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Fastest way to list all primes below N
...t William Hanks for primesfrom2to, primesfrom3to, rwh_primes, rwh_primes1, and rwh_primes2.
Of the plain Python methods tested, with psyco, for n=1000000,
rwh_primes1 was the fastest tested.
+---------------------+-------+
| Method | ms |
+---------------------+-------+
| rwh_prime...
What do all of Scala's symbolic operators mean?
...e method defined on List (though it could be the object of the same name), and :+= is probably the method defined on various Buffer classes.
So, let's see them.
Keywords/reserved symbols
There are some symbols in Scala that are special. Two of them are considered proper keywords, while others are...
startActivityForResult() from a Fragment and finishing child Activity, doesn't call onActivityResult
...bugged the code, i see onActivityresult() of FirstAcivity.Java gets called and onActivityresult() of FragmentA.Java never get called. Please help.
– Mr Roshan Pawar
Jun 13 '13 at 11:46
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Swift 编程语言入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...tive-C的命名参数和动态对象模型。提供了对Cocoa框架和mix-and-match的互操作性。基于这些基础，Swift引入了很多新功能和结合面向过程和面向对象的功能。
Swift对新的程序员也是友好的。他是工业级品质的系统编程语言，却又像脚...
How do I perform HTML decoding/encoding using Python/Django?
... as seen here. Also, you will still want to use the name2codepoint dict to convert each html identity to the actual char it represents.
– Marconius
Jul 9 '12 at 18:43
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Strtotime() doesn't work with dd/mm/YYYY format
...te_from_format('d/m/Y', $srchDate), 'Y/m/d');
This will work for you.
You convert the String into a custom date format where you can specify to PHP what the original format of the String is that had been given to it.
Now that it is a date format, you can convert it to PHP's default date format, whi...
Saving a Numpy array as an image
...
Be careful when converting to jpg since it is lossy and so you may not be able to recover the exact data used to generate the image.
– Feanil
Dec 20 '12 at 15:20
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How to fix error “Updating Maven Project”. Unsupported IClasspathEntry kind=4?
...question in the package explorer pane, and then choosing 'Configure'-> 'Convert to Maven Project')
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Extracting just Month and Year separately from Pandas Datetime column
...ore. Using df.my_date_column.astype('datetime64[M]'), as in @Juan's answer converts to dates representing the first day of each month.
– Nickolay
May 26 '18 at 19:52
4
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Forward declaring an enum in C++
... char or an int, or something else.
From Section 7.2.5 of the ISO C++ Standard:
The underlying type of an enumeration is an integral type that can represent all the enumerator values defined in the enumeration. It is implementation-defined which integral type is used as the underlying type fo...