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#!/usr/local/bin/perl
my @source = ("aaa", "aaa", "bbb", "ccc", "ddd");

my $index=0;
my @uniq;
my $e;

foreach $e (@source) # Good practice to use variables instead of default $_
{
#...

Yes, you can.


# delete those files matching $1 variable
for ((index=0; index<${#MAILERS[@]}; index++)); do
ssh ${MAILERS[$index]} "find /path -name '*$1*' -exec rm {} \; >/dev/null 2&>1" &...