identifiers

简明释义

英[aɪˈdentɪfaɪəz]美[aɪˈdentəˌfaɪərz;aɪˈdentɪfaɪə

n. [计][图情]标识符；标示符；识别码（identifier 的复数）

英英释义

单词用法

同义词

反义词

例句

1.The individual item states are each given unique state identifiers.

各个项状态被赋予唯一的状态标识符。

2.The key is the use of unique identifiers.

关键就是使用唯一标识符。

3.Message keys contain product identifiers

消息键包含产品标识符

4.Next there are six JDBC identifiers.

接下来有六个JDBC标识符。

5.The implementation must return one of the given logical slice identifiers.

该实现必须返回一个给定的逻辑片标识符中。

6.One of an employee's unique identifiers inside IBM is their email address.

员工在IBM内部的一个唯一标识符是他们的电子邮件地址。

7.In programming, variable names often serve as identifiers 标识符 for data stored in memory.

在编程中，变量名通常作为标识符 identifiers 用于存储在内存中的数据。

8.Each user account is assigned a unique identifier 标识符 to ensure security.

每个用户账户都会被分配一个唯一的标识符 identifier 以确保安全性。

9.In web development, HTML elements can have identifiers 标识符 to enable CSS styling.

在网页开发中，HTML元素可以有标识符 identifiers 以启用CSS样式。

10.API calls often require specific identifiers 标识符 to access certain resources.

API调用通常需要特定的标识符 identifiers 来访问某些资源。

11.Databases use primary keys as identifiers 标识符 for each record.

数据库使用主键作为每条记录的标识符 identifiers 。

作文

In the realm of programming and data management, the term identifiers refers to names used to identify variables, functions, arrays, or other entities within a program. These identifiers serve as a means for programmers to reference data in a meaningful way. For example, when writing a function to calculate the area of a rectangle, a programmer might use identifiers like 'length' and 'width' to represent the dimensions of the rectangle. This practice not only enhances code readability but also makes it easier to maintain and debug. The importance of identifiers goes beyond mere naming conventions. They play a crucial role in ensuring that the code is understandable and logical. When identifiers are chosen wisely, they can convey the purpose of the variable or function at a glance. For instance, using 'calculateArea' as an identifier for a function that computes the area of a shape immediately informs the reader of its functionality. On the contrary, vague identifiers like 'x' or 'temp' can lead to confusion, making it difficult for others (or even the original programmer) to understand the code later on.Moreover, identifiers must adhere to certain rules and conventions set by the programming language being used. Most languages require that identifiers begin with a letter or an underscore, followed by letters, numbers, or underscores. This structure ensures that the code remains syntactically correct and reduces the likelihood of errors during compilation or execution.Another vital aspect of identifiers is their scope. The scope of an identifier determines where it can be accessed within the code. Local identifiers are accessible only within the block of code where they are defined, while global identifiers can be accessed from anywhere in the program. Understanding the scope of identifiers is essential for managing memory effectively and avoiding conflicts in larger programs.In addition to programming, identifiers are also prevalent in databases. In this context, identifiers can refer to primary keys, which uniquely identify records in a table. A well-chosen primary key acts as a unique identifier for each entry, allowing for efficient data retrieval and manipulation. For example, a customer database might use customer ID numbers as identifiers to distinguish between different clients. This ensures that operations such as updates and deletions affect only the intended records, thereby maintaining data integrity.In conclusion, identifiers are fundamental components in both programming and data management. They provide a way to label and access data efficiently, enhance code readability, and ensure proper data handling in databases. As such, understanding how to create effective identifiers is a critical skill for anyone working in these fields. By choosing descriptive and appropriate identifiers, programmers and data managers can significantly improve the clarity and functionality of their work.

在编程和数据管理领域，术语identifiers指的是用于识别程序中的变量、函数、数组或其他实体的名称。这些identifiers作为程序员以有意义的方式引用数据的手段。例如，在编写一个计算矩形面积的函数时，程序员可能会使用identifiers如'length'（长度）和'width'（宽度）来表示矩形的尺寸。这种做法不仅提高了代码的可读性，还使得维护和调试变得更容易。identifiers的重要性超出了命名约定的范围。它们在确保代码易于理解和逻辑性方面发挥着至关重要的作用。当identifiers被明智地选择时，它们可以一目了然地传达变量或函数的目的。例如，使用'calculateArea'（计算面积）作为计算形状面积的函数的identifier，立即告知阅读者其功能。相反，模糊的identifiers如'x'或'temp'可能会导致混淆，使他人（甚至原始程序员）在后续理解代码时感到困难。此外，identifiers必须遵循特定的规则和约定，这些规则由所使用的编程语言设定。大多数语言要求identifiers以字母或下划线开头，后跟字母、数字或下划线。这种结构确保代码在语法上是正确的，并减少了编译或执行期间出错的可能性。identifiers的另一个重要方面是它们的作用域。identifiers的作用域决定了它们在代码中可以访问的地方。局部identifiers只能在定义它们的代码块内访问，而全局identifiers可以在程序的任何地方访问。理解identifiers的作用域对于有效管理内存和避免大型程序中的冲突至关重要。除了编程，identifiers在数据库中也很常见。在这种情况下，identifiers可以指主键，主键唯一标识表中的记录。精心选择的主键作为每个条目的唯一identifier，允许高效的数据检索和操作。例如，客户数据库可能会使用客户ID号码作为identifiers来区分不同的客户。这确保了更新和删除等操作仅影响预期的记录，从而保持数据的完整性。总之，identifiers是编程和数据管理中的基本组成部分。它们提供了一种有效标记和访问数据的方式，提高了代码的可读性，并确保数据库中的数据处理得当。因此，理解如何创建有效的identifiers是任何在这些领域工作的人必须掌握的关键技能。通过选择描述性和适当的identifiers，程序员和数据管理员可以显著提高他们工作的清晰度和功能性。