...上万个客户端；每次消息传输的数据量不大；协议客户端软件要能在CPU和存储等计算资源都很有限的单片机、单板机、RTU等上运行；并能方便的实现移植到不同的硬件上；带宽低，通信流量费用高昂；需要最大限度地减少传输消...

...。 起初 Rivest 和 Shamir 构造出来的算法很快就能被 Adleman 破解，二人受到强烈的打击，以至于有一阶段他们走向了另一个极端，试图证明 Diffie 他们的想法根本就是不靠谱的。但慢慢的，破解变得没那么容易，特别是他们的第 32 ...

... Given it's a raw expression, you should use DB::raw() to set CURRENT_TIMESTAMP as a default value for a column: $table->timestamp('created_at')->default(DB::raw('CURRENT_TIMESTAMP')); This works flawlessly on every database driver. Ne...

... Copying my own answer from How do I run a Node.js application as its own process? 2015 answer: nearly every Linux distro comes with systemd, which means forever, monit, PM2, etc are no longer necessary - your OS already handles these tasks. Make a myapp.service file (replacing 'myapp' with your...

...禁止爬虫访问，怎么让他们不能监控到我们的访问时爬虫软件，这就是反监控机制了； 抓取管理指通过url，结合资源、反监控抓取数据并存储；我们现在大部分爬虫系统，很多都需要自己设定正则表达式，或者使用htmlparser...

App Inventor 2 【源码】简易版捕鱼游戏 .aia 源码简易版捕鱼游戏，代码块300+，来源互联网，请自行研究。下载地址。 简易版捕鱼游戏，代码块300+，来源互联网，请自行研究。 下载地址。 AppInventor,AppInventor2

... stream 1 (STDOUT) will be redirected. So you can redirect any stream with prepending the number like 2> err.txt and it is also allowed to redirect multiple streams in one line. dir 1> files.txt 2> err.txt 3> nothing.txt In this example the "standard output" will go into files.txt, al...

...g: As noted in the comments below, this may not be reliable when used with proxy servers or when handling certain types of redirects. @Geoffrey's answer may handle these more reliably. share | impro...

... SHIFT-Q worked for me in powershell 3.0 on win7. Q would exit powershell – amundell Oct 1 '15 at 13:51 ...

...个项目写了一个VC6下的MFC程序，结果传到别人的机子上（WIN7）出现了应用程序正常初始化（0xc0150002）失败的问题，当时还以为就是WIN7的问题，后来把程序复制到一台WINXP SP3的程序下还是不行。 为什么我的机子上能够，而别人...