my @dev;
while(<DEV>){
chomp;
@dev = <DEV>;
}
This almost certainly does not do what you want.
In the while(<DEV>) it reads a line from the file, in the chomp; line it removes the trailing newline, and then in the line @dev = <DEV> it ignores the read line, and reads all the rest of the lines into the array. Without any newline removal.
What you probably meant to write was
while (<DEV>) {
chomp;
push @dev, $_;
}
Or even simpler:
my @dev = <DEV>;
chomp @dev;
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