add toArray(), toJSON, and toString() functions

index.js

@@ -51,6 +51,41 @@ ArrayIndex.prototype.__set__ = function () {
   throw new Error('you must implement the __set__ function')
 }
 
+/**
+ * Converts this array class into a real JavaScript Array. Note that this
+ * is a "flattened" array and your defined getters and setters won't be invoked
+ * when you interact with the returned Array. This function will call the
+ * getter on every array index of the object.
+ *
+ * @return {Array} The flattened array
+ * @api public
+ */
+
+ArrayIndex.prototype.toArray = function toArray () {
+  var i = 0, l = this.length, array = new Array(l)
+  for (; i < l; i++) {
+    array[i] = this[i]
+  }
+  return array
+}
+
+/**
+ * Basic support for `JSON.stringify()`.
+ */
+
+ArrayIndex.prototype.toJSON = function toJSON () {
+  return this.toArray()
+}
+
+/**
+ * toString() override. Use Array.prototype.toString().
+ */
+
+ArrayIndex.prototype.toString = function toString () {
+  var a = this.toArray();
+  return a.toString.apply(a, arguments)
+}
+
 /**
  * Getter for the "length" property.
  * Returns the value of the "__length" property.

test.js

@@ -69,3 +69,8 @@ assert.equal(30, a[10])
 
 // test "length"
 assert.equal(11, a.length)
+
+a[4] = 20
+a[6] = 5.55432
+var b = [0, 1, 2, 3, 80, 5, 33.325919999999996, 7, 8, 9, 30]
+assert.equal(JSON.stringify(b), JSON.stringify(a))