Hi there, I'm relatively new to perl and have a predicament: I have an array1 with 200k recs, array2 with 50K recs. Each array has the same amount of elements (170) and the zero element in each array is a unique identifier. I need to update array1 with certain elements of array2. So... match on the zero element, then update elements 155,158,159,etc. I've used nested for loops and it's taking an eternity. What would be the best approach to speed this process up? Thanks for any help or advice.

In reply to matching large arrays then updating by devan999

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