placeholder

简明释义

英[ˈpleɪshəʊldə(r)]美[ˈpleɪshoʊldər]

n. 占位符

英英释义

单词用法

同义词

反义词

例句

1.So declare as we'll say a variable, a placeholder called counter.

首先要定义一个名为counter的，变量。

2.Listing 9 contains the code to take this data and populate the placeholder.

清单9包含接受该数据并填充占位符的代码。

3.The link serves as a placeholder to show that there is something there to be documented.

这种链接被用作占位符，说明此处的内容将要被编写为文档。

4.An empty function as a placeholder for the code that will actually perform the desired work.

一个空的函数，它作为实际执行所需工作的代码的占位代码。

5.Step 1: Create placeholder classes.

步骤1：创建placeholder类。

6.The asterisk is a placeholder for supporting finer probe points in the future.

星号是一个占位符，用于在以后支持更细粒度的探测点。

7.An empty function as a placeholder for the code that will actually perform the desired work.

一个空的函数，它作为实际执行所需工作的代码的占位代码。

8.We added a placeholder in the document to indicate where the data should be inserted later.

我们在文档中添加了一个占位符，以指示数据应在何处插入。

9.The app uses a placeholder for user names until they are registered.

该应用程序使用一个占位符来表示用户名称，直到他们注册。

10.During the meeting, we created a placeholder for future agenda items.

在会议期间，我们为未来的议程项目创建了一个占位符。

11.In our web design project, we used a placeholder to represent where the images will go.

在我们的网页设计项目中，我们使用了一个占位符来表示图片将放置的位置。

12.The form included a placeholder text that showed users what information to enter.

表单中包含一个占位符文本，显示用户应该输入什么信息。

作文

In the world of technology and design, the term placeholder refers to a symbol or text that is used temporarily in a document or a user interface. It serves as a visual cue for where content will eventually be placed. For instance, when designing a website, a designer might use a placeholder image to indicate where a photograph will go once it is available. This allows the design process to continue without being stalled by the absence of actual images or text. The significance of placeholder elements cannot be understated, as they provide a clear structure and flow to the layout, enabling designers to visualize the final product even in its early stages.The concept of placeholder extends beyond just visual arts; it is also crucial in programming and coding. In many programming languages, a placeholder can be a variable that is assigned a temporary value before the final data is available. This allows developers to write and test code without needing all the final inputs up front. For example, a programmer might create a function that uses a placeholder variable to represent user input. Once the actual input is received, the placeholder is replaced with real data, making the code functional and dynamic.Moreover, the use of placeholder elements can enhance user experience in applications. When users see placeholder text in a form field, it guides them on what information is required. For instance, a search bar may contain placeholder text such as 'Search...' which indicates to the user that they can type their query there. This not only improves usability but also helps in reducing errors, as users have a clearer understanding of what is expected from them.In education, the idea of a placeholder can also be metaphorically applied to concepts and ideas that are yet to be fully developed. For example, when students brainstorm ideas for an essay, they might jot down placeholder thoughts that serve as starting points. These initial ideas can later be expanded upon and refined into more comprehensive arguments or narratives. This process of using placeholder thoughts is essential in creative writing and critical thinking, as it encourages exploration and innovation.In conclusion, the term placeholder plays a vital role in various fields including design, programming, and education. It represents the importance of having temporary solutions that pave the way for final outcomes. Whether it is a visual element on a webpage, a variable in a piece of code, or an initial thought in a brainstorming session, placeholder serves as a reminder that every great achievement begins with a simple idea or structure. By understanding and utilizing placeholder effectively, we can enhance our productivity and creativity, ultimately leading to successful outcomes in our projects and endeavors.

在技术和设计的世界中，术语placeholder指的是在文档或用户界面中临时使用的符号或文本。它作为内容最终将放置的位置的视觉提示。例如，在设计网站时，设计师可能会使用一个placeholder图像来指示一张照片将在可用时放置的位置。这使得设计过程能够继续，而不必因为缺少实际图像或文本而停滞不前。placeholder元素的重要性不容小觑，因为它们为布局提供了清晰的结构和流程，使设计师能够在早期阶段就可视化最终产品。placeholder的概念不仅限于视觉艺术；它在编程和编码中也至关重要。在许多编程语言中，placeholder可以是一个临时赋值的变量，在最终数据可用之前。这允许开发人员在不需要所有最终输入的情况下编写和测试代码。例如，程序员可以创建一个函数，使用一个placeholder变量来表示用户输入。一旦接收到实际输入，placeholder将被真实数据替换，从而使代码具有功能性和动态性。此外，使用placeholder元素可以增强应用程序中的用户体验。当用户在表单字段中看到placeholder文本时，它引导他们了解所需的信息。例如，搜索栏可能包含placeholder文本“搜索...”，这表明用户可以在此输入查询。这不仅提高了可用性，还帮助减少错误，因为用户对他们的期望有更清晰的理解。在教育中，placeholder的想法也可以隐喻地应用于尚未完全发展的概念和思想。例如，当学生为一篇文章集思广益时，他们可能会记下placeholder想法，作为起点。这些初步想法可以在后续扩展和完善，形成更全面的论点或叙述。使用placeholder思想的这一过程在创意写作和批判性思维中至关重要，因为它鼓励探索和创新。总之，术语placeholder在设计、编程和教育等各个领域发挥着重要作用。它代表了拥有临时解决方案的重要性，这些解决方案为最终结果铺平道路。无论是网页上的视觉元素、代码中的变量，还是头脑风暴会议中的初始想法，placeholder都提醒我们，每一个伟大的成就都始于一个简单的想法或结构。通过有效理解和利用placeholder，我们可以提高生产力和创造力，最终在我们的项目和努力中取得成功的成果。