Time: 83 ms (78.72%), Space: 44.2 MB (71.77%) - LeetHub

Author: ManiruzzamanAkash

819-most-common-word/819-most-common-word.js

@@ -0,0 +1,33 @@
+/**
+ * Find Most Common Word
+ *
+ * @param {string} paragraph
+ * @param {string[]} banned
+ * @return {string}
+ */
+var mostCommonWord = function(paragraph, banned) {
+    const matchedWords = paragraph.match(/\w+/g);
+    const hashmap = {};
+
+    let mostCommonWord = '';
+    let mostCommonWordCount = 0;
+
+    matchedWords.forEach(wordString => {
+        const word = wordString.trim().toLowerCase();
+
+        if (!banned.includes(word)) {
+            if (Object.keys(hashmap).includes(word)) {
+                hashmap[word] = parseInt(hashmap?.[word] ?? 0) + 1;
+            } else {
+                hashmap[word] = 1;
+            }
+            
+            if (hashmap[word] > mostCommonWordCount) {
+                mostCommonWordCount = hashmap[word];
+                mostCommonWord = word;
+            }
+        }
+    });
+    
+    return mostCommonWord;
+};