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How to move up a directory with Terminal in OS X

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Why does “_” (underscore) match “-” (hyphen)?

...you are in a pattern context. e.g. inside a LIKE statement. When replacing all _ with an - : UPDATE sys_file set identifier = REPLACE(identifier, '_', '-') WHERE identifier LIKE '%\_%';. Notice the escaping inside LIKE and no escaping inside REPLACE. (I find it strange though that you are not in a p...
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What is the type of lambda when deduced with “auto” in C++11?

... The type of a lambda expression is unspecified. But they are generally mere syntactic sugar for functors. A lambda is translated directly into a functor. Anything inside the [] are turned into constructor parameters and members of the functor object, and the parameters inside () are turned ...
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Best PHP IDE for Mac? (Preferably free!) [closed]

...wdown on Mac IDE's for PHP NetBeans Free! Plus, the best functionality of all offerings. Includes inline database connections, code completion, syntax checking, color coding, split views etc. Downside: It's a memory hog on the Mac. Be prepared to allow half a gig of memory then you'll need to shu...
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Getting the docstring from a function

... On ipython or jupyter notebook, you can use all the above mentioned ways, but i go with my_func? or ?my_func for quick summary of both method signature and docstring. I avoid using my_func?? (as commented by @rohan) for docstring and use it only to check th...
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How many socket connections can a web server handle?

...am. Today, arbitrarily, let's say i7 (4 core) with 8GB of RAM. A good firewall/router to match. No virtual limit/governor - ie. Linux somaxconn, IIS web.config... No dependency on other slower hardware - no reading from harddisk, because it would be the lowest common denominator and bottleneck, not ...
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Difference between CR LF, LF and CR line break types?

... It's really just about which bytes are stored in a file. CR is a bytecode for carriage return (from the days of typewriters) and LF similarly, for line feed. It just refers to the bytes that are placed as end-of-line markers. Way m...
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How well is Unicode supported in C++11?

...ization library Input/output library Regular expressions library I think all but the first one provide terrible support. I'll get back to it in more detail after a quick detour through your other questions. Does std::string do what it should? Yes. According to the C++ standard, this is what ...
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How do I download a file over HTTP using Python?

I have a small utility that I use to download an MP3 file from a website on a schedule and then builds/updates a podcast XML file which I've added to iTunes. ...
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Fastest way to remove first char in a String

... | edited Jul 11 '10 at 7:02 answered Jul 11 '10 at 6:44 ...