Using
while(( my @lines = map $_ = <>, 1 .. 4 )[-1]) {

[download]
should stop if the last line is not read as well. (You might need to add defined.)
لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ

In reply to Re^3: Reading files n lines a time by choroba
in thread Reading files n lines a time by naturalsciences

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