null field
英 [nʌl fiːld]
美 [nʌl fiːld]
网络 空字段; 空域
双语例句
- By default, a column can contain a NULL value, but if you don't want that, you can append the "NOT NULL" postfix to the field definition.
默认情况下，列可以包含NULL值，但是，如果不想这样，可以在字段定义中附加“NOTNULL”后缀。 - In cases where the field was null, we could also add a message to the FacesContext directing the associated component to return navigation to the current page.
如果该字段为null，那么还可以在FacesContext中添加一条消息，指示相关组件返回到当前页。 - If a field in the prototype is "null," then that value matches against any value in the data store; otherwise, the values must match exactly.
如果原型中的字段值为“null”，则该值匹配数据存储中的任何值；否则的话，必须精确地匹配值。 - If the corresponding class, field, or method is not generic, a null value is passed when calling the method.
若相应的类、字段或方法非泛型，则在调用方法时将返回null值。 - If you try to persist an object whose@ Id annotated field is null, then Morphia autogenerates an ID value for you.
如果您试图持久保存对象（其@Id注释的字段为null），则Morphia会为您自动生成ID值。 - If null is passed into the second parameter, the default is true ( disable field).
如果向第二个参数传递null，那么此参数默认的值就是true（禁用字段）。 - In the quiescent state, the next field of the link node pointed to by the tail is always null; in the intermediate state, it is always non-null.
在静止状态时，尾指针指向的链接节点的next字段总为null，而在中间状态时，这个字段为非null。 - For items that have two paths to send, there is a null byte after the first path, and it is followed by the second path, with the pathlen field of the message being set to the total length.
对于有两个路径需要发送的项，那么在第一个路径之后有一个null字节，其后紧跟第二个路径，并且消息的pathlen字段被设置为总长度。 - We could add validation code to the register() method to determine whether the first-name field is blank or null.
我们可以在register（）方法中添加验证代码，以确定名字字段是否为null。 - The goal with validation is to avoid some simple errors, such as trying to put a NULL into a field that doesn't accept them.
验证的目标就是要避免一些简单错误，例如尝试将NULL放入不接受这种值的字段。 - Adding new instance field or renaming an existing one will cause existing objects to have it initialized to null
添加新的实例属性或重命名现有的实例属性时，现有的对象会把这个实例属性初始化为null - Must be able to handle null field name for backward compatibility.
必须能够处理向后兼容空字段的名称。 - This field is NULL when no charmap is selected, which typically happens when you create a new FT_Face object from a font file that doesn't contain a Unicode charmap ( which is rather infrequent today).
当没有字符表被选中时，该字段为NULL。这种情况在你从一个不含Unicode字符表的字体文件（这种文件现在非常罕见）创建一个新的FTFace对象时发生。 - A null field descriptor is the descriptor that forms the blank division in export.
一个空白字段描述符是在输出中形成空格的描述符。 - Check every field for NULL, and check every set, list, or map for EMPTY before you try to use it in any logic ( yes, even any error-checking logic).
在逻辑（甚至是验错逻辑）中使用代码前，核对每个字段NULL为，每个集合、明细表和映射EMPTY。 - Similarly, antimagic field does not hinder psionics, nor does null psionics field disrupt magic within its area.
类似地，“防魔法力场”无法阻碍灵能，而“反灵能力场”也无法妨害魔法。 - Reply-To line for the email message. If NULL, no Reply-To field will be used.
回复电子邮件行。如是零，将不用回复字符域。 - Research and Design of the Null Probe for Near Field Measurement
近场测量中零探头研究与设计 - The affection of the thermal to the differential laser gyro's null shift is analysed in this paper, some method of making the thermo effect more smaller is proposed, and the temperature field is measured by experiment.
本文简要分析了四频差动激光陀螺开机后热场的变化对零漂的影响（即陀螺的热效应），提出了一些克服热效应的方法，并测量了陀螺热场。 - An algorithm based on the control theory of partial differential equations is proposed. It is also shown that the Null field method originally developed in the problem of acoustic scattering can be used to solve the corresponding adjoint problem of the optimal problem.
提出基于偏微分方程控制方法的一种算法，并证明原用于处理散射问题的Null-fieldmethod可用来求解优化问题的随伴问题。 - Research on null value is an important field in relational database theory; it does not only have important theoretical values, but also has great practical values.
空值的研究是关系数据库领域的一个重要研究方向，具有重要的理论价值和应用价值。