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Objective-C: difference between id and void *
...
void * means "a reference to some random chunk o' memory with untyped/unknown contents"
id means "a reference to some random Objective-C object of unknown class"
There are additional semantic differences:
Under GC Only or GC Supported modes, the compiler will emit write barriers for references...
Using IPython notebooks under version control
...your git history.
Although this can probably be adapted to other VCSs, I know it doesn't satisfy your requirements (at least the VSC agnosticity). Still, it is perfect for me, and although it's nothing particularly brilliant, and many people probably already use it, I didn't find clear instructions...
How do I prevent the iPhone screen from dimming or turning off while my application is running?
... dim and the customer needs to press the home button to wake the screen. I now put this code into a timer that fires every 2.5 hours to reset the idle timer, hopefully this will work.
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improv...
Upgrade python in a virtualenv
...ay try to create a new virtualenv on top of the old one. You just need to know which python is going to use your virtualenv (you will need to see your virtualenv version).
If your virtualenv is installed with the same python version of the old one and upgrading your virtualenv package is not an op...
CSS fixed width in a span
...f2">The active goldfish</div><div class="f3"></div>
Now I see you need to use spans and lists, so we need to rewrite this a little bit:
<html><head>
<style type="text/css">
span.f1 { display: block; float: left; clear: left; width: 60px; }
li { l...
Android: AsyncTask vs Service
...syncTask and Loaders but nothing about Services ? Are Services just not known very well or are they deprecated or have some bad attributes or something? What are the differences?
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Scroll to a div using jquery
...nts, like object.click().
Third, scrollTo is a plugin in jQuery. I don't know if you have the plugin installed. You can't use scrollTo() without the plugin. In this case, the functionality you desire is only 2 lines of code, so I see no reason to use the plugin.
Ok, now on to a solution.
The code...
Python vs Cpython
...OAD_FAST 1 (y)
34 BINARY_ADD
36 RETURN_VALUE
Now, let's have a look at the above code. Lines 1 to 6 are a function definition. In line 8, we import the 'dis' module which can be used to view the intermediate Python bytecode (or you can say, disassembler for Python bytec...
What does 'super' do in Python?
... to super and the correct method arguments right can be difficult. If you know you're using super correctly with single inheritance, that makes debugging less difficult going forward.
Dependency Injection
Other people can use your code and inject parents into the method resolution:
class SomeBase...
How is the default submit button on an HTML form determined?
...ng, try to avoid relying on any particular behaviour. If you really must know, you can probably find out the behaviour of the various browser versions but when I investigated this a while back there were some quite convoluted conditions (which of course are subject to change with new browser versio...