I've no idea what $scalar is supposed to be; but let's assume it's the name of a file you want to sort. You could do: 
use autodie ':all';
system "sort -u '$scalar' > '$scalar.sorted'";
rename "$scalar.sorted", $scalar;

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In reply to Re: how to sort uniq $array[2] by JavaFan
in thread how to sort uniq $array[2] by auto_w

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