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App Inventor 2 蓝牙BLE扩展源码分析 - WriteBytes vs WriteStrings 23字节...
...写入路径
位于 BLEWriteOperation.write() 方法第678-690行：
if (mClass == String.class) {
byte[] str = ((String) data.get(0)).getBytes();
// ↓ 23字节硬限制！
final int len = Math.min(23, str.length + (null...
SVG图像加载扩展 - 第三方扩展集合 · App Inventor 2 中文网
...位为像素。
不透明度
设置SVG图像的不透明度，范围为0.0-1.0。
旋转角度
设置SVG图像的旋转角度，单位为度。
水平缩放
设置SVG图像的水平缩放比例。
垂直缩放
设置SVG图像的垂直缩放比例。
方法
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How to resize a tableHeaderView of a UITableView?
...
180
FYI: I've gotten this to work by modifying the tableHeaderView and re-setting it. In this case, ...
How to deal with INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES without uninstall?
...tor). For example, if this is a device, you might have put the old copy on from a different development machine (e.g., some other developer's machine). Or, the old one is signed with your production key and the new one is signed with your debug key.
...
How to make a website secured with https
...ning to host it in public domain, so that the employees can connect to app from various locations. (Till now I have built web apps that are hosted internally only)
...
What's the difference between an inverted index and a plain old index?
...indexes - it's just a question of which direction you're going. Forward is from documents->to->words, inverted is from words->to->documents.
Example 2: DNS
Another example is a DNS lookup (which takes a host name, and returns an IP address) and a reverse lookup (which takes an IP add...
Open Sublime Text from Terminal in macOS
...s to work on my OSX box. I used these steps to get it to work:
Test subl from your ST installation:
First, navigate to a small folder in Terminal that you want ST to open and enter the following command:
/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl .
NOTE: You may need to re...
Set attributes from dictionary in python
Is it possible to create an object from a dictionary in python in such a way that each key is an attribute of that object?
...
position: fixed doesn't work on iPad and iPhone
...g post that explains the problem: http://www.quirksmode.org/blog/archives/2010/12/the_fifth_posit.html
Also see this page for a compatibility chart showing which mobile browsers support position:fixed;: http://www.quirksmode.org/m/css.html
(but note that the mobile browser world is moving very qui...
Lua简明教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...你把他的源码下下来编译后，你会发现解释器居然不到200k，这是多么地变态啊（/bin/sh都要1M，MacOS平台），而且能和C语言非常好的互动。我很好奇得浏览了一下Lua解释器的源码，这可能是我看过最干净的C的源码了。
我不想写...