Create 933-number-of-recent-calls.js

Author: everthis

933-number-of-recent-calls.js

@@ -0,0 +1,26 @@
+const RecentCounter = function() {
+    this.pings = [];
+};
+
+/** 
+ * @param {number} t
+ * @return {number}
+ */
+RecentCounter.prototype.ping = function(t) {
+    if (t === null) return null;
+    if (t > 3000) {
+        let delta = t - 3000;
+       while (this.pings.length > 0 && this.pings[0] < delta) {
+            this.pings.shift();
+        } 
+    }
+        
+    this.pings.push(t);
+    return this.pings.length;
+};
+
+/** 
+ * Your RecentCounter object will be instantiated and called as such:
+ * var obj = new RecentCounter()
+ * var param_1 = obj.ping(t)
+ */