Create 893-groups-of-special-equivalent-strings.js

Author: everthis

893-groups-of-special-equivalent-strings.js

@@ -0,0 +1,16 @@
+/**
+ * @param {string[]} A
+ * @return {number}
+ */
+const numSpecialEquivGroups = function(A) {
+  return new Set(
+    A.map(word =>
+      [...word]
+        .reduce((counter, c, i) => {
+          counter[c.charCodeAt(0) - "a".charCodeAt(0) + 26 * (i % 2)]++;
+          return counter;
+        }, new Array(52).fill(0))
+        .join("-")
+    )
+  ).size;
+};