You are overwriting @results: 
@results = grep { /$match/ } @data2;

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To add a new value (or values) to an array, use push: 

push @results, grep { /$match/ } @data2;

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لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re: Help understand why this grep does not work by choroba
in thread Help understand why this grep does not work by drmrgd

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