25

src/koans/25_threading_macros.clj

@@ -15,23 +15,23 @@
 
 (meditations
  "We can use thread first for more readable sequential operations"
- (= __
+ (= {:a 1}
     (-> {}
         (assoc :a 1)))
 
  "Consider also the case of strings"
- (= __
+ (= "Hello world, and moon, and stars"
     (-> "Hello world"
         (str ", and moon")
         (str ", and stars")))
 
  "When a function has no arguments to partially apply, just reference it"
- (= __
+ (= "String with a trailing space"
     (-> "String with a trailing space "
         clojure.string/trim))
 
  "Most operations that take a scalar value as an argument can be threaded-first"
- (= __
+ (= 6
     (-> {}
         (assoc :a 1)
         (assoc :b 2)
@@ -41,18 +41,18 @@
         (get-in [:c :e])))
 
  "We can use functions we have written ourselves that follow this pattern"
- (= __
-    (-> {}
-        (assoc :a 1)
-        (function-that-takes-a-map "hello" "there")))
+ (= 1
+  (-> {}
+      (assoc :a 1)
+      (function-that-takes-a-map "hello" "there")))
 
  "We can also thread last using ->>"
- (= __
+ (= '(2 3 4)
     (->> [1 2 3]
          (map inc)))
 
  "Most operations that take a collection can be threaded-last"
- (= __
+ (= 12
     (->> a-list
          (map inc)
          (filter even?)
@@ -60,7 +60,8 @@
          (reduce +)))
 
  "We can use functions we have written ourselves that follow this pattern"
- (= __
+ (= [1 2 3]
     (->> a-list-with-maps
          (function-that-takes-a-coll "hello" "there")
-         (into []))))
+         (into [])
+         )))