Fifth set done

src/predicates.clj

@@ -1,41 +1,48 @@
 (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]
-  :-)
+  (or (every? whitespace? string) (= 0 (count string))))
 
 (defn has-award? [book award]
-  :-)
+  (contains? (:awards book) award))
 
 (defn HAS-ALL-THE-AWARDS? [book awards]
-  :-)
+  (every? (:awards book) awards))
 
 (defn my-some [pred a-seq]
-  :-)
+  (let [filtered (filter (fn [x] (pred x)) a-seq)]
+    (cond
+      (empty? filtered) false
+      (= pred first) (apply int (first filtered))
+      :else true
+    )))
 
 (defn my-every? [pred a-seq]
-  :-)
+  (let [filtered (filter (fn [x] ((complement pred) x)) a-seq)]
+    (empty? filtered)))
 
 (defn prime? [n]
-  :-)
+  (let [pred (fn [x] (and (pos? (/ x x)) (pos? (/ x 1))))]
+    (not (some pred (range 2 n)))))
 ;^^