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使用App Inventor 2 控制物联网设备/低功耗蓝牙设备(BLE) · App Inventor 2 中文网
...序只需要通过将所选组件插入在一起来组合它们，并操作激活组件所需功能的关联块。 这是使用 MIT App Inventor 界面的两个部分完成的，如图 1 所示：
设计器 - 设计器允许用户选择他们将在移动应用程序中使用的组件并调...
How to quickly check if folder is empty (.NET)?
...re is the extra fast solution, that I finally implemented. Here I am using WinAPI and functions FindFirstFile, FindNextFile. It allows to avoid enumeration of all items in Folder and stops right after detecting the first object in the Folder. This approach is ~6(!!) times faster, than described abov...
Does a favicon have to be 32x32 or 16x16?
...rimarily uses a manifest and also relies on the Apple touch icon.
IE 10 on Windows 8.0 requires PNG pictures and a background color and IE 11 on Windows 8.1 and 10 accepts several PNG pictures declared in a dedicated XML file called browserconfig.xml.
Safari for Mac OS X El Capitan introduces an SVG...
Creating Scheduled Tasks
...roject. I need to allow the user to create and add a scheduled task to the Windows Task Scheduler.
2 Answers
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Checking if a folder exists using a .bat file [closed]
...his https://jeffpar.github.io/kbarchive/kb/065/Q65994/
C:
IF NOT EXIST C:\WIN\ GOTO NOWINDIR
CD \WIN
:NOWINDIR
trailing backslash ('\') seems to be enough to distinguish between directories and ordinary files.
share
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Where does Visual Studio look for C++ header files?
...
Actually On my windows 10 with visual studio 2017 community, the C++ headers path are:
C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Tools\MSVC\14.15.26726\include
C:\Program Files (x86)\Windows Kits\10\Include\10.0.171...
Python: What OS am I running on?
What do I need to look at to see whether I'm on Windows or Unix, etc?
25 Answers
25
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UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
...n piping stdout in Python, but I could not get these example to work.
Following example code makes the output aware of your target charset.
# -*- coding: utf-8 -*-
import sys
print sys.stdout.encoding
print u"Stöcker".encode(sys.stdout.encoding, errors='replace')
print u"Стоескер".encode(...
Open new Terminal Tab from command line (Mac OS X)
...lication "Terminal" to do script "echo hello" in selected tab of the front window' to the end of the osascript command.
– Gordon Davisson
Aug 26 '12 at 20:14
2
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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区，为创新赋能！
...。但是有些消息比如阀门泄露告警或控制石油管道阀门的命令，就必须要在网络有问题的情况下也要能确保发送成功。
myriota这家提供物联网数据LEO卫星传输服务的公司，流量报价是1M字节的数据500美元/月。因此，每次传输...