IS NULL

This tag determines whether or not the field in the name attribute is null.

这个标签确定name属性中的字段是否为空。

If that value is null, the project name is used.

如果此值为空，则使用项目名称。

The third tab in the Twitter panel, Following, first checks whether the following object is not null.

Twitter面板内的第三个选项卡是Following，它先是检查following对象是否为null。

Data is Null. This method or property cannot be called on Null values.

数据为空。不能对空值调用此方法或属性。

If this time is null, subscription is considered to be infinite.

如果这个时间为空，则认为订阅是无期限的。

If no errors occurred, then this parameter is NULL on output.

如果没有发生错误，那么这个参数在输出上是NULL。

Default value is null password.

默认值为空密码。

If doesn't exist or is NULL, set to and return.

如果不存在或者是NULL，就把设置为并返回。

It's handy because it saves testing whether the monitor is null before issuing a progress report.

它很方便，因为它省去了在发出进度报告之前测试监视器是否为空这一工作。

"ustlowts" is null, which indicates that statistics have never been run against this table.

“ustlowts”是空值，这说明了没有再次对该表进行这一统计。

Returns NULL if the wrong passphrase or authenticator information is used.

如果使用了错误的通行短语或验证器信息，则返回null。

Local predicates with inequality, LIKE, or IS NULL operators

带有不等式、LIKE或IS NULL操作符的本地谓词

If the Controller is null, then we try to instantiate it based on the type.

如果Controller是空的，那么我们就会基于它的类型进行实例化。

The event semaphore given to the driver is null.

给驱动程序的事件信号量是空的。

The async result object is null or of an unexpected type.

异步结果对象为空或属于意外类型。

How many times are you using the ternary operator to change the value of a variable if its content is null to assign it some default value?

你是否经常使用三目操作符来改变一个变量的值？

Next, check to make sure the username was entered and is not null.

然后，检查并确保输入的用户名不为null。

If the thread local username is null, then the_appUsername value is checked and it is used if it is not null.

如果线程本地用户名为空，则检查appUsername值并使用它（如果不为空）。

The first one asserts that the calculator instance object is not null, i.e.it exists.

第一个宣称这个计数器实例对象不是空，就像它实际存在一样。

When this parameter is null, Database Mail does not use authentication for this account.

如果此参数为null，则数据库电子邮件不对此帐户进行身份验证。

But as we hope we've shown in the table, that really represents an array with a single element whose value is null, not a null array.

但是，正如我们希望的，在表中已经显示，它真正表示的是含有单一元素的数组，元素的值为“零”（null），而不是一个“零”（null）数组。

If it is NULL, the dialog object's parent window is set to the main application window.

如果这个参数为空，对话框对象的父窗口被设置到应用程序主窗口。

Input file content passed to generator is null or empty.

至生器的入容null或是空的。

The procedure does not perform any action if the given table name is NULL.

如果给出的表名为NULL，则该过程不执行任何动作。

The notification class name is null for a notification class in the extended stored procedure.

扩展存储过程中某个通知类的名称为null。

Items that could not be found ( their price is NULL) can be filtered out.

对于不能找到的产品（价格为NULL），可以将其过滤掉。

Is null if there is no other individual owner.

如果没有其他单个所有者，则为null。

A dynamical system is null if its sequence entropy is zero for any sequence.

系统称为null的，如果对任意序列，它的序列熵为零。

We ameliorate the D_timetable algorithm, add to it merged list and null event, the practicability of the algorithm is improved.

我们在应用中对算法进行了一些改进，增加了矩阵化简过程中的合并链和空事件，提高了算法的实用性。

This routine initially checks if the interface handle is NULL.

这个例程首先检查接口句柄是否为NULL。