On Wed, Apr 9, 2014 at 5:34 AM, Piaget Modeler <[email protected]>wrote:
> I'm going to tease you all with something I've been working on.
>
> The Premise Language REPL.
>
>
> Today we'll look at two language intrinsics and a user defined function.
>
> (*pick* *n sequence *)
>
> forms a sequence of n arbitrary items
>
>
> (*random* *number1 number2* )
>
> chooses a number within a range
>
>
> The pick intrinsic selects n arbitrary items from an existing sequence.
>
> The random intrinsic selects a random number within a range.
>
> Allen Newell and Herbert Simon thought the chunk was a very significant
> number:
> 7 +/- 2 items. To honor their discovery, we can write a function called
> Chunk which
> takes a sequence and returns a random chunk of it.
>
>
> function *chunk *{?list}
> (pick (+ 7 (random -2 2)) ?list)
> end
>
Out of curiosity, why do you adopt S-expressions only partially in the
language syntax?
Cheers,
Telmo.
>
> .: chunk
>
>
> So we pass in a list, and receive a random chunk of it.
>
> Here are a few examples:
>
> (put {a b c d e f g h i j k l m n o p q r s t u v w x y z} ?alphabet)
>
> .: {a b c d e f g h i j k l m n o p q r s t u v w x y z}
>
> (chunk ?alphabet)
>
> .: {c m f h l x}
>
> (chunk ?alphabet)
>
> .: {k h a b f}
>
> (chunk ?alphabet)
>
> .: {w k g s y b l}
>
> (chunk (range 1 to 2000))
>
> .: {331 230 291 1017 1530 504 109 280}
>
> (chunk (range 1 to 2000))
>
> .: {1313 491 1559 1076 1670}
>
>
> And there you have it.
>
> Voila.
>
>
>
>
>
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