[racket] on-key question

On Mar 14, 2012, at 9:05 AM, Roelof Wobben wrote:

> As far as I can see I have three different things.
> 
> 1) Input is a character.    Append it to the world.
> 2) Input is a  like this one /t . Do nothing.
> 3) Input is a  double or more string like right. Do nothing.
> 
> I have to figure out how i can distinct the 1 and 2 from each other.  They both have lenght 1.

I'm a bit confused by this message, but I'm going to go out on a limb and suggest that both this question and your prior one will be self-answered if you write down test cases for your situations 1, 2, and 3 above.

John Clements

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