A simpler way to test for existance (and the reason I love hashes) is to replace 
foreach (keys %hash_table) {
    if ($_ eq $ordnum) {

[download]
with 
if ( defined( $hash_table{ $ordnum } ) ) {

[download]

In reply to Re^5: Looping through a file by apl
in thread Looping through a file by baixiaohu

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