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What is the difference between NaN and None?
...n reason to use NaN (over None) is that it can be stored with numpy's float64 dtype, rather than the less efficient object dtype, see NA type promotions.
# without forcing dtype it changes None to NaN!
s_bad = pd.Series([1, None], dtype=object)
s_good = pd.Series([1, np.nan])
In [13]: s_bad.dtype...
Can't choose class as main class in IntelliJ
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How can I tell if a DOM element is visible in the current viewport?
...iner inside body. For e.g it doesn't work here - agaase.github.io/webpages/demo/isonscreen2.html isElementInViewport(document.getElementById("innerele")). innerele is present inside a container which has scrolling enabled.
– agaase
Dec 8 '13 at 9:04
...
Get the current first responder without using a private API
...rote a category on UIView, which I call on the UIWindow.
The following is based on that and should return the first responder.
@implementation UIView (FindFirstResponder)
- (id)findFirstResponder
{
if (self.isFirstResponder) {
return self;
}
for (UIView *subView in self...
Is it possible to get the non-enumerable inherited property names of an object?
...erties or methods for some instance you could use something like this
var BaseType = function () {
this.baseAttribute = "base attribute";
this.baseMethod = function() {
return "base method";
};
};
var SomeType = function() {
BaseType();
this.someAttribute = "some attrib...
How to disable Django's CSRF validation?
...esn't work just because there is a magic setting buried deep down the code base.
– idursun
Aug 1 '13 at 10:15
...
CORS Access-Control-Allow-Headers wildcard being ignored?
...C-PEP, C-PEP-Info, CONNECT, Cache-Control, Compliance, Connection, Content-Base, Content-Disposition, Content-Encoding, Content-ID, Content-Language, Content-Length, Content-Location, Content-MD5, Content-Range, Content-Script-Type, Content-Security-Policy, Content-Style-Type, Content-Transfer-Encod...
ORA-12505, TNS:listener does not currently know of SID given in connect descriptor
...get started with JDBC, you need to be sure that you can connect to the database using SQL*Plus. If you're not familiar with SQL*Plus, it's a command-line tool for connecting to Oracle databases that has been a standard part of Oracle for a long time and it is included with Oracle XE.
When connecti...
Which iomanip manipulators are 'sticky'?
...ators return an object rather than a stream:
setiosflags
resetiosflags
setbase
setfill
setprecision
setw
This is a common technique to apply an operation to only the next object that is applied to the stream. Unfortunately this does not preclude them from being sticky. Tests indicate that all of ...
Is there a WebSocket client implemented for Python? [closed]
...s = EchoClient('http://localhost:9000/ws')
The client can be Threaded or based on IOLoop from Tornado project. This will allow you to create a multi concurrent connection client. Useful if you want to run stress tests.
The client also exposes the onmessage, opened and closed methods. (WebSocket s...