The library is not required to check the value of the index. Using an index that is out of range is undefined and usually results in a serious run-time error.
标准库不要求检查索引值，所用索引的下标越界是没有定义的，这样往往会导致严重的运行时错误。
A simple example is shown in Listing 1, declaring a hash consisting of 6 attributes: a string, an integer, a Boolean, an undefined attribute, another hash, and a function.
清单1显示了一个简单的例子，它声明了一个包含6个属性的hash：一个字符串、一个整数、一个布尔值、一个未定义的属性、另一个hash和一个函数。
A sort of undefined longing crept upon them.
一种莫名的渴望爬上了他们的心头。
The undefined background also shows how Cecilia Beaux was influenced by the French Impressionists, who believed, like Beaux, in a personal rather than conventional approach to their subject matter.
这个不确定的背景也显示了塞西莉亚·波克斯是如何受到法国印象派画家的影响的，他们和波克斯一样赞同用个人而非传统的方法来处理主题对象。
They hold only one piece of data: a string, a number, the undefined value, a reference to another variable.
它只保存一段数据：一个字符串、一个数字、未定义的值以及对另一个变量的引用。
When a combination is not possible or not yet implemented, the row in the data pool is excluded and the test action is undefined.
当一个合并不可能或者还没有被实现时，数据池中的行将会被排斥，并且测试活动是未定义的。
What's really interesting about the Victorians is that it was all so undefined, which is a kind of freedom.
维多利亚时代的人真正有趣的一点是：一切都没有下定义，所以这是某种程度的自由。
So Dr Penrose found himself speculating one day about how a universe in which all particles had lost their mass through some as-yet-undefined process might look.
因此，彭罗斯博士想象存在于宇宙中的所有粒子以某种目前还不明确的方式失去质量的那一天，宇宙会是什么样子。
It works correctly with undefined values as well, whereas with warnings turned on, a regular expression match on an undefined value will print a warning.
该函数也会正确地处理未定义的值，尽管在警告打开时，常规表达式在匹配未定义的值时会输出警告信息。
"Late is a relative term, because we don't consider it late, because our time line is undefined," he said.
“晚只是相对而言，我们并不认为晚。因为我们并没有明确的时间限制，”他说道。
To be sure, thinkers - diplomats, scholars, writers - say the Russian blitz into Georgia represents a new world, but what kind of new world is undefined.
可以确信，思想家们——外交家们，学者们和作家们——认为俄国闪电进入格鲁吉亚代表一个新世界的诞生，但是那种类型的新世界还不确定。
A placeholder link is a link with an initially undefined target.
占位符链接就是与开始时未定义目标的链接。
Both countries are moving into a new and somewhat undefined future and need to work on whether they can define it in a parallel way.
两国都正在朝着全新但尚无定论的未来前进，能否以一种平行的方式界定未来？这值得双方努力。
Instead of checking for a default compound value, you can also catch the access to an undefined variable. E.g.
不用再检查默认的复合值，您也可以捕获对未定义变量的访问。
A violation of the rules of this specification; results are undefined.
破坏规范的规则，结果是不确定的。
If a value clause is not specified, the initial value of the item is undefined.
如果没有指定value子句，则表示没有定义该项的初始值。
Note also how it USES a — verbose option, how every option has a shortcut, and how the detailed printout of a search result shows undefined strings as (undefined) instead of just omitting them.
注意它如何使用——verbose选项，每个选项的快捷方式，以及搜索结果的详细输出如何将未定义字符串表示为(UNDEFINED)，而不是仅仅忽略它们。
In addition, because Perl is looking for a true value, it also ignores undefined values without complaining about them. So we can rewrite the above into a single line.
另外，由于Perl正在寻找一个真值，因此它也可以忽略未定义的值，而不会抱怨这些值尚未定义。
The MQe_Script commands used in this section are provided as a full script later in this document along with any undefined variables.
在本部分使用的 MQe_Script命令以及未经定义的变量将在本文的后面作为完整的脚本提供。
If a portlet is undefined, such as 10 in the Rank column (Figure 15), you will not be able to input a mapping to that portlet in the ClearQuest profile mapping.
如果有一个入口没有定义，比如Rank栏目中的10(图15)，您将不能输入一个映射到ClearQues t概要文件映射中的中的入口。
All data in a CouchDB database is stored in a document, and each document can be made up of an undefined number of fields.
CouchDB数据库中的所有数据都储存在一个文档中，并且每个文档可以由未定义的字段组成。
spu_promote((unsigned int)5, 1) creates a vector of unsigned ints with 5 in the second element (element 1), and the remaining elements undefined.
spu_promote((unsignedint)5,1)创建了一个 unsignedint 类型的向量，其中第二个元素（元素 1）为 5，其他元素尚未定义。
Undefined population elements get a weight of zero so they won't be picked by the sample function that chooses the most likely cell for a particular grid position.
未定义的种群元素权重为0，所以，为特定网格位置选择最可能细胞的sample函数不会选择它。
The initialization of x_with_y() with a fallback (object,object) pattern is not necessary if you simply want undefined cases to raise an exception.
如果您只想在遇到未定义的情况时抛出异常，那么就没必要使用落后的 (object,object)模式对 x_with_y()进行初始化。
If you look at the Debug Messages pane, the answer is spelled out: The variable $multipler is undefined because it's a typo. It should be $multiplier.
如果看一下DebugMessages面板，答案就清楚了：变量 $multipler是未定义的，因为它是一个拼写错误，应该是 $multiplier。
Now, you can fake some of this and get it to work, but it is typically a bad idea because one minor slip and you can introduce undefined behavior.
现在，你就可以伪造一些这方面的工作，但它通常是一个坏主意，因为一个小单，你可以引入未定义的行为。
Now, you can fake some of this and get it to work, but it is typically a bad idea because one minor slip and you can introduce undefined behavior.
现在，你就可以伪造一些这方面的工作，但它通常是一个坏主意，因为一个小单，你可以引入未定义的行为。
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