大约有 600 项符合查询结果(耗时:0.0099秒) [XML]

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NodeJS: Saving a base64-encoded image to disk

My Express app is receiving a base64-encoded PNG from the browser (generated from canvas with toDataURL() ) and writing it to a file. But the file isn't a valid image file, and the "file" utility simply identifies it as "data". ...
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C++ “virtual” keyword for functions in derived classes. Is it necessary?

... James McNellisJames McNellis 319k7070 gold badges865865 silver badges944944 bronze badges ...
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Convert file path to a file URI?

..., but if you give it the path C:\a b.txt then you end up with file:///C:/a%2520b.txt instead of file:///C:/a%20b.txt - somehow it decides that some sequences should be decoded but not others. Now we could just prefix with "file:///" ourselves, however this fails to take UNC paths like \\remote\share...
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How can I replace a newline (\n) using sed?

... Use this solution with GNU sed: sed ':a;N;$!ba;s/\n/ /g' file This will read the whole file in a loop, then replaces the newline(s) with a space. Explanation: Create a label via :a. Append the current and next line to the pattern space via N. If we are before the ...
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App Inventor 2 拓展参考文档 · App Inventor 2 中文网

... 入门必读 中文教程 IoT专题 AI2拓展 Aia Store 开通VIP 搜索 App Inventor 2 拓展参考文档 ...
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App Inventor 2 如何连接MySQL数据库(阿里云数据库) · App Inventor 2 中文网

...,参考如下: 服务器响应处理代码块,参考如下: .aia源码下载: mysql.aia 后端php代码 php参考代码如下:
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App Inventor 2 AsciiConversion 拓展,ASCII编码与解码,Ascii码转换 · App Inventor 2 中文网

...: AsciiConversion.aix demo程序下载: test_AsciiConversion.aia 此扩展允许用户将 Ascii 代码(列表)转换为相应的文本,也可以将指定的字符转换为相应的 Ascii 代码。 此扩展提供 3个 函数: AsciiCode: 给出字符,返回它相应的 Ascii码...
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蓝牙BLE硬件接入及IO控制 · App Inventor 2 源码商店

Aia Store beta App Inventor 2 中文网 开始编程 中文文档 中文教程 中文社区 关于 关于我们...
https://www.fun123.cn/aia-store/240126104220566 

打地鼠游戏 · App Inventor 2 源码商店

Aia Store beta App Inventor 2 中文网 开始编程 中文文档 中文教程 中文社区 关于 关于我们...
https://www.fun123.cn/aia-store/240126110920432 

接水果游戏 · App Inventor 2 源码商店

Aia Store beta App Inventor 2 中文网 开始编程 中文文档 中文教程 中文社区 关于 关于我们...