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2026 第 48 届世界技能大会 移动应用开发 手搓代码竞赛 - 闲聊区 - 清泛IT...
App 手搓代码比赛，还有网页设计，后端开发，AI 时代还用得上？即将用我们的 AI 助手搓出来比一比看看
二分算法（Binary Search） · App Inventor 2 中文网
...能解决快速查找、快速定位的问题。主要用到数学和逻辑代码块。
★★☆ 难度
动手完成
项目教程跟着步骤完成作品
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弹球游戏 · App Inventor 2 中文网
... 绘图动画组件使用，游戏App开发最佳入门。只需要27个代码块就能开发出一款可玩的弹球游戏App，快来试试吧~
★☆ 难度
动手完成
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微调器 · 组件速查 · App Inventor 2 中文网
...素表”里填几个词（这里用的是 猫、狗、鸟）。
切到代码块界面，点“微调器1”。
拖出 当 微调器1.选择完成 代码块。
接着点“标签1”。
接上 设 标签1.文本 为 代码块。
把鼠标停在红色的“选中项”上。
接上 ...
Quick unix command to display specific lines in the middle of a file?
Trying to debug an issue with a server and my only log file is a 20GB log file (with no timestamps even! Why do people use System.out.println() as logging? In production?!)
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What is AF_INET, and why do I need it?
... The Linux kernel, for example, supports 29 other address families such as UNIX (AF_UNIX) sockets and IPX (AF_IPX), and also communications with IRDA and Bluetooth (AF_IRDA and AF_BLUETOOTH, but it is doubtful you'll use these at such a low level).
For the most part, sticking with AF_INET for socke...
Remove blank lines with grep
...e line endings), whereas the above only removes files with blank lines and unix style line endings:
grep -v -e '^[[:space:]]*$' foo.txt
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Change EOL on multiple files in one go
...h Mode" to "Extended", and you can work with EOL (\r\n in Windows or \n in Unix), tabs (\t), etc.
You can also use the Find in Files tab of the dialog to do the replace across multiple files.
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How to detect my browser version and operating system using JavaScript?
...all versions of Macintosh OS
// "Linux" for all versions of Linux
// "UNIX" for all other UNIX flavors
// "Unknown OS" indicates failure to detect the OS
var OSName="Unknown OS";
if (navigator.appVersion.indexOf("Win")!=-1) OSName="Windows";
if (navigator.appVersion.indexOf("Mac")!=-1) ...
C# 能否获取一个对象所占内存的大小？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的是sizeof()。
下面开始验证，首先来验证值类型，验证代码如下：
int size = sizeof (int); //4个字节
注意点：sizeof 运算符仅适用于值类型，而不适用于引用类型。sizeof 运算符只能在不安全代码块中使用。如下面的代码将无法...