Create 1941-check-if-all-characters-have-equal-number-of-occurrences.js

Author: everthis

1941-check-if-all-characters-have-equal-number-of-occurrences.js

@@ -0,0 +1,17 @@
+/**
+ * @param {string} s
+ * @return {boolean}
+ */
+var areOccurrencesEqual = function(s) {
+  const n = s.length
+  const arr = Array(26).fill(0), a = 'a'.charCodeAt(0)
+  for(const ch of s) {
+    arr[ch.charCodeAt(0) - a]++
+  }
+  const set = new Set()
+  for(const e of arr) {
+    if(e !== 0) set.add(e)
+    if(set.size > 1) return false
+  }
+  return true
+};