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August 29, 2015 14:15
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JS version of code from Jim Weirichs Talk on Lambda Calculus (https://www.youtube.com/watch?v=FITJMJjASUs)
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// Y Combinator | |
// makes the recursion | |
(function(improver) { | |
return (function(gen) { return gen(gen) })( | |
function(gen) { | |
return improver(function(v) { | |
return gen(gen)(v) | |
}) | |
} | |
) | |
})( | |
// this part is the condition for the factorial | |
function(partial) { | |
return function(n) { | |
return n === 0 ? 1 : n * partial(n - 1) | |
} | |
} | |
// pass any number here to get its factorial | |
)(5) |
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