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由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

...,只要带宽、I/O够强,服务器计算能力够,并支持的并发连接数顶得住10万TCP链接的建立 的话,那没有问题。但在数据一致性面前,这10万就完完全全成了一个可望不可及的理论值了。 我说那么多,我只是想从业务上告诉大家...
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Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence

... d {1: '\xd7\x91\xd7\xa8\xd7\x99 \xd7\xa6\xd7\xa7\xd7\x9c\xd7\x94', 2: u'\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\u05d4'} >>> s=json.dumps(d, ensure_ascii=False, encoding='utf8') >>> s u'{"1": "\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\u05d4", "2": "\u05d1\u05e8\u05d9 \u05e6\u05e7\u05dc\...
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make arrayList.toArray() return more specific types

So, normally ArrayList.toArray() would return a type of Object[] ....but supposed it's an Arraylist of object Custom , how do I make toArray() to return a type of Custom[] rather than Object[] ? ...
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How can I plot with 2 different y-axes?

...# set up some fake test data time <- seq(0,72,12) betagal.abs <- c(0.05,0.18,0.25,0.31,0.32,0.34,0.35) cell.density <- c(0,1000,2000,3000,4000,5000,6000) ## add extra space to right margin of plot within frame par(mar=c(5, 4, 4, 6) + 0.1) ## Plot first set of data and draw its axis plot(t...
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Retrieve the commit log for a specific line in a file?

Is there any way to get git to give you a commit log for just commits that touched a particular line in a file? 10 Answer...
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Is volatile expensive?

After reading The JSR-133 Cookbook for Compiler Writers about the implementation of volatile, especially section "Interactions with Atomic Instructions" I assume that reading a volatile variable without updating it needs a LoadLoad or a LoadStore barrier. Further down the page I see that LoadLoad ...
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Current time formatting with Javascript

... i format date = "2016/03/01 11:00" to date ="Sat Mar 01 2016 11:00:00 GMT+0530 (IST)" – Vishal Singh Feb 25 '16 at 7:27 ...
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Eclipse ctrl+right does nothing

... Fabrizio 6,05144 gold badges2626 silver badges6464 bronze badges answered Aug 10 '16 at 15:52 Ryan McNamesRyan M...
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盘点微软历史上9大失败软件产品! - 创意 - 清泛网 - 专注C/C++及内核技术

...务软件的目的是为信息、用户、系统、各种设备提供无缝连接的一组软件产品或服务。但不久,全世界都发觉这个定义操作起来太不现实。微软自己也一度承认其对 .NET 的定义和使用给用户带来了困惑,后来“.NET”就不在 Windows...
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程序员,你有多久没有跳出技术关注业界了? - 创意 - 清泛网 - 专注C/C++及内核技术

...如须要移动端开发时,要注意移动端开发的特殊性,网络连接与资源消耗大,流量也需要加以注意。这个时候,我们可以从后端技术上主动去做一些调整,比如减少连接,比如压缩数据,让前端做到更优化,如果前端的童鞋不懂...