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App Inventor 2 鸿蒙先行版：AppInventor 从此支持全平台，不再安卓专属 - ...
...小。就几个人，还要维护现有的安卓和iOS版本、处理用户问题、更新内容。鸿蒙开发只能挤时间做。大量借助AI辅助编程，3个月8w+行代码。这个不藏着掖着。鸿蒙版的很多代码是AI辅助完成的，这加速了开发，但也意味着代码质...
App Inventor 2 项目会自动保存吗？这两个操作很多人不知道 - App应用开发 ...
...吗？这两个操作很多人不知道
有朋友在社区问了一个问题：App Inventor 2 的项目是自动保存的吗？
说实话，这个问题刚听到的时候我还愣了一下——因为对老手来说，这几乎是"呼吸一样自然"的事。但仔细想想，对于...
What is Node.js? [closed]
I don't fully get what Node.js is all about. Maybe it's because I am mainly a web based business application developer. What is it and what is the use of it?
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Using ThreadPool.QueueUserWorkItem in ASP.NET in a high traffic scenario
...m to be leaving out the most important point:
Unless you are trying to parallelize a CPU-intensive operation in order to get it done faster on a low-load site, there is no point in using a worker thread at all.
That goes for both free threads, created by new Thread(...), and worker threads in the ...
How to remove line breaks (no characters!) from the string?
...
You should be able to replace it with a preg that removes all newlines and carriage returns. The code is:
preg_replace( "/\r|\n/", "", $yourString );
Even though the \n characters are not appearing, if you are getting carriage returns there is an invisible character there. The pr...
How to grey out a button?
... disabled by setting the alpha (making it semi-transparent). This is especially useful if your button background is an image, and you don't want to create states for it.
button.setAlpha(.5f);
button.setClickable(false);
update: I wrote the above solution pre Kotlin and when I was a rookie. It's m...
Find the nth occurrence of substring in a string
...ad been thinking of doing the equivalent of .rfind('XXX'), but that would fall apart if 'XXX' appears later in the input anyway.
– Nikhil Chelliah
Jul 7 '10 at 4:17
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Difference between float and decimal data type
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Actually, the DECIMAL addition is in error. If you add 33.333333333 three times you don't get 100. If you divide 100 by 3 you don't get a rational number without a repeating set of trailing digits, so you can't multiply it by 3 a...
移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...是，devicePixelRatio在不同的浏览器中还存在些许的兼容性问题，所以我们现在还并不能完全信赖这个东西，具体的情况可以看下这篇文章。
devicePixelRatio的测试结果：
三、PPK的关于三个viewport的理论
ppk大神对于移动设备上...
在MongoDB中模拟Auto Increment - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...给_id就OK了，因为它的实现满足原子性，所以不存在并发问题。
另外说明一点，findAndModify本身提供了一个upsert参数，为true的话可以自动insert，但那样就不能自定义初始值了，所以文中示例没有使用upsert。
BTW，数据库“_seq”的...