diff --git a/2024/src/core.clj b/2024/src/core.clj
index 6a13f39..3cb2a07 100644
--- a/2024/src/core.clj
+++ b/2024/src/core.clj
@@ -1,4 +1,12 @@
-(ns core)
+(ns core
+  (:require
+   [clojure.string :as str]))
 
 (defn compose [& fs]
   (apply comp (reverse fs)))
+
+(defn split-whitespace [s]
+  (str/split s #"\s+"))
+
+(defn get-match-groups [regex s]
+  (->> s (re-seq regex) first rest))
diff --git a/2024/src/day01.clj b/2024/src/day01.clj
index f586999..ec2d445 100644
--- a/2024/src/day01.clj
+++ b/2024/src/day01.clj
@@ -4,9 +4,8 @@
    [core :as c]))
 
 (def input (->> (get-input 1)
-                (map (c/compose #(re-seq #"(\d+)\s+(\d+)" %)
-                                first rest ; only get match groups
-                                #(mapv parse-long %)))
+                (map #(c/get-match-groups #"(\d+)\s+(\d+)" %))
+                (map #(mapv parse-long %))
                 (into {})
                 ((juxt keys vals))))