Function B

index.js:410–416

(f)

  //  B :: (b -> c) -> (a -> b) -> a -> c
  function B(f) {
    return function(g) {
      return function(x) {
        return f (g (x));
      };
    };
  }

  //  C :: (a -> b -> c) -> b -> a -> c
  function C(f) {