macro
boot.janet on line 565 , column 1
(eachk x ds & body )
Loop over each key in `ds` . Returns nil.
(eachk k [1 2 3 ] (print k ))
# prints 0
# prints 1
# prints 2
# for indexed collections indices are printed
(eachk k {:a "a val" :b "b val" :c "c val" } (print k ))
# prints c
# prints a
# prints b