Address changes to PR adding threading forms

resources/koans.clj

@@ -275,7 +275,8 @@
                                12
                                [1 2 3]]}]
 
- ["26_transducers" {"__" [[2 4]
+ ["26_transducers" {"__" ['(2 3 4)
+                          [2 4]
                           [2 4]
                           [2 4]
                           6]}]

src/koans/25_threading_macros.clj

@@ -7,15 +7,11 @@
 (def a-list-with-maps
   '({:a 1} {:a 2} {:a 3}))
 
-(defn function-that-takes-a-map [m a b]
-  (do
-    (println (str "Other unused arguments: " a " " b))
-    (get m :a)))
+(defn function-that-takes-a-map [map a b]
+  (get map :a))
 
 (defn function-that-takes-a-coll [a b coll]
-  (do
-    (println (str "Other unused arguments: " a " " b))
-    (map :a coll)))
+  (map :a coll))
 
 (meditations
  "We can use thread first for more readable sequential operations"

src/koans/26_transducers.clj

@@ -1,23 +1,30 @@
 (ns koans.26-transducers
   (:require [koan-engine.core :refer :all]))
 
-(def xfms
+(def example-transducer
+  (map inc))
+
+(def transforms
   (comp (map inc)
-  (filter even?)))
+        (filter even?)))
 
 (meditations
- "Consider that sequence operations can be used as transducers"
+ "A sequence operation with only one argument often returns a transducer"
  (= __
-    (transduce xfms conj [1 2 3]))
+    (sequence example-transducer [1 2 3]))
+
+ "Consider that sequence operations can be composed as transducers"
+ (= __
+    (transduce transforms conj [1 2 3]))
 
  "We can do this eagerly"
  (= __
-    (into [] xfms [1 2 3]))
+    (into [] transforms [1 2 3]))
  
  "Or lazily"
  (= __
-    (sequence xfms [1 2 3]))
+    (sequence transforms [1 2 3]))
 
  "The transduce function can combine mapping and reduction"
  (= __
-    (transduce xfms + [1 2 3])))
+    (transduce transforms + [1 2 3])))