June 2018 Update

Task/Respond-to-an-unknown-method-call/Julia/respond-to-an-unknown-method-call.julia

@@ -0,0 +1,13 @@
+function add(a, b)
+   try
+       a + b
+   catch
+       println("caught exception")
+       a * b
+   end
+end
+
+
+println(add(2, 6))
+println(add(1//2, 1//2))
+println(add("Hello ", "world"))

Task/Respond-to-an-unknown-method-call/Kotlin/respond-to-an-unknown-method-call.kotlin

@@ -1,18 +1,14 @@
-// Kotlin JS version 1.1.4-3
+// Kotlin JS version 1.2.0 (Firefox 43)
 
-class C  // class with no methods
+class C {
+    // this method prevents a TypeError being thrown if an unknown method is called
+    fun __noSuchMethod__(id: String, args: Array<Any>) {
+        println("Class C does not have a method called $id")
+        if (args.size > 0) println("which takes arguments: ${args.asList()}")
+    }
+}
 
 fun main(args: Array<String>) {
     val c: dynamic = C()  // 'dynamic' turns off compile time checks
-    try {
-        c.foo()  // the compiler now allows this call even though foo() is undefined
-    }
-    catch (t: Throwable) {
-        if (t.message == "undefined is not a function") {
-            println("Class C does not have a method called foo")
-        }
-        else {
-            println(t.message)
-        }
-    }
+    c.foo() // the compiler now allows this call even though foo() is undefined
 }