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STL or Qt containers?
... (see the std::string COW controversy). Some STL implementations are especially
bad.
provide hashes, which are not available unless you use TR1
The QTL has a different philosophy from the STL, which is well summarized by J. Blanchette: "Whereas STL's containers are optimized for raw speed, Qt's co...
C＋＋模板的特化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...不受任何约束的模板参数，或受到特定的修饰（例如const或者摇身一变成为了指针之类的东东，甚至是经过别的模板类包装之后的模板类型）或完全被指定了下来。
这是网上某个人的一些看法：
模板有两种特化，全特化和偏...
“static const” vs “#define” vs “enum”
...sion for static arrays at function scope; both (2) and (3) can.
Under C99, all of these can be used for local arrays. Technically, using (1) would imply the use of a VLA (variable-length array), though the dimension referenced by 'var' would of course be fixed at size 5.
(1) cannot be used in place...
How can I detect if this dictionary key exists in C#?
...
John SaundersJohn Saunders
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How to use a custom comparison function in Python 3?
...e a workaround, but I think I am going to lose some performance by passing all the comparison operators < > = to middle man, since my original custom sort is written in C , it had around 1/2x speed of default sort.
– YOU
Mar 28 '10 at 5:26
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Saving images in Python at a very high quality
...nd trying to get good figures in a latex document, save as an eps. Specifically, try something like this after running the commands to plot the image:
plt.savefig('destination_path.eps', format='eps')
I have found that eps files work best and the dpi parameter is what really makes them look good ...
How to match a String against string literals in Rust?
...ething else!"),
}
Note that you also have to explicitly handle the catch-all case.
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Deep copy of a dict in python
... @BuvinJ The issue is that json.loads doesn't solve the problem for all use cases where python dict attributes are not JSON serializable. It may help those who are only dealing with simple data structures, from an API for example, but I don't think it's enough of a solution to fully answer th...
Is python's sorted() function guaranteed to be stable?
...s what is expected in this case? Python is going to compare tuples through all elements by default, not just the first "primary" one. If you only want to sort on the first element, you can pass the key parameter explicitly.
– Matias Grioni
Nov 30 '17 at 3:52
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Easy way to turn JavaScript array into comma-separated list?
...ers have indicated with an upvote) but more helpful might have been to actually provide the alternative answer with example code?
– Chris
Jul 8 '12 at 10:06
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