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关于php的socket初探 - PHP - 清泛IT论坛,有思想、有深度

... 关闭close”模式来操作。我的理解就是Socket就是该模式的一个实现,socket即是一种特殊的文件,一些socket函数就是对其进行的操作(读/写IO、打开、关闭) 既然Unix/Linux是将socket以一种io的形式来编程实现,那对于socket的研究必...
https://bbs.tsingfun.com/thread-1805-1-1.html 

MIT官方已升级至2.71版本,几乎就是仅增加一个全新主题 - App Inventor 2 ...

...Windows machines http://appinventor.mit.edu/ai2/ReleaseNotes.html 这是一个包含错误修复和改进的组件版本。它包括新的 Android MIT AI2 Companion 版本 2.71(来自 Google Play)和 2.71u(直接从 MIT App Inventor 下载)。 功能: 1、新用户界面。转到设...
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Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...ervers”个子进程后,为了满足MinSpareServers设置的需要创建一个进程,等待一秒钟,继续创建两个,再等待一秒钟,继续创建四个……如此按指数级增加创建的进程数,最多达到每秒32个,直到满足MinSpareServers设置的值为止。这就...
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How to convert An NSInteger to an int?

...ore than a 32/64 bit int. (it will use the appropriate size based on what OS/platform you're running) share | improve this answer | follow | ...
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How to read/write from/to file using Go?

...to read and write files in Go. Because file API has changed recently and most other answers don't work with Go 1. They also miss bufio which is important IMHO. In the following examples I copy a file by reading from it and writing to the destination file. Start with the basics package main impo...
https://bbs.tsingfun.com/thread-1777-1-1.html 

按键可见性的延时设置 - App Inventor 2 中文网 - 清泛IT社区,为创新赋能!

大家好,咨询请教一个问题, APP上面的 按键 当按下一个按键 设置2号按键可见性为假 (这个功能可以实现),但 在设定时间内,比如一个小时,或者更长时间后, 让原先的2号按键的可见性从原来的假 恢复成真 用“计时...
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mqtt协议一般最大支持订阅几个主题? - 创客硬件开发 - 清泛IT社区,为创新赋能!

...服务器端,一般几十到几百。以下来自AI的回答。 这是一个非常好的问题,但它没有一个简单的固定数字作为答案。MQTT协议规范本身并没有硬性规定一个客户端可以订阅主题的最大数量。这个限制主要取决于以下三个方面:MQ...
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What's the proper way to install pip, virtualenv, and distribute for Python?

...pted it to answer my more specific question about installing virtualenv across multiple versions of Python indpendently of system packages - stackoverflow.com/questions/6812207/… - works perfectly. – lofidevops Jul 29 '11 at 15:12 ...
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How to fix a locale setting warning from Perl?

... Your OS doesn't know about en_US.UTF-8. You didn't mention a specific platform, but I can reproduce your problem: % uname -a OSF1 hunter2 V5.1 2650 alpha % perl -e exit perl: warning: Setting locale failed. perl: warning: Please...
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Is it OK to leave a channel open?

Is it OK to leave a Go channel open forever (never close the channel) if I never check for its state? Will it lead to memory leaks? Is the following code OK? ...