/// <summary>
/// 15.4.4.9
/// </summary>
/// <param name="target"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public JsInstance Shift(JsDictionaryObject target, JsInstance[] parameters)
{
if (target.Length == 0)
{
return(JsUndefined.Instance);
}
JsInstance first = target[0.ToString()];
for (int k = 1; k < target.Length; k++)
{
JsInstance result = null;
string from = k.ToString();
string to = (k - 1).ToString();
if (target.TryGetProperty(from, out result))
{
target[to] = result;
}
else
{
target.Delete(to);
}
}
target.Delete((target.Length - 1).ToString());
if (length != int.MinValue)
{
length -= parameters.Length;
}
return(first);
}
public JsInstance SetLengthImpl(JsInstance target, JsInstance[] parameters)
{
int length = (int)parameters[0].ToNumber();
if (length < 0 || double.IsNaN(length) || double.IsInfinity(length))
{
throw new JsException(Global.RangeErrorClass.New("invalid array length"));
}
JsDictionaryObject array = (JsDictionaryObject)target;
if (length < array.Length)
{
int oldLength = array.Length;
for (int i = length; i < oldLength; i++)
{
array.Delete(i.ToString());
}
}
else
{
for (int i = array.Length; i < length; i++)
{
array[i.ToString()] = JsUndefined.Instance;
}
}
return(parameters[0]);
}
public JsInstance Shift(JsDictionaryObject target, JsInstance[] parameters)
{
if (target.Length == 0)
{
return((JsInstance)JsUndefined.Instance);
}
JsInstance jsInstance = target[0.ToString()];
int num;
for (int index1 = 1; index1 < target.Length; ++index1)
{
JsInstance result = (JsInstance)null;
string index2 = index1.ToString();
num = index1 - 1;
string index3 = num.ToString();
if (target.TryGetProperty(index2, out result))
{
target[index3] = result;
}
else
{
target.Delete(index3);
}
}
JsDictionaryObject dictionaryObject = target;
num = target.Length - 1;
string index = num.ToString();
dictionaryObject.Delete(index);
num = target.Length--;
return(jsInstance);
}