All excercises done

.gitignore

@@ -8,3 +8,4 @@
 /checkouts
 /.lein-deps-sum
 /.lein-plugins
+/bin/

src/predicates.clj

@@ -1,41 +1,43 @@
 (ns predicates)
 
 (defn sum-f [f g x]
-  :-)
+  (+ (f x) (g x)))
 
 (defn less-than [n]
-  :-)
+  (fn [k] (< k n)))   
 
 (defn equal-to [n]
-  :-)
+  (fn [k] (== k n))) 
 
 (defn set->predicate [a-set]
-  :-)
+  (fn [x] (contains? a-set x))) 
 
 (defn pred-and [pred1 pred2]
-  :-)
+  (fn [x] (and (pred1 x) (pred2 x)))) 
 
 (defn pred-or [pred1 pred2]
-  :-)
+  (fn [x] (or (pred1 x) (pred2 x)))) 
 
 (defn whitespace? [character]
   (Character/isWhitespace character))
 
 (defn blank? [string]
-  :-)
+  (every? whitespace? string)) 
 
 (defn has-award? [book award]
-  :-)
+  (contains? (book :awards) award)) 
 
 (defn HAS-ALL-THE-AWARDS? [book awards]
-  :-)
+  (every? (fn [award] (has-award? book award)) awards)) 
 
 (defn my-some [pred a-seq]
-  :-)
+  (first (map pred (filter pred a-seq)))) 
 
 (defn my-every? [pred a-seq]
-  :-)
+  (empty? (filter (complement pred) a-seq))) 
 
 (defn prime? [n]
-  :-)
+  (let [pred (fn [fact] (= 0 (mod n fact)))]
+    (not (some pred (range 2 (+ 1 (/ n 2)))))))
+
 ;^^