The best practice is not to pass an array with null elements between Web service clients and servers.
最佳的实例不是将含有空元素的数组传递到Web服务的客户端及服务器上。
Weakly-typed collection objects, arrays containing null elements, and certain native data types all pose special problems for interoperability. Specifically
弱类型的集合对象、包含空元素的数组和特定的本地数据类型都给互操作性带来一定的问题，特别是
This may be in the form of Null values or other blank value conditions (for examples, Spaces) for one or multiple data elements of the entity.
对于实体的一个或多个数据元素，这可能以null值或空白值(例如空格)的形式出现。
Listing 2 shows an array constructor with four elements with values given by the NULL constant, a variable, a literal and a scalar sub-query, respectively.
清单2显示具有4个元素的阵列构造函数，其值分别由NULL常数、变量、文字和标量子查询提供。
the cardinality of phoneList is 10, and elements in positions 1 to 9 are NULL.
phoneList的基数为10，在位置1到9 中的元素为 NULL。
Otherwise, there can be confusion over whether an empty array is a null object, an array with no elements, or an array with a single object containing null or empty values.
否则，可能对一个空数组是null对象还是没有任何元素的数组，亦或带有一个对象且此对象包含null或空值的数组产生混淆。
More formally, sets contain no pair of elements e1 and e2 such that e1.equals (e2), and at most one null element.
更准确地说，set不包含成对的e1和e2元素，因此如果e1 .equals (e2)，那么最多包含一个null元素。
This tip addresses one of those cases: the distinction between an array which is null, and an array which has no elements.
这里介绍的技巧用于处理其中的一个情况：一个为“零”的数组和一个没有元素的数组之间的差别。
Even when XML includes optional elements, it's still possible to avoid the need for null values.
即使XML包含了可选因素，仍然可以避免使用null值。
Elements in positions 11 and up do not exist (note that this is not the same as being NULL). Therefore, a statement such as.
位置11以及更高位置中的元素都不存在(请注意这不同于NULL)。
All elements are permitted, including null.
支持所有元素，含空元素。
Based on this new method, a selective algorithm is introduced for the purpose of reducing the number of controlled elements for null steering, and increasing the robust of the system.
为了减少每次需要控制的阵元数，提高系统鲁棒性，在此基础上进一步提出了利用天线选择性幅值扰动形成零陷的方法。
Based on this new method, a selective algorithm is introduced for the purpose of reducing the number of controlled elements for null steering, and increasing the robust of the system.
为了减少每次需要控制的阵元数，提高系统鲁棒性，在此基础上进一步提出了利用天线选择性幅值扰动形成零陷的方法。
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