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图片工具箱:获取图片大小、裁剪、压缩、旋转、加水印(附 .aia 源码) · ...
...撤销一步
按比例裁剪
上传前压缩
常见问题
用到的组件
验证范围
图片工具箱:选一张照片,看它多大、多少像素,然后裁剪、旋转、压缩、加水印,每一步都能撤销,满意了直接分享或保存。
下载 Imag...
MLKitPoseDetector 拓展:离线人体姿势检测(33 个关键点) · App Inventor 2 中文网
... 运行环境:AI 伴侣联机需要 Android 11 及以上
常见问题
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MLKitPoseDetector 拓展
检测图片里人体的姿势,输出 33 个关键点(鼻、眼、耳、嘴、肩、肘、腕、手指、髋、膝、踝、脚)
的坐...
TaifunWiFi 拓展:手机WiFi连接管理 · App Inventor 2 中文网
...
兼容性说明
故障排除
常见问题
开发信息
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TaifunWiFi 拓展:手机WiFi连接管理
在无线局域网中使用的功能块。
.aix 拓展下载:...
场景样式(HarmonyStyleKit)使用指导 · App Inventor 2 中文网
...:应用主题到当前表单
参数与返回值速查
常见问题与验收
完整 .aia 源码与操作指导
设备主题构建与应用
主题样式组件 - 鸿蒙场景主题构建与应用。
鸿蒙独有组件,根据场景档位...
What RSA key length should I use for my SSL certificates?
...cated because they could be cracked given a small datacenter (thousands of CPU or hundreds of GPU, in maybe a few months). It may seem a lot but it was well within reach of any large organization or government.
2048 bits
2048 bits RSA certificates are currently the accepted norm in use.
Default ...
文本框输入十六进制,按字节通过蓝牙发送 · App Inventor 2 中文网
...不对时给出提示
实验四:设备要求加帧头和校验
常见问题
平台说明
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有用户问:我想把文本框里输入的「ABCD」,以十六进制 0xAB 0xCD 这样的两个字节通过蓝牙发送出去,有什么转换方案吗?
目前蓝...
How does a “stack overflow” occur and how do you prevent it?
...nsumes as much as 64 bytes on the stack (32 bit processor, saving half the CPU registers, flags, etc)
Keep your call tree shallow (similar to the above statement)
Web servers
It depends on the 'sandbox' you have whether you can control or even see the stack. Chances are good you can treat web se...
Do any JVM's JIT compilers generate code that uses vectorized floating point instructions?
...java -jar javacpp.jar Dot.java -exec
With an Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz, Fedora 30, GCC 9.1.1, and OpenJDK 8 or 11, I get this kind of output:
dot(): 39 ns
dotc(): 16 ns
Or roughly 2.4 times faster. We need to use direct NIO buffers instead of arrays, but HotSpot can access direc...
面包板与基础电路 - IoT 硬件实验的前置知识 · App Inventor 2 中文网
...只用板子不接手机,先把电路跑通
怀疑是电路问题还是 App 问题时,先甩开手机,用 Arduino 官方的三个最小例子验证硬件:
想验证
官方例子
LED 亮不亮(数字输出)
Blink
...
How would Git handle a SHA-1 collision on a blob?
...ations. This took the equivalent processing power as 6,500 years of single-CPU computations and 110 years of single-GPU computations.
b/ would forge one file (with the same SHA1), but with the additional constraint its content and size would produce the identical SHA1 (a collision on the content al...
