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What is an example of the simplest possible Socket.io example?
..., and almost every example I can find on the web (believe me I have looked for hours and hours), has extra stuff that complicates things. A lot of the examples do a bunch of things that confuse me, or connect to some weird database, or use coffeescript or tons of JS libraries that clutter things up....
Append values to query string
... As you can see from my example you could use variable names for the parameters. And that's exactly what it does: it appends 2 parameters to the existing url that I have hardcoded here but they could perfectly fine be dynamic.
– Darin Dimitrov
Jan...
error C2664: “std::list::list(const std::allocator &)”: 不能将参数 1...
...转换为“const std::allocator &”错误日志：error C2664: std::list<_Ty>::list(const std::allocator<_Ty> &): 不能将参数 1 从std::vector<_Ty>转换为const std::...错误日志：
error C2664: “std::list<_Ty>::list(const std::allocator<_Ty> &)”: 不能将参数 1 从
“std::vect...
(HTML) Download a PDF file instead of opening them in browser when clicked
...g it up to user control is better. However, I came to this thread looking for an answer, and the checked "answer' wasn't an answer - it was "you shouldn't do that." To me, that's not an answer to the question. Instead, give a specific answer and also advise.
– user158017
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Iterate keys in a C++ map
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If you really need to hide the value that the "real" iterator returns (for example because you want to use your key-iterator with standard algorithms, so that they operate on the keys instead of the pairs), then take a look at Boost's transform_iterator.
[Tip: when looking at Boost documentatio...
Remove characters except digits from string using Python?
... (a string of length 256) which in this case is the same as ''.join(chr(x) for x in range(256)) (just faster to make;-). .translate applies the translation table (which here is irrelevant since all essentially means identity) AND deletes characters present in the second argument -- the key part.
.t...
Dynamically adding a form to a Django formset with Ajax
I want to automatically add new forms to a Django formset using Ajax, so that when the user clicks an "add" button it runs JavaScript that adds a new form (which is part of the formset) to the page.
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What is the fastest way to compute sin and cos together?
I would like to compute both the sine and co-sine of a value together (for example to create a rotation matrix). Of course I could compute them separately one after another like a = cos(x); b = sin(x); , but I wonder if there is a faster way when needing both values.
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Is there an alternative sleep function in C to milliseconds?
...ION
The usleep() function suspends execution of the calling thread for
(at least) usec microseconds. The sleep may be lengthened slightly by
any system activity or by the time spent processing the call or by the
granularity of system timers.
usleep() takes micro...
Changing a specific column name in pandas DataFrame
I was looking for an elegant way to change a specified column name in a DataFrame .
9 Answers
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