null set
美
英 
英汉解释
例句
If this information does not exist, then N =, the null set.
如果这个信息不存在,则N=空集。
For clearing a pool, the one taking a set (with null Set) should be used.
如果要清空一个池,就要使用那个接收集合的API(传入一个null集合)。
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。
If the form input field is not null, set the payload you receive as the widget value, as shown in Listing 14
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。
set empty set, null set Venn diagram union intersection universal set proper subset solution set
集合空集维恩图并集交集全集真子集解集有关代数,方程,不等式