访问对象

Once you have inserted a null into the container, you must always check if the value is null before accessing the object

一旦你向容器插入了一个 null，你就必须在访问该对象前检查它是否为 null

This system makes full use of VEP, SQL data base technique and GRID/REPORT data output function.

该系统充分利用了VFP提供的面向对象的特征、SQL数据库访问技术和GRID/REPORT数据输出功能。

The get call can allow for more parallel access to the Managed Object from multiple tasks.

调用get方法允许多样任务中更多的对管理对象进行并行的访问。

I got a simple solution using abstract classes as it was not possible to access the user defined methods in the Parent object.

我得到一个简单的解决方案，使用抽象类，因为它无法访问用户定义的父对象的方法。

Objects in the vector are not named. Instead, they can be accessed by their position in the vector.

vector 中的对象是没有命名的，可以按 vector 中对象的位置来访问它们。

Distributed Component Object Model technology was used to design function components and their encapsulation so as to realize integration of function modules in the system. Information promulgator and visitor were employed to achieve the integration between the system and outer environment by the Web Services standard interface.

应用分布式组件对象模型的组件技术设计了功能构件，并加以封装以实现系统内各功能模块的集成；系统与外部环境集成采用基于标准Web服务接口的方式，通过设置信息访问器和发布器来实现。

For more information about how to create and use a refresher object in C++, see Accessing Performance Data in C++.

有关如何创建和使用在C ++对象的复习资料，请访问在C ++的性能数据。

Based on the research and analysis of the management mode and characteristic of Jiaying university laboratory, in order to get better retractility and applicability, the paper develops the laboratory MIS using object-oriented technique and modularizing design method, based on the three-tier architecture with COM+ Windows DNA, and combining the B/S mode with the C/S mode of Windows.

本论文在调研和分析嘉应学院实验室管理模式的基础上，针对实验室管理的特点，采用面向对象技术和模块化设计方法，应用先进的基于COM+的Windows DNA三层设计思想和软件工程方法，在局域网上实现WEB访问的B／S模式和WINDOWS界面的C／S模式相结合的三层分布式的实验室管理信息系统，解决目前实验室管理软件缺乏应有的伸缩性和互通性问题。

Some of these functions return match objects with which you can access saved group matches.

这些操作中的一部分返回匹配到的对象，你可以通过组匹配访问它们，15章的整章内容都是讲述正则表达式。

This paper covered basic mechanism and implementation technology of Object Request Broker security service in CORBA system, of which the key components are authentication, secure invocation and access control.

对象请求代理安全服务的核心是身份验证、安全调用与访问控制。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。