diff --git a/src/utils/sort.js b/src/utils/sort.js
index 7a168e57..8709033a 100644
--- a/src/utils/sort.js
+++ b/src/utils/sort.js
@@ -12,4 +12,15 @@ export function sortByWeight(list, fn) {
         .map(i => [fn(i), i])
         .sort((a, b) => b[0] - a[0])
         .map(i => i[1]);
+}
+
+export function sortBy(fn) {
+    return (i1, i2) => {
+        let t1 = fn(i1);
+        let t2 = fn(i2);
+
+        if (t1 < t2) return 1;
+        if (t1 > t2) return -1;
+        return 0;
+    }
 }
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