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1·Listing 2. Proper handling of the read API function return value.

清单2 .适当处理read api函数的返回值。

2·Literally, return the control from this function, and take the value of the next expression, and return that as the value of the whole computation.

正如字面意义上说的，从这个函数返回，然后取得下一个表达式的值，并把这个值作为整个计算的结果返回。

3·The return value of any function is the result of the last expression in that clause (in our examples there is only one line).

任何函数的返回值都是子句(在我们的示例中只有一行)中最后一个表达式的结果。

4·Values of these types can come from the input document of a transformation, if schema awareness is in effect (see Schema awareness further ahead), or as the return value of a function.

如果启用了模式感知（参阅后面的 模式感知），这些类型的值可以来自转换的输入文档或者函数的返回值。

5·A callback function is passed to the method when it is invoked to capture the return value.

当该方法被调用来获取返回值时，一个回调函数会传递给此方法。

6·This function, though, does not return the value of the attribute; instead, it returns an integer request ID.

但是，该函数并不返回属性的值；相反，它返回一个整数请求ID。

7·Tracing of exit/return value of a function is possible by applying trace hook at exit point and specifying function prototype.

通过在出口点应用跟踪钩子并指定函数原型，可以探测函数的退出/返回值。

8·If the method on the server-side component has a non-void return value, that value is passed into the callback function as its only argument.

如果服务器端组件上的方法具有非空返回值，该值就会作为其惟一的实参传递进此回调函数。

9·When the server receives the request from the client, the server executes the local function and returns the return value for the function to the client.

当服务器从客户端收到请求后，服务器执行本地函数，并将该函数的返回值返回给客户端。

10·For each ODBC function invoked, a special value known as a return code is returned to the calling application.

对于每个被调用的odbc函数，都要向调用它的应用程序返回一个值，该值就是所谓的返回代码。