This document shows examples of using promise lists in Clojure. Some key points: 1) It creates a promise list with "puppies" and appends "ducklings", then closes the list. 2) It maps, reduces, and filters promise lists, accessing the results asynchronously through done. 3) It demonstrates combining multiple promise lists through for, and reducing the results into a single value.

1. PROMISE LISTS

2. (let [[reader writer] (open-plist)])

3. (append! writer (promise "puppies"))

4. (done
(first reader)
#(log "first: " %))

5. (done
(first reader)
!#(log "first (again): " %))

6. (done
!(nth reader 1)
!#(log "second: " %))

7. (append! writer (promise "ducklings"))

8. (close! writer)

9. (done
! (nth reader 2)
! #(log "after close nil?: " (nil? %)))

10. (done
! (first (closed-plist "owlet"))
! #(log "closed plist: " %))

11. (done
(->> reader
(map (fmap #(str "baby " %)))
rest
first)
#(log "mapped: " %))

12. (done
!(reduce (fmap +)
!!(r/map (fmap inc)
!!!(closed-plist 1 2 3 4)))
#(log "reduced: " %))

13. (done
!(first
!!(mapd* inc
!!!(closed-plist 1 2 3 4)))
!#(log "mapd*: " %))

14. (done
(reduce (fmap conj) (promise [])
(for-plist [a (closed-plist 1 2 3)
b (closed-plist 4 5 6)
v (closed-plist a b)]
v))
(comp log clj->js))