null field

英 [nʌl fiːld]

美 [nʌl fiːld]

网络  空字段; 空域

计算机

双语例句

• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。