jonwingfield

// From https://artsy.github.io/blog/2018/11/21/conditional-types-in-typescript/
// Includes extra exercises.

type Action =
  | {
      type: "INIT"
    }
  | {
      type: "SYNC"
    }

jonwingfield

#ifdef __cplusplus
#define CCALL extern "C"

CCALL RF24* rf24_init(uint8_t ce_pin, uint8_t cs_pin) { return new RF24(ce_pin, cs_pin); }
CCALL void rf24_begin(RF24* rf24) { rf24->begin(); }
CCALL void rf24_free(RF24* rf24) { delete rf24; }


#else 
typedef struct {} RF24;

jonwingfield

; f -> x -> x
(def zero 
  (fn [f,x] x))

; 1: f -> x -> f(x)
(def one
 (fn [f,x] (f x)))

; 2: f -> x-> f(f(x))
(def two