Rhino.ScriptRuntime.ElemIncrDecr C# (CSharp) Method

		public static object ElemIncrDecr(object obj, object index, Context cx, int incrDecrMask)
		{
			object value = GetObjectElem(obj, index, cx);
			bool post = ((incrDecrMask & Node.POST_FLAG) != 0);
			double number;
			if (value is Number)
			{
				number = System.Convert.ToDouble(((Number)value));
			}
			else
			{
				number = ToNumber(value);
				if (post)
				{
					// convert result to number
					value = WrapNumber(number);
				}
			}
			if ((incrDecrMask & Node.DECR_FLAG) == 0)
			{
				++number;
			}
			else
			{
				--number;
			}
			Number result = WrapNumber(number);
			SetObjectElem(obj, index, result, cx);
			if (post)
			{
				return value;
			}
			else
			{
				return result;
			}
		}