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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
...的服务和特征，而无需知道确切的 UUID 或有关服务和特征如何工作的详细信息。 所选择的服务和特征使得能够读取或写入特征数据值。 例如，通过电池电量服务和特性，可以监控所连接设备的电池电量。 由于 GATT 服务和特性的...
How can I make a time delay in Python? [duplicate]
...face, sleep() won't do the job - use after() instead: tkinter.Tk.after(yourrootwindow,60000) or yourrootwindow.after(60000)
– DonGru
Aug 3 '17 at 10:41
...
How to disable Golang unused import error
...t:
import (
"log"
"database/sql"
_ "github.com/go-sql-driver/mysql"
)
To import a package solely for its side-effects (initialization), use
the blank identifier as explicit package name.
View more at https://golang.org/ref/spec#Import_declarations
...
Django - how to create a file and save it to a model's FileField?
... my django app along with a celery worker. The django app volume for MEDIA_ROOT was not shared with the same volume in the celery worker. Sharing the named volume fixed it (ref).
– shadi
May 12 '18 at 7:33
...
Discuz轻松生成sitemaps.xml网站地图 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...pdateperi='60';//协议文件更新周期的上限，单位为分钟
$web_root=$_G['siteurl'];//根网址
$CHARSET='utf-8';// or gbk //选择编码方式
/***********************************************************************************************/
//网站地图sitemap.xml
$sitemap="<?xml v...
relative path in require_once doesn't work
...hp'); Per the documentation, the trailing slash is omitted except for the root directory.
– Ariel Allon
Dec 17 '12 at 17:26
...
How to find unused images in an Xcode project?
...re, and you just execute it from whatever directory you want to use as the root for searching for images (e.g. your project root folder). You can put it in ~/script/ for example and then go to your project root folder and run it by pointing to the script directly: ~/script/unused_images.sh
...
总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...int类型在内存中所占字节数）。为了知道static_cast<> 实际如何，我们不得不要来看一下CDerived的内存布局。
CDerived的内存布局（Memory Layout）
如图所示，CDerived的内存布局包括两个对象，CBaseX 和 CBaseY，编译器也知道这一点...
TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...情况太糟糕，反应也很强烈。
sshthresh = cwnd /2
cwnd 重置为 1
进入慢启动过程
2）Fast Retransmit算法，也就是在收到3个duplicate ACK时就开启重传，而不用等到RTO超时。
TCP Tahoe的实现和RTO超时一样。
TCP Reno的...
viewWillDisappear: Determine whether view controller is being popped or is showing a sub-view contro
...ther viewcontroller could be pushed on top of the stack and then call popToRootViewControllerAnimated bypassing viewWillDisappear on the ones in the middle.
– John K
Dec 23 '16 at 0:38
...