Not exactly the model of efficiency... 
my @list = ( 41888, 41889, 41890, 41892, 41895 );

my @missing = grep { my $x=$_; not grep $x==$_, @list } $list[0]..$lis
+t[$#list];

print "@missing\n";

[download]

-- All code is 100% tested and functional unless otherwise noted.

In reply to Re: Finding missing numbers in a list by sleepingsquirrel
in thread Finding missing numbers in a list by Morlane

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