Redefining a Function's Prototype?

Redefining a Function's Prototype?

<div>I've been trying to find a post (I believe by John) that talks about redefining a function's prototype for situations where you make a calculation one and return a static value for calls there after... I can't find it for the life of me. I remember it being posted on ajaxian also. Does this ring a bell with anyone or should I dismiss it as a double shot of cafinated addiction?
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<div>Cheers,</div>
<div>-Jonathan</div>