I forgot the -l ... 

perl -lne 
 'push@{($|?"_0":"_1")},$_;eof&&$|++;END{$,=$?||map{print$_1[$-++],$_}
+ @_0}'
file1 file2

[download]

In reply to Re^2: join program in one-liner by Anonymous Monk
in thread join program in one-liner by sh1tn

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