for (var i = len - del_count; i > start_i; i--) {
var from_index = i + del_count - 1;
var to_index = i + num_additional_args - 1;
- // The spec could also be interpreted such that
- // %HasOwnProperty would be the appropriate test. We follow
- // KJS in consulting the prototype.
- var current = array[from_index];
- if (!IS_UNDEFINED(current) || from_index in array) {
- array[to_index] = current;
+ if (from_index in array) {
+ array[to_index] = array[from_index];
} else {
delete array[to_index];
}
for (var i = start_i; i < len - del_count; i++) {
var from_index = i + del_count;
var to_index = i + num_additional_args;
- // The spec could also be interpreted such that
- // %HasOwnProperty would be the appropriate test. We follow
- // KJS in consulting the prototype.
- var current = array[from_index];
- if (!IS_UNDEFINED(current) || from_index in array) {
- array[to_index] = current;
+ if (from_index in array) {
+ array[to_index] = array[from_index];
} else {
delete array[to_index];
}
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
-var a = [1, 2, 3];
-Object.defineProperty(a, '1', {
- get: function() { delete this[1]; return undefined; },
- configurable: true
-});
+function newArrayWithGetter() {
+ var arr = [1, 2, 3];
+ Object.defineProperty(arr, '1', {
+ get: function() { delete this[1]; return undefined; },
+ configurable: true
+ });
+ return arr;
+}
+
+var a = newArrayWithGetter();
var s = a.slice(1);
assertTrue('0' in s);
// Sparse case should hit the same code as above due to presence of the getter.
-a = [1, 2, 3];
+a = newArrayWithGetter();
a[0xffff] = 4;
-Object.defineProperty(a, '1', {
- get: function() { delete this[1]; return undefined; },
- configurable: true
-});
s = a.slice(1);
assertTrue('0' in s);
+
+a = newArrayWithGetter();
+a.shift();
+assertTrue('0' in a);
+
+a = newArrayWithGetter();
+a.unshift(0);
+assertTrue('2' in a);