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How to properly use unit-testing's assertRaises() with NoneType objects? [duplicate]
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The problem is the TypeError gets raised 'before' assertRaises gets called since the arguments to assertRaises need to be evaluated before the method can be called. You need to pass a lambda expression like:
self.assertRaises(TypeError, lambda: self.testListNone[:1])
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How to detect the end of loading of UITableView
...here for smoother UI (single cell usually displays fast after willDisplay: call). You could also try it with tableView:didEndDisplayingCell:.
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Will console.log reduce JavaScript execution performance?
...also causes a performance hit. This came to my attention as I was logging "called" within a function that got invoked on hundreds of React components during re-renders. The mere presence of the logging code caused very noticeable stutter during frequent updates.
– Lev
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Difference between method and function in Scala
...ote that, on the JVM, these (method values) are implemented with what Java calls "methods".
A Function Declaration is a def declaration, including type and body. The type part is the Method Type, and the body is an expression or a block. This is also implemented on the JVM with what Java calls "me...
Why use the SQL Server 2008 geography data type?
...eography type stored in SQL Server is also stored with a Spatial Reference ID. These id's can be of different spheres (the earth is 4326). This means that the calculations in SQL Server will actually calculate correctly over the surface of the earth (instead of as-the-crow-flies which could be thr...
Link to “pin it” on pinterest without generating a button
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The Pin It widget builder business.pinterest.com/widget-builder/#do_pin_it_button is also useful for getting some sample code that you can then customise programatically.
– William Denniss
Mar 18 '1...
Creating a Radial Menu in CSS
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Code
The HTML is pretty simple. I'm using the checkbox hack to reveal/ hide the menu.
<input type='checkbox' id='t'/>
<label for='t'>✰</label>
<ul>
<li><a href='#'>☀</a></li>
<li><a href='#'>☃</a></li>
<...
Rails: How does the respond_to block work?
....html
The Responder does NOT contain a method for .html or .json, but we call these methods anyways! This part threw me for a loop.
Ruby has a feature called method_missing. If you call a method that doesn't exist (like json or html), Ruby calls the method_missing method instead.
http://ruby-met...
Check play state of AVPlayer
... selector:@selector(<#The selector name#>)
name:AVPlayerItemDidPlayToEndTimeNotification
object:<#A player item#>];
And to track playing you can:
"track changes in the position of the playhead in an AVPlayer object" by using addPeriodicTimeObserverForInterval:queue:usin...
Is it possible to make abstract classes in Python?
...initions of those methods:
>>> Abstract()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: Can't instantiate abstract class Abstract with abstract methods foo
>>> class StillAbstract(Abstract):
... pass
...
>>> StillAbst...