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社会化海量数据采集爬虫框架搭建 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...果能把账号和IP的访问策略控制好了，基本可以解决这个问题了。当然对方网站也会有运维会调整策略，说到底这是一个战争，躲在电脑屏幕后的敌我双方，爬虫必须要能感知到对方的反监控策略进行了调整，通知管理员及时处...
Should I embed images as data/base64 in CSS or HTML
... practice? Are there some reasons to avoid this?
It's a good practice usually only for very small CSS images that are going to be used together (like CSS sprites) when IE compatibility doesn't matter, and saving the request is more important than cacheability.
It has a number of notable downsides...
How to detect DIV's dimension changed?
...he div's dimension change event? and How to do that? I currently bind the callback function to the jQuery resize event on the target DIV, however, no console log is outputted, see below:
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Is there any free OCR library for Android? [closed]
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OCR can be pretty CPU intensive, you might want to reconsider doing it on a smart phone.
That aside, to my knowledge the popular OCR libraries are Aspire and Tesseract. Neither are straight up Java, so you're not going to get a drop-in Andro...
Why does visual studio 2012 not find my tests?
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My unittest project targets x64. When I created the project it was originally targeting x86.
After switching to x64 all my unit tests disappeared.
I had to go to the Test Menu -> Test Setting -Default Processor Architecture -> x64.
They still didn't show up.
Did a build.
Still didn't sh...
从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...
...O2O现在还没到风口。宠物行业的根本不在这里，这是源头问题。”与此同时，他对爱狗团的方向也进行了调整。夏军原本做的是宠物O2O，类似于美团的团购模式，将买家导入到线下的商户。而他放弃了O2O做法，现在做的模式不像...
Should I Stop Stopwatch at the end of the method?
...o a Stopwatch isn't doing any work or eating cpu clock cycles between the calls to Start() and Stop(). Start() just sets a timestamp to now and Stop() calculates and saves the time elapsed since that. See source in coreclr: github.com/dotnet/corefx/blob/master/src/…
– Sammi
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Thread vs ThreadPool
...rom the pool rather than one I've explicitly created? I'm thinking specifically of .NET here, but general examples are fine.
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What resources are shared between threads?
...on in an interview what's the difference between a process and a thread. Really, I did not know the answer. I thought for a minute and gave a very weird answer.
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What is the optimal length for user password salt? [closed]
Any salt at all will obviously help when salting and hashing a user's password. Are there any best practices for how long the salt should be? I'll be storing the salt in my user table, so I would like the best tradeoff between storage size and security. Is a random 10 character salt enough? Or ...