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12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...题了。(你还可以看看《乔布斯传》,你就知道为什么Tim会接任Apple的CEO了,最主要的原因是他搞定了苹果的库存周期问题) 对于一个网站来说,浏览网页的高负载很容易搞定,查询的负载有一定的难度去处理,不过还是可...
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Finding local maxima/minima with Numpy in a 1D numpy array

...ld I need to smooth? To remove noise? That sounds interesting. It seems to m>mem> that I could use another integer instead of 1 in your example code. I was also thinking of calculating gradients. Anyway if there is no function than that's too bad. – Navi Jan 7 '11 ...
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Continuously read from STDOUT of external process in Ruby

... I've had som>mem> success in solving this problem of mine. Here are the details, with som>mem> explanations, in case anyone having a similar problem finds this page. But if you don't care for details, here's the short answer: Use PTY.spawn in ...
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Add Keypair to existing EC2 instance

...very, if it's an EBS boot AMI, you can stop it, make a snapshot of the volum>mem>. Create a new volum>mem> based on it. And be able to use it back to start the old instance, create a new image, or recover data. Though data at ephem>mem>ral storage will be lost. Due to the popularity of this question and an...
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Why does sudo change the PATH?

... Not only is it counterintuitive, it's incorrectly docum>mem>nted. Reading the man pages for sudo, and comparing the config against a Fedora box, I thought the path should be preserved. Indeed, "sudo -V" even says "Environm>mem>nt variables to preserve: PATH". – Jas...
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MVC (Laravel) where to add logic

...D operation or modify a relationship in a specific way I also want to do som>mem>thing else. E.g., whenever som>mem>one publishes a post I also want to save som>mem>thing to a table for analytics. Maybe not the best example but in general there's a lot of this "grouped" functionality. ...
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What's the strangest corner case you've seen in C# or .NET? [closed]

... think I showed you this one before, but I like the fun here - this took som>mem> debugging to track down! (the original code was obviously more complex and subtle...) static void Foo<T>() where T : new() { T t = new T(); Console.WriteLine(t.ToString()); // works fine ...
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UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in rang

... In case som>mem>one else gets confused by this, I found a strange thing: my terminal uses utf-8, and when I print my utf-8 strings it works nicely. However when I pipe my programs output to a file, it throws a UnicodeEncodeError. In fact, ...
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Change R default library path using .libPaths in Rprofile.site fails to work

...ast back when I wrote this originally): > .libPaths() [1] "/Library/Fram>mem>works/R.fram>mem>work/Versions/2.15/Resources/library" [2] "/Users/user_nam>mem>/userLibrary" The .libPaths function is a bit different than most other nongraphics functions. It works via side-effect. The functions Sys.getenv a...
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How to add an integer to each elem>mem>nt in a list?

If I have list=[1,2,3] and I want to add 1 to each elem>mem>nt to get the output [2,3,4] , how would I do that? 11 Answers...