E210为空，但是日志数不为空。
确保对应的XML文档不为空。
用户名为空，密码不为空。
An empty value for user name and a non-empty value for password.
用户名不为空，密码为空。
A non-empty value for user name and an empty value for password.
确保新值不为空。
举个例子，假如需要确保一个表单内两个给定字段都不为空。
Take an example where you need to ensure that either of the two given fields in a form is not empty.
我观察到，在其他类似的应用程序，我有对象的值不为空。
I observed that in other similar application that I have the values of the objects aren't null.
如果消息不为空，则将内容添加到页面上的Dojo小部件。
If the messages are not empty, the content is added to the Dojo widgets on the page.
对于目录的情况，如果目录的内容不为空，则此例程将引发异常。
In the case of a directory, if the contents of the directory are not already empty, this routine throws an exception.
如果没有找到搜索字符串，并且参数都不为空，则所得的结果是0。
If the string to be searched is not found and neither argument is null, the result is 0.
在使用行和单元格这样的对象之前，一定要测试它们，确保它们不为空。
Before using objects like rows and cells, be sure to test them to make sure they are not null.
当您更改密码(家长控制)输入栏不为空：标记会加入到先前输入的密码。
When you change the password (for Parental Control profile) the entry field is not emptied: symbols are added to the previously entered password.
从第22行到第34行从上一步中获得的数组中选择一个不为空的操作系统。
In lines 22 through 34 you select an operating system that is not NULL from the list obtained in previous step.
如果某行不为空，则此设置对“复制”或“剪切”命令的行为无任何影响。
This setting has no effect on the behavior of Copy or Cut when a line is not blank.
如果表单输入字段不为空，将小部件的值设为接收到的负载，如清单14所示。
If the form input field is not null, set the payload you receive as the widget value, as shown in Listing 14.
数值压缩不为空值、可变长度列中的零长度数据和系统默认值提供磁盘空间。
Enabling value compression allows for no disk storage to be consumed by NULL values, zero length data in variable length columns and system default values.
如果行在添加单元格之后不为空，那么您可以在行循环的底部将它附加到根元素。
If the row isn't empty after adding cells, you can attach it to the root element at the bottom of the row loop.
这些实例变量不能重新设置，如果它们不为空，则用于为每个请求提供用户名和密码。
These instance variables are not reset and, if they are not null, are used to provide the username and password on every request.
如果值不为空，verify方法返回0，如果需要的字段的值没有输入，就返回1。
The verify method returns 0 if the value is not empty or 1 if the value of the required field has not been entered.
类似地，仍将检查线程本地密码，如果不为空，则使用它(并且在使用后重新设置为空)。
Similarly, the thread local password is checked and used if not null (and reset to null after use.)
如果status对象不为空，Django就会循环遍历每个status对象并显示相应的文本。
If the status object isn't empty, Django loops through each status object and displays the corresponding text.
如果客户编号不为空，即客户是已知客户，则遵循左侧的路径(2)，并从客户注册服务中检索客户数据(3)。
If the customer number is not null, that is, the customer is already known, the left hand path is followed (2), and the customer data is retrieved from the customer registration service (3).
该系统发送一个WM_PAINT消息到一个窗口时，它的更新区域不为空，并在该窗口的消息队列中没有其他消息。
The system sends a WM_PAINT message to a window whenever its update region is not empty and there are no other messages in the application queue for that window.
还有一个重点需要注意：在清单7中的以下代码行(在下面的清单8中断开)中，这段代码测试每个单元格，确保它们不为空。
One more important note: in the following lines of code from Listing 7, broken out in Listing 8 below, the code tests each cell to make sure it's not null.
这是十分基本的。这仅仅判断ISBN编号的值是否为空的，同时在导航栏上禁用除删除控件外的所有其它控件-如果ISBN编号不为空的话，启用全部控件。
Basically, this just determines whether or not the ISBN value is empty, and disables all of the viewer controls except Delete if so - otherwise, it enables them all.
如果transportTModelKey参数的值不为空，就添加一个传输类别 keyedReference ；它的值即是 transportTModelKey 参数的值。
If the value of the transportTModelKey parameter is not null, then a transport categorization keyedReference is added; its value is the value of the transportTModelKey parameter.
如果transportTModelKey参数的值不为空，就添加一个传输类别 keyedReference ；它的值即是 transportTModelKey 参数的值。
If the value of the transportTModelKey parameter is not null, then a transport categorization keyedReference is added; its value is the value of the transportTModelKey parameter.
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