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Finding differences between elements of a list
...ngle elements by index is very slow because every index access is a method call in python
numpy.diff is slow because it has to first convert the list to a ndarray. Obviously if you start with an ndarray it will be much faster:
In [22]: arr = np.array(L)
In [23]: %timeit np.diff(arr)
100 loops, bes...
MVC 5 Access Claims Identity User Data
...(user, DefaultAuthenticationTypes.ApplicationCookie);
You should automatically have some Claims populated relating to you Identity.
To add customized claims after a user authenticates you can do this as follows:
var user = userManager.Find(userName, password);
identity.AddClaim(new Claim(ClaimTy...
How to debug JavaScript / jQuery event bindings with Firebug or similar tools?
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There's a nice bookmarklet called Visual Event that can show you all the events attached to an element. It has color-coded highlights for different types of events (mouse, keyboard, etc.). When you hover over them, it shows the body of the event handle...
Ruby on Rails and Rake problems: uninitialized constant Rake::DSL
...o had to do sudo gem install rake to make sure that the rake version I was calling from the command line was not 0.8.7.
– Juno Woods
Mar 14 '12 at 18:07
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UIView Hide/Show with animation
...ton.alpha = 0;
} completion: ^(BOOL finished) {//creates a variable (BOOL) called "finished" that is set to *YES* when animation IS completed.
button.hidden = finished;//if animation is finished ("finished" == *YES*), then hidden = "finished" ... (aka hidden = *YES*)
}];
Swift 2
UIView.animat...
Unable to resolve host “” No address associated with hostname
...ink I have read about similar behavior on Windows.
If you are on Wifi/3G, call your network provider for the correct DNS settings.
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UITapGestureRecognizer - single tap and double tap
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Have tried to use the "Fail" method call on with both recognizers just now again. But still doesn't work. If you have got the double tap thing working before, please share some more of your experience with me.
– Stanley
J...
Hidden Features of Visual Studio (2005-2010)?
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This (called "block select") also works with the keyboard- hold alt+shift then use the arrow keys.
– arolson101
Oct 16 '09 at 16:42
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Force “portrait” orientation mode
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Sure thing, @TusharPandey. If I recall correctly, the one place this caused us grief was was when our activity launched the default image capture intent on the Samsung Galaxy S3. Basically, we just wanted to take a picture and get the results. However, when...
Javascript / Chrome - How to copy an object from the webkit inspector as code
...parse an xml feed into a static javascript object so that a file can run locally, without a server. I've included a screenshot of the object in the chrome inspector window so you can see what I'm trying to do.
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