Create 819-most-common-word.js

Author: everthis

819-most-common-word.js

@@ -0,0 +1,23 @@
+/**
+ * @param {string} paragraph
+ * @param {string[]} banned
+ * @return {string}
+ */
+const mostCommonWord = function(paragraph, banned) {
+    const str = paragraph.toLowerCase()
+    const arr = str.replace(/\W+/g, ' ').trim().split(' ')
+    const hash = {}
+    for(let el of arr) {
+        if(banned.indexOf(el) !== -1) {
+
+        } else {
+           if(hash.hasOwnProperty(el)) {
+              hash[el] += 1
+           } else {
+               hash[el] = 1
+           }
+        }
+    }
+    const res = Object.entries(hash).sort((a, b) => b[1] - a[1])
+    return res[0][0]
+};