unordered

简明释义

英[ˌʌnˈɔrdərd]美[ˌʌnˈɔrdərd]

adj. 无序的

英英释义

单词用法

同义词

反义词

例句

1.The attributes are thus unordered.

因此，这些属性是无序的。

2.XML has the concept of unordered mapping for element attributes, but strict ordering for nested elements.

XML中存在这样的概念：对元素属性采用无序映射，而对嵌套元素使用严格的排序。

3.Note: In Python, sets are unordered collections of unique elements.

注意：在Python内，集是惟一元素的无序集合。

4.While the unordered set displays as.

而未排序的集显示如下。

5.Keyword search finds unordered sequences of words.

关键词搜索找到无序的单词系列。

6.DITA tasks also allow for unordered steps; this support does not yet exist in the migration utility.

DITA任务也允许使用无序步骤，但这在迁移工具中不受支持。

7.The results of the survey were presented in an unordered 无序的 list, making it hard to analyze.

调查结果以一个无序的列表展示，这使得分析变得困难。

8.He received an unordered 无序的 list of tasks that confused him.

他收到了一个无序的任务列表，这让他感到困惑。

9.The items were stored in an unordered 无序的 fashion on the shelf, which created a mess.

物品在架子上以无序的方式存放，这造成了一团糟。

10.In programming, an unordered 无序的 set does not maintain the order of elements.

在编程中，无序的集合不维护元素的顺序。

11.The unordered 无序的 arrangement of the books made it difficult to find what I needed.

书籍的无序的排列使我很难找到我需要的东西。

作文

In the world of data structures, understanding the concept of unordered collections is crucial for efficient programming. An unordered collection is a type of data structure that does not maintain any specific order of its elements. This means that when you iterate through an unordered collection, the order in which you access the elements may differ from the order in which they were added. Common examples of unordered collections include sets and dictionaries in programming languages like Python. The primary advantage of using unordered collections is their performance. Operations such as insertion, deletion, and membership tests can be performed in constant time, on average. This is because unordered collections often utilize hash tables to store their elements. For instance, when you add an element to a set, the hash function computes a unique index for that element, allowing for quick access later on. However, the unordered nature of these collections can also lead to some challenges. For example, if you need to maintain a specific sequence of items, using an unordered collection would not be appropriate. In such cases, ordered collections like lists or arrays might be more suitable. Additionally, the lack of order means that when you retrieve items from an unordered collection, you cannot assume any particular arrangement. This could lead to confusion if the ordering of elements is important for your application. Another aspect to consider is how unordered collections handle duplicate entries. In a set, for example, duplicates are automatically removed, which can be advantageous when you want to ensure that all elements are unique. However, this behavior might not be desired in all scenarios. If you need to keep track of multiple occurrences of an item, you would have to resort to using a different data structure, such as a list or a multiset.When working with unordered collections, it is essential to understand their limitations and strengths. For instance, while they are excellent for quick lookups and ensuring uniqueness, they do not provide any guarantees about the order of elements. This characteristic can significantly impact how you design your algorithms and data processing tasks.In conclusion, the term unordered refers to collections that do not maintain a specific order of elements. While they offer advantages in terms of performance and efficiency, they also come with trade-offs regarding ordering and duplicate handling. As a programmer, recognizing when to use unordered collections versus ordered ones is key to writing effective and optimized code. By mastering the concept of unordered collections, you can enhance your programming skills and improve the performance of your applications.

在数据结构的世界中，理解unordered集合的概念对于高效编程至关重要。unordered集合是一种不维护其元素特定顺序的数据结构。这意味着当你遍历一个unordered集合时，访问元素的顺序可能与它们被添加的顺序不同。常见的unordered集合示例包括Python等编程语言中的集合和字典。使用unordered集合的主要优点是它们的性能。插入、删除和成员测试等操作平均可以在常数时间内完成。这是因为unordered集合通常利用哈希表来存储其元素。例如，当你向集合中添加一个元素时，哈希函数计算该元素的唯一索引，从而允许稍后快速访问。然而，这些集合的unordered特性也可能导致一些挑战。例如，如果你需要保持项目的特定顺序，使用unordered集合就不合适。在这种情况下，有序集合如列表或数组可能更为合适。此外，由于缺乏顺序，当你从unordered集合中检索项目时，你不能假设任何特定的排列。这可能会导致混淆，如果元素的排序对你的应用程序很重要。另一个需要考虑的方面是unordered集合如何处理重复条目。例如，在集合中，重复项会自动被移除，这在你想确保所有元素都是唯一时是有利的。然而，这种行为在所有场景中可能并不理想。如果你需要跟踪某个项目的多个出现次数，你必须使用不同的数据结构，例如列表或多重集合。在使用unordered集合时，了解它们的局限性和优势至关重要。例如，虽然它们在快速查找和确保唯一性方面表现出色，但它们不提供任何关于元素顺序的保证。这一特性可能会显著影响你设计算法和数据处理任务的方式。总之，术语unordered指的是不维护元素特定顺序的集合。虽然它们在性能和效率方面提供了优势，但在顺序和重复处理方面也存在权衡。作为程序员，识别何时使用unordered集合与有序集合之间的区别是编写有效和优化代码的关键。通过掌握unordered集合的概念，你可以提升你的编程技能，改善应用程序的性能。