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浅谈TCP优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...BDP / (1 – 1 / 2^tcp_adv_win_scale)
此外，提醒一下延迟的测试方法，BDP中的延迟指的就是RTT，通常使用ping命令很容易就能得到它，但是如果 ICMP 被屏蔽，ping也就没用了，此时可以试试 synack。
如何调整「cwnd」到一个合理值
一...
苹果全球开发者大会：无硬件 iOS 9等三大系统更新 - 资讯 - 清泛网 - 专注C...
...像隐藏起来，仅收听声音。
iOS 9今天开始向开发者提供测试版本下载，公开测试版7月推出，预计9月底正式版将与iPhone 6s同时推出。iPhone 4s与iPad 2以及以上的设备都可以升级至iOS 9，苹果表示iPad Air 2完整支持3项分屏功能，而iPad ...
Linux C/C++程序常用的调试手段及异常排查总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...可以根据log进行分析，找出问题的根本原因；最怕的就是测试或者客户测反馈一个bug，但是没有效 log和相关配置，然后本地又复现不出来，这种比较麻烦，能做的无非就是复现，或者做一些促进复现的工作，比如写一些测试脚...
Error 908: Permission RECEIVE_SMS has been denied. - App Inventor 2 中...
...伴侣允许对使用谷歌认为可疑的功能的应用程序进行实时测试。在Google Play发布的版本中，此功能将根本无法工作或引发权限错误。
该伴侣仅用于实时测试，您使用的版本与构建应用程序时将发生的事情无关。当您构建应用程...
Any tools to generate an XSD schema from an XML instance document? [closed]
I am looking for a tool which will take an XML instance document and output a corresponding XSD schema.
10 Answers
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File Upload without Form
Without using any forms whatsoever, can I just send a file/files from <input type="file"> to 'upload.php' using POST method using jQuery. The input tag is not inside any form tag. It stands individually. So I don't want to use jQuery plugins like 'ajaxForm' or 'ajaxSubmit'.
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MVC演化史 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Model往往需要多种View表现形式，如文本、图像。
提高可测试性：相对Model而言，View是不容易测试的。
从View中分离Controller就不那么重要了。Desktop软件的时代，View和Controller往往是一一对应的关系，所以常常把他们合并成为UI...
Changing route doesn't scroll to top in the new page
I've found some undesired, at least for me, behaviour when the route changes.
In the step 11 of the tutorial http://angular.github.io/angular-phonecat/step-11/app/#/phones
you can see the list of phones. If you scroll to the bottom and click on one of the latest, you can see that the scroll isn't ...
Element-wise addition of 2 lists?
...hension:
>>> [sum(x) for x in zip(list1, list2)]
[5, 7, 9]
Timing comparisons:
>>> list2 = [4, 5, 6]*10**5
>>> list1 = [1, 2, 3]*10**5
>>> %timeit from operator import add;map(add, list1, list2)
10 loops, best of 3: 44.6 ms per loop
>>> %timeit from i...
Can you connect to Amazon ElastiСache Redis outside of Amazon?
...
No, you can't without resorting to 'tricks' such as a tunnel, which maybe OK for testing but will kill any real benefit of using a super-fast cache with the added latency/overhead.
...an Amazon ElastiCache Cluster, inside or outside a VPC, is never
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