Try hash instead of hashref. "+" added to avoid mis-interpretation of "map": 
@tempCustArray = keys %{+ map { $_ => 1 } @webCustomers };

[download]
UPDATE 1: That passes syntax, but does not seem to give the desired result .. still testing ....

Update 2: This works: 

my @t = keys %{+{ +map { $_ => 1 } qw|uno dos tres| }}

[download]
Now I have to figure out WHY it works..... and pre-Update1 does not..

Update 3: The "+" signs are unnecessary .. this works: 

@tempCustArray = keys %{{ map { $_ => 1 } @webCustomers }}

[download]
So - it seems to be a question of why the extra braces are required.

                Memory fault   --   brain fried

In reply to Re: Fixing: Experimental keys on scalar is now forbidden by NetWallah
in thread Fixing: Experimental keys on scalar is now forbidden by TheVend

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