Add delete to type_array

otto_test.go

@@ -1262,9 +1262,9 @@ func TestArray(t *testing.T) {
 	test := runTest()
 
 	test(`
-		abc = ""+[0, 1, 2, 3]
-		def = [].toString()
-		ghi = [null, 4, "null"].toString()
+		abc = ""+[0, 1, 2, 3];
+		def = [].toString();
+		ghi = [null, 4, "null"].toString();
 	`)
 	test("abc", "0,1,2,3")
 	test("def", "")
@@ -1272,6 +1272,12 @@ func TestArray(t *testing.T) {
 	test(`new Array(0).length`, "0")
 	test(`new Array(11).length`, "11")
 	test(`new Array(11, 1).length`, "2")
+
+	test(`
+        abc = [0, 1, 2, 3];
+        delete abc[1];
+        abc;
+    `, "0,,2,3")
 }
 
 func TestArray_toString(t *testing.T) {

type_array.go

@@ -117,7 +117,7 @@ func (self *_arrayStash) property(name string) *_property {
 	if name == "length" {
 		return &_property{
 			value: toValue(len(self.valueArray)),
-			mode:  0100, // +Write -Enumerate -Configure
+			mode:  0100, // +w-ec
 		}
 	}
 
@@ -130,7 +130,7 @@ func (self *_arrayStash) property(name string) *_property {
 		}
 		return &_property{
 			value: value,
-			mode:  0111, // +Write +Enumerate +Configure
+			mode:  0111, // +wec
 		}
 	}
 
@@ -148,3 +148,19 @@ func (self *_arrayStash) enumerate(each func(string)) {
 	}
 	self._stash.enumerate(each)
 }
+
+func (self *_arrayStash) delete(name string) {
+	// length
+	if name == "length" {
+		return
+	}
+
+	// .0, .1, .2, ...
+	index := stringToArrayIndex(name)
+	if index >= 0 {
+		if index < int64(len(self.valueArray)) {
+			self.valueArray[index] = emptyValue()
+		}
+	}
+
+}