I already started writing what I'v done and the answers stopped me in the middle, but here goes my old and wrong code:

my $str = 'test number X';
my @numbers = (2, 3, 4);

@newArray = map { ($_ = $str) =~ s/X/$_/ } @numbers;
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But I must add that I realized that wouldn't work even before I tried testing it, coz $_ in the regexp is no longer the one I expected.

Thanks.

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