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| This is a [cross post](http://mathematica.stackexchange.com/q/54662/4330) from mathematica.stackexchange.com. |
| David, thank you so much :). |
| This was cross posted to mathematica.stackexchange.com http://mathematica.stackexchange.com/q/38633/4330 |
| Nick James, I am also quite interested in this. Sadly I now know practically nobody even going to high school. Oh well, good luck! |
| I always use `Unevaluated[Sequence[]]` inside If as my "vanishing function". So techinically I just use Sequence[]. That seems straightforward :). But this is nothing new I see, it can be found by following some more links in the linked article... |