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In Haskell all functions are originally curried, right?
So, let's look at the max function, and I'll write what I understand about how this works.
When I write something like this:
max 4 5
What happens is that a new funcion is created that internally has value of 4, which then recieves a value, so this function is applied to 5 and a correct value is returned?
Did I say something wrong somehow or is this correct?
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uncurry converts a curried function to a function on pairs. All it does is it takes a function (a -> b -> c) and returns a function that takes the parameters as a tuple.
The following basic example uses currying. function multiply(a, b, c) { return a * b * c; } function multiply_curried(a) { return function (b) { return function (c) { return a * b * c } } } let res = multiply(1, 2, 3); console. log(res); let mc1 = multiply_curried(1); let mc2 = mc1(2); let res2 = mc2(3); console.
Simple answer. Currying: Lets you call a function, splitting it in multiple calls, providing one argument per-call. Partial Application: Lets you call a function, splitting it in multiple calls, providing multiple arguments per-call.
Charles Nathaniel Haskell (March 13, 1860 – July 5, 1933) was an American lawyer, oilman, and politician who was the first governor of Oklahoma.
That's correct. You can remember what currying is all about by memorizing two of its most important identities:
-- Function type right-associativity:
a -> b -> c = a -> (b -> c)
-- Function application left-associativity:
f x y = (f x) y
These two identities work together and produce a curried language.
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