Facade example for Map and Map or Timers

tshemsedinov · tshemsedinov · commit cfbdeb3fffbd · 2018-10-30T16:26:23.000+02:00
diff --git a/JavaScript/1-prototype.js b/JavaScript/1-prototype.js
@@ -0,0 +1,46 @@
+'use strict';
+
+// Facade for Map and Map or Timers
+
+const TimeoutCollection = function(timeout) {
+  this.timeout = timeout;
+  this.collection = new Map();
+  this.timers = new Map();
+};
+
+TimeoutCollection.prototype.set = function(key, value) {
+  const timer = this.timers.get(key);
+  if (timer) clearTimeout(timer);
+  const timeout = setTimeout(() => {
+    this.delete(key);
+  }, this.timeout);
+  this.collection.set(key, value);
+  this.timers.set(key, timeout);
+};
+
+TimeoutCollection.prototype.get = function(key) {
+  return this.collection.get(key);
+};
+
+TimeoutCollection.prototype.delete = function(key) {
+  const timer = this.timers.get(key);
+  if (timer) {
+    clearTimeout(timer);
+    this.collection.delete(key);
+    this.timers.delete(key);
+  }
+};
+
+TimeoutCollection.prototype.toArray = function() {
+  return [...this.collection.entries()];
+};
+
+// Usage
+
+const hash = new TimeoutCollection(1000);
+hash.set('uno', 1);
+setTimeout(() => {
+  hash.set('due', 2);
+  hash.set('tre', 3);
+  console.dir({ array: hash.toArray() });
+}, 1500);
diff --git a/README.md b/README.md
@@ -1,2 +1 @@
-# Facade
-Pattern Facade Implementations
+# Pattern Facade Implementations

Original file line number	Diff line number	Diff line change
`@@ -1,2 +1 @@`
`1`		`-# Facade`
`2`		`-Pattern Facade Implementations`
	`1`	`+# Pattern Facade Implementations`