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Reduce, fold or scan (Left/Right)?

... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers. Draft saved Draft discarded ...
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Useless use of cat?

...tial greps into one, a.s.o.) is crucial and often it can be safely assumed based on the question that the OP really just doesn't know that small tweaks might have huge performance impacts. I fully agree with your point about brain cycles and that's why I find myself using cat regularly even when not...
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Can hash tables really be O(1)?

... keys; your cost depends on your resolution method -- if you do comparison based (BST or List), you will have O(n) operation (recall key is n-bit); if you do 2nd hash, well, you have the same issue if 2nd hash has collision. So O(1) is not 100% guaranteed unless you have no collision (you can improv...
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How to integrate nodeJS + Socket.IO and PHP?

... an author and message, and when you press send it is saved in a mysql database. The idea is to send real time updates, and have a real conversation. ;) We'll use nodeJS for that. I won't talk about PHP code, it is really simple and not interesting here; what I want to show you is how to integrate ...
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is there a css hack for safari only NOT chrome?

...ks.html#safari The test page has many others as well, specifically version-based to further help you differentiate between Chrome and Safari, and also many hacks for Firefox, Microsoft Edge, and Internet Explorer web browsers. NOTE: If something doesn't work for you, check the test page first, but p...
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What's to stop malicious code from spoofing the “Origin” header to exploit CORS?

...ifully by consuming all the resources that it was designed to consume (database calls, sending expensive emails, sending even more expensive sms messages, etc.). When that was done, the server happily sent the spoofed Access-Control-Allow-Origin header back to the browser. The documentation I've re...
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从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术

...7. [3] Dede, C., Nelson, B., Ketelhut, D.J., & Bowman, C.(2003).Design2based research strategies for studying situated learning in a multi2user virtual environment [A].Proceedings of 6 th International Conference on Learning Sciences [C].Santa Monica, California: International Society of the Lea...
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How to use glOrtho() in OpenGL?

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ab load testing

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How can I reliably determine the type of a variable that is declared using var at design time?

...e. We skip all the method bodies. That allows us to quickly build up a database of information about what namespace, types and methods (and constructors, etc) are in the source code of the program. Analyzing every single line of code in every method body would take way too long if you're trying to ...