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Why do you persist in using two arrays when virtually all the answers in your previous thread (A better way to make the script run faster?) advised you to use a hash, which would make your script at least an order of magnitude faster.

Anyway, you want something like:

grep($genes[$index] eq $_, @gl)

The first argument to grep is an expression or a block which is expected to return true or false.

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re: How to I check if a value is present in an array? by tobyink
in thread How to I check if a value is present in an array? by rocketperl

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