Question

I’m supposed to take this code:

f x y z = x^3 - g (x + g (y - g z) + g (z^2))
 where g x = 2*x^2 + 10*x + 1

And rewrite it without where (or let).

They mean to write it with a Lambda function (\x ->…)

I’m trying to reuse a Lambda function on Haskell. Any ideas?

Answer 1

As bravit hints at, you can rewrite a non-recursive let using a lambda in the following way:

let x = A in B     ==>     (\x -> B) A 

where x is a variable and A and B are expressions.