why does array return the hash value? by noobnoob
in thread why does array return the hash value? by noobnoob

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