That's because 
while (<CSV1>) {

[download]

in fact means 

while (defined( $_ = <CSV1> )) {

[download]
($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

[download]

In reply to Re^25: Addional "year" matching functionality in word matching script by choroba
in thread Addional "year" matching functionality in word matching script by bms9nmh

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