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新浪是如何分析处理32亿条实时日志的？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...闭swap，调整max open files等；App Level的优化如Java运行环境版本的选择，ES_HEAP_SIZE的设置，修改bulk index的queue size等，另外还设置了默认的index template，目的是更改默认的shard，replica数并将string改为not_analyzed，开启doc_values以应对elasti...
NSDate get year/month/day
... can I get the year/month/day of a NSDate object, given no other information? I realize that I could probably do this with something similar to this:
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Can C++ code be valid in both C++03 and C++11 but do different things?
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The answer is a definite yes. On the plus side there is:
Code that previously implicitly copied objects will now implicitly move them when possible.
On the negative side, several examples are listed in the appendix C of the standard. Even though there are many more negative ones than positive, ...
Sound effects in JavaScript / HTML5
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HTML5 Audio objects
You don't need to bother with <audio> elements. HTML 5 lets you access Audio objects directly:
var snd = new Audio("file.wav"); // buffers automatically when created
snd.play();
There's no support for mix...
How to copy text to clipboard/pasteboard with Swift
I'm looking for a clean example of how to copy text to iOS clipboard that can then be used/pasted in other apps.
4 Answers
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Loading/Downloading image from URL on Swift
I'd like to load an image from a URL in my application, so I first tried with Objective-C and it worked, however, with Swift, I've a compilation error:
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What is the best way to solve an Objective-C namespace collision?
...times the initials refer to the project, e.g. Adium prefixes classes with "AI" (as there is no company behind it of that you could take the initials). Apple prefixes classes with NS and says this prefix is reserved for Apple only.
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How would you make a comma-separated string from a list of strings?
...python 2.7 (which you shouldn't by now) then using str will raise an exception if any item in the list has unicode.
– kroiz
May 26 at 13:54
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How do you suppress output in IPython Notebook?
...capture as the first line of the cell. eg
%%capture
print('Hello')
MyFunction()
This simply discards the output, but the %%capture magic can be used to save the output to a variable - consult the docs
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What breaking changes are introduced in C++11?
...ges in C++11 that will cause some old code to stop compiling: the introduction of explicit operator bool() in the standard library, replacing old instances of operator void*() . Granted, the code that this will break is probably code that should not have been valid in the first place, but it's st...