Yes you're perfectly right, thanks for mentioning it. However I haven't told that the strings I need to check have a rather static format of:

<userid>_<8-digit-number-starting-with-9>_dp

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In reply to Re^3: How to make sure no elements from @array are inside $scalar by Steffen
in thread How to make sure no elements from @array are inside $scalar by Steffen

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