Something like this? 

@arr = map {qr/\Q$_\E/} @arr;
my @keepers = do {
    local $" = '|';
    grep { m/@arr/ } <>;
};

[download]
Efficiency can be improved by ordering @arr by commonest words first. m// is a stringifying interpolated quote-like operator, so $" gets inserted between array elements, making a regex alternation.

If that's too slow, you can make a hash with @arr as keys and look for existence over a split of your input lines. 

my (%hsh, @keepers);
@hsh{@arr} = ();
while (<>) {
    push @keepers, $_ if grep {exists $hsh{$_}} split;
}

[download]
That contains a number of tricks you may not know; default args for split, hash slice, two different $_'s in a statement.

Reading the file line by line is not a big drag on speed if you get to only read the file once.

After Compline,
Zaxo

In reply to Re: Looking for function similer to member() in SKILL by Zaxo
in thread Looking for function similer to member() in SKILL by riz

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