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python pandas remove duplicate columns
...pandas.core.common.array_equivalent' is deprecated and is no longer public API
– George Fisher
Apr 26 '17 at 12:35
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Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...
...塞对象上可以有非阻塞的调用方式，我们可以通过一定的API去轮询状 态，在适当的时候调用阻塞函数，就可以避免阻塞。而对于非阻塞对象，调用特殊的函数也可以进入阻塞调用。函数select就是这样的一个例子。
阻塞通信
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How do I use Java to read from a file that is actively being written to?
...a channel for locking a part of a file.
http://java.sun.com/javase/6/docs/api/java/nio/channels/FileChannel.html
This function of the FileChannel might be a start
lock(long position, long size, boolean shared)
An invocation of this method will block until the region can be locked
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What are “named tuples” in Python?
...ng with the names separated by spaces, a slightly more readable use of the API:
>>> Student = namedtuple('Student', 'first last grade')
How to use them?
You can do everything tuples can do (see above) as well as do the following:
>>> named_student_tuple = Student('Lisa', '...
Express: How to pass app-instance to routes from a different file?
...adding an express.router() method!
documentation - http://expressjs.com/4x/api.html#router
Example from their new generator:
Writing the route: https://github.com/expressjs/generator/blob/master/templates/js/routes/index.js
Adding/namespacing it to the app:
https://github.com/expressjs/generator/bl...
Android 4.2: back stack behaviour with nested fragments
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this is great answer, working on API level 23/24 and with support lib 24.1.1
– Rinav
Jul 23 '16 at 20:29
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Rails Model, View, Controller, and Helper: what goes where?
...ly belong on a Model class.
I generally think of the Service layer as the API of my applications. My Services layers usually map pretty closely to the requirements of the application I'm creating thus the Service layer acts as a simplification of the more complex interactions found in the lower lev...
What is thread safe or non-thread safe in PHP?
... containing <?php phpinfo(); ?> on your site and look for the Server API entry. This could say something like CGI/FastCGI or Apache 2.0 Handler.
If you also look at the command-line version of PHP -- thread safety does not matter.
Finally, if thread-safety doesn't matter so which version sho...
Calling startActivity() from outside of an Activity?
... intended behavior, and
was enforced on versions lower than Android 7.0 (API level 24). A bug
in Android 7.0 prevented the flag requirement from being enforced.
That means for (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) || (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) it is manda...
Callback to a Fragment from a DialogFragment
... This also works with the onAttach(Context context) introduced added in api 23.
– Santa Teclado
May 2 '18 at 7:57
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