I think simply attrs.hasOwnProperty('arr') will suffice.
On Monday, February 3, 2014 5:52:52 AM UTC+2, Sander Elias wrote:
>
> Hi Mark,
>
> out the top of my hat (UNTESTED!):
> if (!angular.isdefined(attrs.arr)) { throw new Error('missing required ARR
> attribute')}
>
> Regards
> Sander
>
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