What is the function from which all other functions can be derived?

Posted by ChrisD on Stack Overflow See other posts from Stack Overflow or by ChrisD
Published on 2010-05-22T15:39:27Z Indexed on 2010/05/22 15:40 UTC
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I seem to remember reading about a function that could be used to make all other functions. Does anyone know what it is? And how could such a function be used?

I can't remember where I read it and my google-fu is not strong enough.

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