Create longest-substring-without-repeating-characters.ts

Author: c4nzin

longest-substring-without-repeating-characters.ts

@@ -0,0 +1,21 @@
+function lengthOfLongestSubstring(s: string): number {
+    if (s.length === 0) {
+        return 0;
+    }
+
+    let maxLength = 0;
+    let left = 0;
+    const uniqueChars = new Set<string>();
+
+    for (let right = 0; right < s.length; right++) {
+        while (uniqueChars.has(s[right])) {
+            uniqueChars.delete(s[left]);
+            left++;
+        }
+        uniqueChars.add(s[right]);
+        maxLength = Math.max(maxLength, right - left + 1);
+    }
+
+    return maxLength;
+}
+