On Sat, Jan 13, 2018 at 08:14:30AM -0800, Zelphir Kaltstahl wrote:
> Anyway, I hope to understand how the Y-combinator works with the help of 
> "The Little Schemer", which I am reading currently. I am not at that 
> chapter yet. I am taking my time, first thinking through the stuff and 
> later typing it into the machine and thinking about it again, sometimes 
> noticing some detail when I type the code and sometimes making a little 
> experiment with that code. Already on my way through "The Little Schemer" I 
> hit some useful procedures, which helped me with a totally unrelated 
> problem when coding my blog in Racket. So it's definitely useful.

The Y combinator comes from the original lambda calculus, which was a 
formal system for computational logic and it elicidated how bound and 
free variables work.

But the system had no built-in mechanism for defining a recursive 

Instead, the Y-combinator was invented -- a lamnda expression that 
enable you to make a recursive function essentially by passing the 
functiion as an argument to itself.  Receiving itself as a parameter, it 
was capable of calling its parameter, which was itself.

Have fun deciphering the code.  It took me while, too, way back in the 

-- hendrik

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