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TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...要多少的时间，从而可以方便地设置Timeout——RTO（Retransmission TimeOut），以让我们的重传机制更高效。 听起来似乎很简单，好像就是在发送端发包时记下t0，然后接收端再把这个ack回来时再记一个t1，于是RTT = t1 – t0。没那么...
How to generate a git patch for a specific commit?
I need to write a script that creates patches for a list of SHA1 commit numbers.
10 Answers
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Why is Dictionary preferred over Hashtable in C#?
In most programming languages, dictionaries are preferred over hashtables.
What are the reasons behind that?
19 Answers
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Modifying location.hash without page scrolling
We've got a few pages using ajax to load in content and there's a few occasions where we need to deep link into a page. Instead of having a link to "Users" and telling people to click "settings" it's helpful to be able to link people to user.aspx#settings
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Find the closest ancestor element that has a specific class
How can I find an element's ancestor that is closest up the tree that has a particular class, in pure JavaScript ? For example, in a tree like so:
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What characters are allowed in an email address?
I'm not asking about full email validation.
17 Answers
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Cron job every three days
Is it possible to run a cronjob every three days? Or maybe 10 times/month.
11 Answers
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WKWebView in Interface Builder
It seems that the IB object templates in XCode 6 beta are still creating old-style objects (UIWebView for iOS and WebView for OSX). Hopefully Apple will update them for the modern WebKit, but until then, what is the best way to create WKWebViews in Interface Builder? Should I create a basic view (...
What happens when a duplicate key is put into a HashMap?
If I pass the same key multiple times to HashMap ’s put method, what happens to the original value? And what if even the value repeats? I didn’t find any documentation on this.
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How do I find the location of the executable in C? [duplicate]
Is there a way in C/C++ to find the location (full path) of the current executed program?
9 Answers
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