diff --git a/src/utils/common.js b/src/utils/common.js
index 0178cd45..72881b1c 100644
--- a/src/utils/common.js
+++ b/src/utils/common.js
@@ -13,4 +13,32 @@ export function range(start, num, step) {
         val += step;
     }
     return list;
+}
+
+/**
+ * Return a closure that compares a Number argument with specified Number
+ * @param withNumber Number to compare with
+ * @returns {Function} (i) => {}
+ */
+export function numberEquals(withNumber) {
+    return i => i === withNumber;
+}
+
+/**
+ * Return a closure that compares a second Number argument with specified Number
+ * @param withNumber Number to compare with
+ * @returns {Function} (i) => {}
+ */
+export function indexEquals(withNumber) {
+    return (_, i) => i === withNumber;
+}
+
+/**
+ * Return a reduce function
+ * [['spring', 'Весена'], ['autumn', 'Осень']] -> 'Весна' or 'Осень' depend on byCondition result
+ * @param byCondition
+ * @param map
+ */
+export function translateAnItem(byCondition, map){
+    return (result, item) => byCondition(item) ? map(item): map(result)
 }
\ No newline at end of file