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App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件 - Ap...
App Inventor 2 扩展开发实战：从Java小白到发布第一个.aix自定义插件
刚接触App Inventor 2时，大部分人会被它现成的组件库"惯坏"——想听歌有Player、想拍照有Camera、想存数据有TinyDB。但做着做着就发现，有些需求官方组件...
NSIS学习笔记（持续更新） - C/C++ - 清泛网 - 专注C/C++及内核技术
...Update4参考资料[3]来做S1:新建一个空的C++DLL项目，nsMessageBoxPlugin.S2:复制C: Program File...Q 如何使用C++开发插件,示例
环境：VS2013Update4
参考资料[3]来做
S1:新建一个空的C++DLL项目，nsMessageBoxPlugin.
S2:复制“C:\Program Files (x86)\NSIS\Unicode...
Count occurrences of a char in a string using Bash
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I would use the following awk command:
string="text,text,text,text"
char=","
awk -F"${char}" '{print NF-1}' <<< "${string}"
I'm splitting the string by $char and print the number of resulting fields minus 1.
If your shell does not support the <<< operat...
How to center a (background) image within a div?
... If you want the entire div to be filled with the image and no extra space you should use background-size: cover; If you want the entire image to show without any part of the image being cut off or stretched you want to use background-size: contain;
– Zlerp
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lodash multi-column sortBy descending
...ifferent direction ordering
Lodash >4
var sortedArray = _.orderBy(mixedArray,
['foo','foo.bar','bar.foo.bar'],
['desc','asc','desc']);
share
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App Inventor 2 串口调试 App 全方案技术调研 - App应用开发 - 清泛IT社区，为创新赋能！
...连接
- ReadSerial() — 读取数据（文本模式）
- WriteSerial(text) — 发送文本
- PrintSerial(text) — 发送文本+换行
- BaudRate 属性（默认9600）
- BufferSize 属性（默认256）
- IsOpen / IsInitialized 状态属性
局限性：
- 不支持端口选择（自动...
How can I recall the argument of the previous bash command?
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ahh... *nix... you are a thing of beauty... everyday I love you more
– jx12345
May 26 '17 at 12:36
5
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Get: TypeError: 'dict_values' object does not support indexing when using python 3.2.3 [duplicate]
...s code is unpythonic for everyone looking at this - in Python we avoid indexes (slower, uglier). The correct way is as per @DavidRobinson's answer: dict(zip(names, d.values())). Of course this code also relies on values being sorted as names which is by no means guaranteed.
– M...
Why does base64 encoding require padding if the input length is not divisible by 3?
What is the purpose of padding in base64 encoding. The following is the extract from wikipedia:
3 Answers
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Scroll back to the top of scrollable div
How to reset the scroll position back to top of container div the next time?
15 Answers
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