Hi Monks - I have been trying to do this (tested and working as intended, gives "-->a,4,6<--" out) : 
use strict;

my(@Array1);

my(@Array2);

@Array1     = (0,1,'a',3,4,5,6);

@Array2     = (2,4,6);

@Array1    = @Array1[ ( @Array2 ) ];

printf STDOUT ("-->%s<--\n", join( ",",  @Array1 ) );

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But with array references. My line looks like this : 
@{ $Row->{ Cells } }    = @{ $Row->{ Cells }[ ( @$FieldOrder ) ] };

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But I'm getting 'Not an ARRAY reference' errors. Thanks in advance, and apologies for what is probably a basic question.

In reply to Array refs problem ... by Tharg

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