September 2017 Update

Task/Associative-array-Creation/Gosu/associative-array-creation.gosu

@@ -0,0 +1,35 @@
+// empty map
+var emptyMap = new HashMap<String, Integer>()
+
+// map initialization
+var map = {"Scott"->50, "Carson"->40, "Luca"->30, "Kyle"->38}
+
+// map key/value assignment
+map["Scott"] = 51
+
+// get a value
+var x = map["Scott"]
+
+// remove an entry
+map.remove("Scott")
+
+// loop and maps
+for(entry in map.entrySet()) {
+  print("Key: ${entry.Key}, Value: ${entry.Value}")
+}
+
+// functional iteration
+map.eachKey(\ k ->print(map[k]))
+map.eachValue(\ v ->print(v))
+map.eachKeyAndValue(\ k, v -> print("Key: ${v}, Value: ${v}"))
+var filtered = map.filterByValues(\ v ->v < 50)
+
+// any object can be treated as an associative array
+class Person {
+  var name: String
+  var age: int
+}
+// access properties on Person dynamically via associative array syntax
+var scott = new Person()
+scott["name"] = "Scott"
+scott["age"] = 29