LeetCode Rate Limiter Challenge

leetcode/easy/0359-logger-rate-limiter/README.md

@@ -0,0 +1,50 @@
+# [Logger Rate Limiter](https://leetcode.com/problems/logger-rate-limiter) ![Shield](https://img.shields.io/badge/Easy-green)
+
+Design a logger system that receives a stream of messages along with their timestamps. Each **unique** message should only be printed **at most every 10 seconds** (i.e. a message printed at timestamp `t` will prevent other identical messages from being printed until timestamp `t + 10`).
+
+All messages will come in chronological order. Several messages may arrive at the same timestamp.
+
+## Implementation
+
+Implement the `Logger` class:
+
+- `Logger()`: Initializes the `logger` object.
+- `bool shouldPrintMessage(int timestamp, string message)`: Returns `true` if the `message` should be printed at the given `timestamp`, otherwise returns `false`.
+
+---
+
+### Example
+
+#### Input
+
+```bash
+["Logger", "shouldPrintMessage", "shouldPrintMessage", "shouldPrintMessage", "shouldPrintMessage", "shouldPrintMessage", "shouldPrintMessage"]
+[[], [1, "foo"], [2, "bar"], [3, "foo"], [8, "bar"], [10, "foo"], [11, "foo"]]
+```
+
+#### Output
+
+```bash
+[null, true, true, false, false, false, true]
+```
+
+#### Explanation
+
+```bash
+Logger logger = new Logger();
+logger.shouldPrintMessage(1, "foo");  // return true, next allowed timestamp for "foo" is 1 + 10 = 11
+logger.shouldPrintMessage(2, "bar");  // return true, next allowed timestamp for "bar" is 2 + 10 = 12
+logger.shouldPrintMessage(3, "foo");  // 3 < 11, return false
+logger.shouldPrintMessage(8, "bar");  // 8 < 12, return false
+logger.shouldPrintMessage(10, "foo"); // 10 < 11, return false
+logger.shouldPrintMessage(11, "foo"); // 11 >= 11, return true, next allowed timestamp for "foo" is 11 + 10 = 21
+```
+
+---
+
+## Constraints
+
+- `0 <= timestamp <= 10^9`
+- Every `timestamp` will be passed in non-decreasing order (chronological order).
+- `1 <= message.length <= 30`
+- At most `10^4` calls will be made to `shouldPrintMessage`.

0359-logger-rate-limiter/logger-rate-limiter.ts → leetcode/easy/0359-logger-rate-limiter/logger-rate-limiter.ts

@@ -1,9 +1,9 @@
-class Logger {
+export class Logger {
   messageMap = new Map<string, number>();
 
   shouldPrintMessage(timestamp: number, message: string): boolean {
     if (this.messageMap.has(message)) {
-      const lastTimestamp = this.messageMap.get(message);
+      const lastTimestamp = this.messageMap.get(message)!;
       if (timestamp >= lastTimestamp + 10) {
         this.messageMap.set(message, timestamp);
         return true;