大约有 40,000 项符合查询结果（耗时：0.0413秒） [XML]
- App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
1、UUID 背后的理念是，由于空间非常大（2^128，比宇宙中原子的估计数量还要多），随机选择两个 UUID 来标识事物时几乎不可能产生碰撞。如果您知道要连接的服务/特性，那么将它们编码到应用程序中是有意义的。如果您正在开...
判断输入框的内容在TXT文档中是否有一样的，代码如何写 - App Inventor 2 ...
判断输入框的内容在TXT文档中是否一样，代码如何写这里只提供思路：
1、使用“文件管理器”组件.读取文件 方法，将TXT中内容读取并存入一个全局文本变量中。
2、使用 文本代码块的是否包含 方法，判断输入框中的内容是...
AppInventor2使用 MaterialIcons 图标字体，快捷展示专业图标 - App应用开...
平时布局的话，如果要使用图标，一般需要去找 png 图片，且透明背景的。如果需要根据不同常见图标进行变色的话，就需要准备多张不同样式的图标，还要考虑图片的分辨率等等因素，非常的麻烦。
这时，如果我们使用图标...
Pro Camera 扩展：专业级自定义相机，提供滤镜、降噪、对焦等高级功能 · A...
...a 扩展
Pro Camera 是基于最新 Android Camera API 设计的专业相机扩展，提供更丰富的相机功能和控制选项。
ℹ 扩展需要 Android 5.0 Lollipop 及以上版本才能正常工作。
下载链接
com.kumaraswamy.camerax.aix
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Case objects vs Enumerations in Scala
...xtends Enumeration {
val GBP = Value("GBP")
val EUR = Value("EUR") //etc.
}
Then you can do:
val ccy = Currency.withName("EUR")
This is useful when wishing to persist enumerations (for example, to a database) or create them from data residing in files. However, I find in general that enumer...
What does “The APR based Apache Tomcat Native library was not found” mean?
...ided in the Java Runtime (such as sendfile, epoll, OpenSSL, system status, etc.). Tomcat will run just fine without it, but for some use cases, it will be faster with the native libraries.
If you really want it, download the tcnative-1.dll (or libtcnative.so for Linux) and put it in the bin folder,...
What is the best project structure for a Python application? [closed]
...e a number of top-level files (like setup.py, README.md, requirements.txt, etc). There are then three directories that every project should have:
A docs directory containing project documentation
A directory named with the project's name which stores the actual Python package
A test directory in on...
RESTful URL design for search
...persistance) where the result may contains search scoring, categorisation, etc. You can also create/delete a named search like /cars/search/mysearch. Look at that: stackoverflow.com/a/18933902/1480391
– Yves M.
Jan 30 '14 at 14:32
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__proto__ VS. prototype in JavaScript
... is the actual object that is used in the lookup chain to resolve methods, etc. prototype is the object that is used to build __proto__ when you create an object with new:
( new Foo ).__proto__ === Foo.prototype;
( new Foo ).prototype === undefined;
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How do I print a list of “Build Settings” in Xcode project?
...cal list of Xcode Environment Variables that can be used in Build Rules etc?
7 Answers
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