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。
Entries within the feed are represented as array elements, making it possible to iterate over the feed and retrieve the individual contact entries.
提要中的条目被表示为数组元素，从而使得在提要上迭代和检索单个联系人条目成为可能。
For best performance, ensure that you get and update array elements in the largest sensible blocks.
要获取最佳的性能，应该确保以尽可能大的块的来获取和更新数组元素。
You'll also find some simplifications from C, which include string concatenation, associative array elements, and aggregation operators.
您还看到从C 语言带来的简化，其中包括字符串连接、关联数组元素和合并操作符。
This guarantees that no reallocation is necessary regardless of how many elements are added to the array later on and regardless of the size of those elements.
这可以保证稍后无论多少元素添加到阵列，也无论那些元素的大小，都没有必要重新分配。
The elements of the array will have named keys, associated with the elements and attributes of the RSS file read.
此阵列的元素将具有根据被读取的RSS文件的元素和属性命名的键。
During this parsing process, the elements and data in the configuration file are converted into key-value pairs, similar to that found in a PHP associative array.
解析过程中，配置文件中的元素和数据转化成类似PHP关联数组的键-值对。
The code in Listing 4 first defines an array, with the first element being the path to the binary that is to be executed, and the remaining elements acting as the command-line parameters.
清单4中的代码首先定义一个数组，其中第一个元素是要执行的二进制文件的路径，其余元素充当命令行参数。
Note that the subproblem method does not copy the elements; it merely copies the array reference and offsets into an existing data structure.
注意subproblem方法没有复制这些元素；它只是将数组引用和偏移复制到一个现有的数据结构中。
In this case, you see two DHTML techniques: the forms array, and calling elements by names based on attribute values, rather than by element names or by overall structure.
在这个例子中，使用了两个DHTML技术：forms数组，以及通过基于属性值的名称调用元素(而不是通过元素名或总体结构)。
The previous parameter is replaced by the result of the function, and this process is repeated with the next element in the array until all of the elements are used.
而previous参数之后会被此函数的结果替代，并且这个过程还会针对数组的下一个元素重复，直到所有元素都用完为止。
To maintain this separation, arrays are passed as opaque handles, and native code must call back to the JVM in order to manipulate array elements using set and get calls.
为了维持这种分离，数组将作为不透明的句柄传递，并且本机代码必须回调J VM以便使用set和get调用操作数组元素。
The line of perl says, "Read all input lines into an anonymous array , reverse the order of the elements, and print the new array."
包含perl的那行命令表示“将所有的输入行读入一个匿名数组()，颠倒元素的顺序，并打印这个新的数组”。
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。
It also provides three methods for accessing array elements: standard indexing, creating subarrays, and slicing, which produces a less dimensional view of an array segment.
它还提供三种访问数组元素的方法：标准索引、创建子数组和切片(slicing)，切片能产生维数更小的数组片段的视图。
Learn to understand the Perl notation for anonymous array references and dereferencing array elements.
学习理解匿名数组引用和解除数组元素引用的Perl符号。
The first article showed you how jQuery works functionally, and how you can use it to search for page elements, loop through them, and access them like any Array object.
本系列的第一篇文章向您展示了jQuery是如何工作的，以及如何用它来搜索页面元素、循环遍历这些元素并像Array对象那样访问这些元素。
You also need to count the number of elements in the array and use a variable $numstories to contain the result.
您还需要统计数组中的元素个数，并将其保存在变量 $numstories中。
The Drupal forms API allows you to define content before and after the XHTML generated for each form widget using the #prefix and #suffix array elements.
DrupalformsAPI允许使用 #prefix和 #suffix数组元素在为每个表单组件生成的XHTML之前和之后定义内容。
Node content is now stored in a structured array in the same way the form elements are stored in the form API structured array and is rendered using the drupal_render function.
节点内容现在存储在一个结构化数组中，存储方式与在FormAPI结构化数组中存储表单元素的方式相同，可以使用drupal_render函数显示节点内容。
The array mountains represents all of the checkboxes for the example, and the array selectedMountains represents the checked elements preselected to show in the browser.
数组mountains代表示例复选框的全部选项，数组selectedMountains 代表预选的在浏览器中显示为选中的元素。
Values for array type components can contain zero or one element, and values for set and tree type components can have zero or more elements.
用于数组类型的组件的值可以包含0个或1个元素，用于集合和树类型的组件的值可以包含0到多个元素。
Whatever elements you use within the bash shell, you will find a rich environment and an almost limitless array of customizations that you can use to improve your interaction and environment.
无论使用bashShell中的什么元素，您都会发现一个丰富的环境和几乎无限的自定义系列，您可以使用它们来改进您的交互和环境。
Good enough, but about all you can do with this structure is set and retrieve elements by individual (multi-dimensional) index. In contrast, a Numarray array is a bit more flexible.
很好，但是您对这种结构所能做的只是通过单独的(或者多维的)索引来设置和检索元素。
What we will store in this data variable is an array of two elements: a horizontal header name and a vertical header name of a cell.
我们将在该数据变量中储存包含两个元素的数组：单元格的水平标题栏名和垂直标题栏名。
Otellini, said in a statement: “With the rapid expansion of growth across a vast array of Internet-connected devices, more and more of the elements of our lives have moved online.
在一项声明中说到：“随着通过网络连接的设备的急速扩张和网络连接的不断膨胀，我们生活中越来越多的要素依赖在线服务。
Listing 8 shows an example of creating an array and then adding three elements to it.
清单8显示创建一个数组然后向其中添加3个元素的示例。
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。
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。
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