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BLE（四）嗅探工具 - 创客硬件开发 - 清泛IT社区，为创新赋能！
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商业级的Ellisys BEX400侦听工具最为符合对BLE流量捕获及分析的要求，然而售价过于昂贵；
其次，作为开源硬件且配有混杂模式追踪的“超牙”设备——Ubertooth One拥有二次开发和嗅探已建立连接的蓝牙通信数据包的能力；
而...
微软VS苹果 桌面操作系统的终极一战 - 创意 - 清泛网 - 专注C/C++及内核技术
...月后是否依然免费，如果不免费那么销售版本的价格又是多少，对于这些问题，微软一直也没跟大家交个底。很显然，作为公司利润超过20%，为公司带来的收益仅此于Office的Windows，微软压根就没打算停止从其获取更高的利益。...
融资千万美元后的足记要如何应对“爆款后遗症”？ - 资讯 - 清泛网 - 专注C...
...遗症”。在脸萌持续静默的时候，足记之前也在外界没有多少响动。但杨柳认为这几个月还是做了不少重要的事：后台从php架构换成Java架构。这些工作前端看不到，但如果不改后台，新功能一个都上不了。
8月底9月初，足记的...
Get list of passed arguments in Windows batch script (.bat)
...1 to a drive letter only
%~p1 - expands %1 to a path only
%~n1 - expands %1 to a file name only
%~x1 - expands %1 to a file extension only
%~s1 - expanded path contains short names only
%~a1 - expands %1 to file attributes
%~t1 - expa...
Why is LINQ JOIN so much faster than linking with WHERE?
... This means the Where condition is evaluated for each combination of rows (n1 * n2 * n3 * n4)
The Join operator takes the rows from the first tables, then takes only the rows with a matching key from the second table, then only the rows with a matching key from the third table, and so on. This is mu...
Git log to get commits only for a specific branch
...a master branch
Do a few commits
You created a branch named b2
Do git log -n1; the commit Id is the merge base between b2 and master
Do a few commits in b2
git log will show your log history of b2 and master
Use commit range, if you aren't familiar with the concept, I invite you to google it or stac...
通过FastCGI Cache实现服务降级 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...何实现呢？最简单的方法就是通过单位时间内出错次数的多少来判断系统健康以否，设置相应的阈值，一旦超过限制就全局激活缓存，通过Lua我们可以实现一个定制版：
lua_shared_dict status 1m;
limit_conn_zone $server_name zone=perserver:...
How to open, read, and write from serial port in C?
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}
set_interface_attribs (fd, B115200, 0); // set speed to 115,200 bps, 8n1 (no parity)
set_blocking (fd, 0); // set no blocking
write (fd, "hello!\n", 7); // send 7 character greeting
usleep ((7 + 25) * 100); // sleep enough to transmit the 7 plus
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Calling a class function inside of __init__
...the MyClass object. Where would self be necessary?
– n1k31t4
Jul 1 '18 at 13:25
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Can “git pull --all” update all my local branches?
... then
REMOTES=$(git remote);
fi
REMOTES=$(echo "$REMOTES" | xargs -n1 echo)
CLB=$(git rev-parse --abbrev-ref HEAD);
echo "$REMOTES" | while read REMOTE; do
git remote update $REMOTE
git remote show $REMOTE -n \
| awk '/merges with remote/{print $5" "$1}' \
| while read RB...