Logger Rate Limiter

#leetcode #design #hashtable

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.

Implement the Logger class:

1. Logger() Initializes the logger object.
2. bool shouldPrintMessage(int timestamp, string message) Returns true if the message should be printed in the given timestamp, otherwise returns false.

var Logger = function() {
    this.map = new Map();
};

Logger.prototype.shouldPrintMessage = function(timestamp, message) {
   if(this.map.has(message)){
       const prevTime = this.map.get(message);
       if(timestamp < prevTime + 10) return false;
   }
   this.map.set(message, timestamp);
   return true;
};