countWords.js

amit265 · amit265 · commit 859f0424552a · 2026-03-09T20:17:37.000+05:30
diff --git a/javascript/5_string-programs/countWords.js b/javascript/5_string-programs/countWords.js
@@ -1,10 +1,68 @@
 // 1. Count Words of a String
 
-// 1. Using split() Method 
+// 1. Using split() Method
 
 {
   const count = (s) => s.trim().split(/\s+/).length;
 
   const s = "Hello, this is a simple test";
-  console.log(count(s)); 
+  console.log(count(s));
+}
+
+// 2. Using Regular Expressions
+
+{
+  const count = (s) => (s.match(/\b\w+\b/g) || []).length;
+
+  const s = "Hello, this is a simple test.";
+  console.log(count(s));
+}
+
+// 3. Using reduce() Method
+
+{
+  const count = (s) =>
+    s
+      .trim()
+      .split(/\s+/)
+      .reduce((count) => count + 1, 0);
+  const s = "Hello, this is a simple test";
+  console.log(count(s));
+}
+
+// 4. Using a Loop
+
+{
+  const count = (s) => {
+    let c = 0;
+    let inWord = false;
+    for (const char of s) {
+      if (/\s/.test(char)) {
+        inWord = false;
+      } else if (!inWord) {
+        inWord = true;
+        c++;
+      }
+    }
+    return c;
+  };
+
+  const s = "Hello, this is not a simple test";
+  console.log(count(s));
+}
+
+// 5. Using matchAll() Method
+
+{
+  const count = (s) => [...s.matchAll(/\b\w+\b/g)].length;
+  const s = "My name is amit";
+  console.log(count(s));
+}
+
+// 6. Using Array.from() and filter() Methods
+
+{
+  const count = (s) => Array.from(s.split(/\s+/).filter(Boolean)).length;
+  const s = "Hello i am not amit";
+  console.log(count(s));
 }
