On Aug 23, 2012, at 12:57 PM, Chris Stinemetz wrote:
> Hello List,
> I'm trying to grep an array of arrays, but I am getting the following error:
>
> Can't use string ("1") as an ARRAY ref while "strict refs" in use at
> form.pl line 121, <$COORDS> line 1281.
> Press any key to continue . . .
>
>
>
> Below is the grep statement:
>
> print grep { $_->[0][0] >= 0 } @coords;
> Any idea what I am doing wrong?
If @coords is an array of arrays, then $coords[0] is a reference to an array,
and $coords[0][0] is the first element of that array (I bet that is equal to 1).
In 'grep { $_->[0][0] } @coords;', $_ is set equal to each element of the
@coords array, beginning with $coords[0]. Since that value is a reference to an
array, $_->[0] will be the first element of that array. That is what you want
to compare to 0, not $_->[0][0].
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