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Using the combinator-based definitions for cons, head, and tail from the "Higher...
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Using the combinator-based definitions for cons, head, and tail from the "Higher-Order Functions" chapter:
cons = x => y => f => f(x)(y)head = l => l(K) where K = x => y => xtail = l => l(K(I)) where I = x => x
What is the result of head(tail(cons(1)(cons(2)(null))))?
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