undefined

简明释义

英[ˌʌndɪˈfaɪnd]美[ˌʌndɪˈfaɪnd]

adj. 不明确的；未下定义的

英英释义

单词用法

同义词

反义词

例句

1.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。

2.But that, of course, is the whole trouble when greatness, undefined, is made into an objective in its own right.

但那当然是全部问题，当未被定义的伟大被当做目标。

3.Remember that currently your WSDL has an undefined location address.

请记住，目前您的WSDL具有一个未定义的位置地址。

4.It defines just enough to let you declare an injection point, with qualifiers, and then leaves the rest undefined.

它只定义了带有修饰符的注入点而已，其他的都没有定义。

5.The method XXX is undefined for the type yyy.

xxx方法对于类型yyy来说定义不明确。

6.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。

7.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。

8.Note how Perl distinguishes between undefined and empty (length 0) strings.

注意Perl如何区分未定义的串和空串(长度是0)。

9.Prefixes can be set to different URIs, but cannot be undefined, at least for XML 1.0 documents.

可以将前缀设置成不同的URI，但不能取消定义，至少对XML 1.0文档是这样。

10.When the function was called without parameters, it returned undefined.

当函数在没有参数的情况下被调用时，它返回了未定义。

11.The variable in the code is undefined, which means it has not been assigned a value.

代码中的变量是未定义的，这意味着它尚未被赋值。

12.An undefined reference in programming can lead to runtime errors.

编程中的未定义引用可能导致运行时错误。

13.In mathematics, dividing by zero results in an undefined value.

在数学中，除以零会导致一个未定义的值。

14.The term 'undefined behavior' refers to code that can produce unpredictable results.

'未定义行为'这个术语指的是可能产生不可预测结果的代码。

作文

In the realm of mathematics, the term undefined refers to a value or expression that does not have a meaningful definition. For instance, when we attempt to divide a number by zero, the result is undefined. This concept can be perplexing for students who are just beginning to explore the world of algebra and calculus. Understanding why certain operations lead to an undefined result is crucial for building a solid foundation in mathematics.The idea of undefined extends beyond mathematics into various fields, including computer science and philosophy. In programming, an undefined variable signifies that a variable has been declared but has not yet been assigned a value. This can lead to errors if the variable is used in calculations or processes without being initialized. Therefore, programmers must ensure that their variables are properly defined before use to avoid the pitfalls associated with undefined values.Moreover, in philosophical discussions, the term undefined can describe concepts that lack clear boundaries or definitions. For example, the notion of happiness can be considered undefined because it varies significantly from person to person. What brings joy to one individual might not resonate with another, making happiness a subjective experience that eludes a singular definition.In everyday life, we often encounter situations where things feel undefined. For instance, during times of uncertainty, such as a global pandemic or economic crisis, people may feel a sense of confusion and lack of direction. The future becomes undefined, filled with possibilities that are hard to predict. This feeling can lead to anxiety, as individuals grapple with the ambiguity of their circumstances.To cope with the undefined aspects of life, it is essential to develop resilience and adaptability. Embracing uncertainty allows us to navigate through challenges more effectively. By acknowledging that some things will always remain undefined, we can focus on what we can control—our reactions, our choices, and our mindset.In conclusion, the term undefined carries significant weight across various domains. Whether in mathematics, programming, philosophy, or daily experiences, understanding the implications of undefined helps us navigate complexities and uncertainties. By learning to accept and manage the undefined elements of our lives, we can find clarity and purpose even in the most chaotic situations. It is this journey of seeking meaning amidst the undefined that ultimately enriches our lives and broadens our perspectives.

在数学领域，术语undefined指的是一个没有有意义定义的值或表达式。例如，当我们试图将一个数字除以零时，结果是undefined。这个概念对刚开始探索代数和微积分世界的学生来说可能会令人困惑。理解为什么某些操作会导致undefined结果对于建立坚实的数学基础至关重要。undefined的概念不仅限于数学，还扩展到计算机科学和哲学等多个领域。在编程中，undefined变量表示一个变量已经被声明但尚未被赋值。如果在未初始化的情况下使用该变量进行计算或处理，可能会导致错误。因此，程序员必须确保在使用之前正确地定义他们的变量，以避免与undefined值相关的陷阱。此外，在哲学讨论中，术语undefined可以描述缺乏清晰边界或定义的概念。例如，幸福的概念可以被认为是undefined，因为它在每个人之间差异巨大。给一个人带来快乐的事情可能不会引起另一个人的共鸣，使得幸福成为一种主观体验，难以用单一的定义来描述。在日常生活中，我们经常会遇到感觉undefined的情况。例如，在全球疫情或经济危机等不确定时期，人们可能会感到困惑和缺乏方向。未来变得undefined，充满了难以预测的可能性。这种感觉可能导致焦虑，因为个人努力应对自己境况的模糊性。为了应对生活中undefined的方面，培养韧性和适应能力至关重要。接受不确定性使我们能够更有效地应对挑战。通过承认某些事物将始终保持undefined，我们可以专注于我们能够控制的事情——我们的反应、我们的选择和我们的心态。总之，术语undefined在各个领域具有重要意义。无论是在数学、编程、哲学还是日常经历中，理解undefined的含义帮助我们应对复杂性和不确定性。通过学习接受和管理生活中的undefined元素，我们可以在最混乱的情况下找到清晰和目标。正是这种在undefined中寻求意义的旅程最终丰富了我们的生活，拓宽了我们的视野。