chickadee » transducers » hashmap-fold

Fold operation over SRFI-146 mappings. Replaces the fold operation provided by the (srfi 146) module. These can be used with transducers in the following way:

 
(import (only (srfi 128)
              make-default-comparator)
        (srfi 146)
        (srfi 146 hash)
        transducers)

(transduce mapping-fold
           values
           (collect-list)
           (mapping (make-default-comparator)
                    'a 1
                    'b 2
                    'c 3
                    'd 4))

; => ((a . 1) (b . 2) (c . 3) (d . 4))