ListToGroup映射仅可用于列表，它通过仅保留列表的第一个项目将列表转化成一个组。
The List To Group projection can only be used for lists, and it turns the list into a group by retaining only the first item of the list.
不过，与filter不同的是，map通常保留列表的每个元素，使用对每个值应用代码得到的结果替换这些值。
But, unlike filter , a map always keeps every element of a list, replacing each value with the result of evaluating the code on that value.
保留一张你“最爱出错”的词语列表，仅当你使用这些词语的时候，用一下搜索命令。
Keep a list of your "favorite mistakes" and use the search command to see if and when you used them.
例如，您的应用程序可能会在与远程服务器交换订单信息时，将产品列表保留在本地缓存中。
For instance, your application might keep a list of products in local cache while exchanging order information with remote server.
由于与本讨论不相关的许多理由，需要保留该列表并以那种格式加以维护，以在可以预见的未来使用。
For many reasons that are irrelevant to this discussion, the list will remain and be maintained in that format for the foreseeable future.
当这个匹配列表和可利用机器加载之后，选择您想要保留的机器旁的复选框。
After the list of matching and available machines loads, select the check box next to the machines that you want to reserve.
保留一份支持的浏览器列表(及其版本号)。
Keep a list of the browsers (and their version Numbers) you support.
为了保留曲目的顺序，所以曲目列表是一个序列。
The track list is a sequence in order to preserve the track order.
运行队列的前 100 个优先级列表保留给实时任务使用，后 40 个用于用户任务（参见图1）。
The first 100 priority lists of the runqueue are reserved for real-time tasks, and the last 40 are used for user tasks (see Figure 1).
在调试样式表的时候，在屏幕上保留错误列表将会更方便。
When debugging a style sheet, it's more convenient to retain a list of errors on the screen.
您应该保留一个您的平台适用的潜在优化列表，并在每次需要改善应用程序的性能时浏览整个列表。
Keep a list of potential optimizations that apply to your platform and look through the entire list every time you need to improve the performance of an application.
在将一个列表转化成一个组时，只有列表的第一个项目被保留。
When a list is converted to a group, only the first item of the list is retained.
一个是一般性问题：创建多个实例属性或静态列表元素来保留每个数据值。
One is the mundane matter of creating multiple instance attributes or static list elements to hold each of the data values.
尽管前面已经说过，我还是将“Account”暂时保留在列表中以备帐户上的某些操作出现。
The foregoing notwithstanding, I'll keep "account" in the list for the time being in case some operation on an account surfaces.
CriteriaQuery被传递给一个可执行查询并保留类型信息，这样可以直接访问选择列表的元素，而不需要任何运行时强制类型转换。
CriteriaQuery is transferred to an executable query with its type information preserved so that the elements of the selected list can be accessed without any run-time casting.
表示中没有使用专门的python类——只使用了元组、字典、列表和字符串(以及保留位置上的None)。
No specialized Python classes are used in the representation — just tuples, dicts, lists, and strings (and None in the reserved position).
因为Select方法对参数进行了重写，所以调用者在把每一个列表传入Select方法之前必须要保留一个备份。
Because Select overwrites its arguments, the caller must make a copy of each list before passing it to Select .
geterrandlisthtmlview生成将列表中每个差事显示为表中一行的HTML，并保留HTML表直到需要该表时。
GetErrandListHTMLView generates the HTML to display each errand in the list as a row in a table, and holds the HTML table until needed.
Digg和Amazon都一样，只为移动用户保留了核心功能——Digg的新闻列表，Amazon的搜索功能。
Both Digg and Amazon have been reduced to their core functionality for mobile users - the list of top stories for Digg, search for Amazon.
还有一个步骤尚未完成（步骤 5），此步骤将执行realserver的活动监控（因此保留一个动态Apache节点列表，其中的节点可以为工作请求提供服务）。
There is one more step needed (Step 5) to perform active monitoring of the realservers (thus keeping a dynamic list of which Apache nodes are eligible to service work request).
把她保留在我的邮件列表上，并不会花费我任何东西。
这是一个在项目早期显示风险列表是项目的一个普通实践，尽管很少项目在整个项目生命周期中保留这份列表。
It is a common practice for projects to develop a risk list early in the project, though fewer projects maintain this list over the full project lifecycle.
例如，清单32展示了如何获得列表中的前两个元素，同时保留其余元素。
For example, Listing 32 shows how to get the first two elements from a list while retaining the remainder.
除了本文已经介绍过的优化外，我还将以下各项保留在我的列表中。
In addition to the optimizations that this article has already covered, I keep the following items on my list.
这会限制在创建和编辑视图中创建字段，但仍然在列表中保留字段并显示视图。
This suppresses the creation of fields in the create and edit views but still leaves the fields in the list and show views.
以色列表示有保留地接受该报告。
当使用RUP中具体化的迭代开发方法时，项目经理保留着一个按照出现和影响可能性排列的风险列表。
When using the iterative development approach embodied in RUP, the project manager maintains a list of risks sorted by likelihood of occurrence and impact.
当你正准备缩减你“宏大”的信息列表时，你应该确保留下了最重要的内容。
When it comes time to narrow down your giant list of accomplishments, you'll want to make sure you're including the most important stuff.
当你正准备缩减你“宏大”的信息列表时，你应该确保留下了最重要的内容。
When it comes time to narrow down your giant list of accomplishments, you'll want to make sure you're including the most important stuff.
应用推荐