Since you didn't show any input data, and you didn't elaborate on "I cant get grep to work", I can only guess at a couple of likely problems.

You might need to chomp your input: 

chomp(@raw_data, @fileb);

[download]

You might need to use quotemeta on your regex: 

$testit = quotemeta $_;

[download]

Misc advice:

In reply to Re: using grep to search an array by toolic
in thread using grep to search an array by alicatserver

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