SAP中types和data的区别
1.TYPES与DATA区别:
TYPES是用来自定义某种类(型)的,需(用DATA语句)实例化以后才可以使用
DATA 是用来声明基本类型数据对象(实例变量)的,对于用DATA直接定义的结构体对象(不参照其它结构类型)
参照自定义类型生成新数据语法格式如下:
TYPES | DATA ...... TYPE type1 ....... 'type1 代表程序内部类型
参照程序中已经声明的数据对象生成新数据语法格式如下:
TYPES | DATA ...... LIKE dobj ...... 'dobj代表数据对象
2.TYPE与LIKE区别:
TYPE后面跟随的只能是某种类(型)
LIKE后面可以跟实例对象
参照结构体对象生成内表时只能用LIKE,不能用TYPE,因为结构体对象不是类型,只是一种实例对象
参照结构类型生成内表时可以用LIKE也可以用TYPE
其中通过LIKE定义的内表直接拥有参照结构类型的元素结构,
而通过TYPE定义的内表只能间接拥有被参照结构类型的元素结构,结构类型不能作为内表的工作区,只有结构体对象才可以.
简单理解,types就是一个类型,一个框架。
data则是对这个types的东西进行了初始化,即分配内存和初始值。
帮忙解释下c#里public ConstructorInfo GetConstructor(Type[] types)是什么意思
只是定义了一个方法。
ConstructorInfo是返回值类型, GetConstructor是方法名,最后的是参数,Type[]指参数类型,types是变量。
在调用时,就会有类似这样的代码:
Type[] types = new Type[]{typeof(string),typeof(int)};
ConstructorInfo _c = GetConstructor(types);
types of transportation是什么意思
types of transportation
运输的种类
短语
The cost types of transportation 运输成本的类别
双语例句 权威例句
1.
They also summon taxis or other types of transportation, and in many hotels theycarry baggage from the street into the lobby.
他们也召唤出租车或其他交通工具,并且在许多宾馆,他们把行李从路边运进大堂。
2.
This week we have been working on transportation. We learned many differenttypes of transportation such as: ambulance, boat, bus, car, helicopter, plane,truck, and train. 跟读
这周我们主要学习的是交通工具,我们学习了许多种交通工具:救护车,船,公共汽车,汽车,直升飞机,飞机,卡车和火车。
3.
Lifting platform can be fitted with different types of transportation equipment andtransportation patible with the import and export, so that theprocess of fully automated transmission. 跟读
升降平台上可装上不同种类的输送设备,并与出入口输送设备相配合,使输送过程实现完全自动化。
types electronic commerce
Involved in the transaction by the target classification
(1) Business and consumer merce between the B to C
This is the direct involvement of consumers use the in the form of economic activity, similar mercial electronic retail business.
(2) business-to-business merce B to B
B to B merce application form is the most important and most enterprises in the form of attention.
(3) Business and government merce B to G
This business enterprises and anizations covering the various issues.
(4) between the consumers and consumer merce C to C
Personal use of the for transactions.
(5) between the government and consumer merce C o G
“Type”怎么读?
type英[ta?p]美[ta?p]n.类型;铅字;(印刷或打印的)文字;于…类型的vt.& vi.打字vt.[医学]测定(血型);按类型把…归类;成为…的典型;[印刷]浇铸