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required file `./ltmain.sh' not found - 脚本技术 - 清泛IT论坛，有思想、有深度
...最后由 zqp2013 于 2015-1-27 15:23 编辑
在linux下编译c/c＋＋程序出错：
$ automake --add-missing
....
configure.in:18: required file `build/ltmain.sh' not found
....
解决方案(libtoolize配置即可)：
$libtoolize --version
-libtoolize (GNU libtool) 1.4.2
.....（确...
BLE 蓝牙模块添加延时控制开关 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
BLE 蓝牙模块如何添加延时控制开关，例如，在APP上点击一下，控制延时 10分钟、20分钟、1小时等多个选着时间控制程序开关灯，请指点，谢谢使用计时器组件，设置计时间隔，事件中给硬件发指令
UrsAI2ByteArray 字节数组扩展：读写二进制数据 - App Inventor 2 拓展 - ...
在技术应用或控制设备时，经常需要使用二进制数据。此扩展允许维护二进制数据字段（字节数组）。
官方页面：https://ullisroboterseite.de/android-AI2-ByteArray-en.html
APP INVENTOR硬件交互学习教程06——硬件参数上报 - 创客硬件开发 - 清泛IT...
...组件
增加两个标签，一个布局，一个文本输入框
2.程序逻辑
增加接收处理和显示判断
3.arduino nano代码
// 引脚定义
const int ledPin1 = 5;// the number of the LED pin
const int ledPin2 = 6;
const int ledPin3 = 3;
const...
APP INVENTOR硬件交互学习教程08——增加语音播报 - 创客硬件开发 - 清泛IT...
这一节介绍增加语音播报功能，需要增加一个复选框和一个文本朗读器组件。
1.界面设计
2.程序设计
断电模式可以保存，复选框配置模式
ADT requires 'org.eclipse.wst.sse.core 0.0.0' but it could not be found
... not yet include all of
them, but they can be easily installed
by following these instructions.
Eclipse 3.6 (Helios)
Select Help > Install New Software...
Click the link for Available Software Sites.
Ensure there is an update site named Helios. If this is not present,
click Ad...
A non-blocking read on a subprocess.PIPE in Python
... I invoke .readline ? I'd like this to be portable or at least work under Windows and Linux.
29 Answers
...
What is Cache-Control: private?
...te proxy, then all 67198 users hitting the same page in the same 15-second window will all get the same contents - all served from close cache. Performance win for everyone.
The virtue of adding Cache-Control: max-age is that the browser doesn't even have to perform a conditional request.
if you ...
How do you convert a byte array to a hexadecimal string, and vice versa?
... faster than {IEnumerable}.Aggregate, for instance, but BitConverter still wins.
Update (2012-04-03)
Added Mykroft's SoapHexBinary answer to analysis, which took over third place.
Update (2013-01-15)
Added CodesInChaos's byte manipulation answer, which took over first place (by a large margin on...
How does the const constructor actually work?
...
const is a nice performance win for Flutter widgets according to medium.com/@mehmetf_71205/inheriting-widgets-b7ac56dbbeb1 "Use const to build your widgets Without const, selective rebuilding of the sub-tree does not happen. Flutter creates a new insta...