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Knight's Shortest Path on Chessboard
...
You have a graph here, where all available moves are connected (value=1), and unavailable moves are disconnected (value=0), the sparse matrix would be like:
(a1,b3)=1,
(a1,c2)=1,
.....
And the shortest path of two points in a graph can be found usin...
Updating the list view when the adapter data changes
...tView.setAdapter(adapter);
and after updating the value of a list item, call:
adapter.notifyDataSetChanged();
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How can I extract a good quality JPEG image from a video file with ffmpeg?
...ical file sizes and (to my naked eye) appear the same as without qscale at all.
– felwithe
Jan 28 '15 at 23:03
Can you...
How can I reset a react component including all transitively reachable state?
I occasionally have react components that are conceptually stateful which I want to reset. The ideal behavior would be equivalent to removing the old component and readding a new, pristine component.
...
How to get a Static property with Reflection
...so the key for me was to use the .FlattenHierarchy BindingFlag. I don't really know why I just added it on a hunch and it started working. So the final solution that allows me to get Public Instance or Static Properties is:
obj.GetType.GetProperty(propName, Reflection.BindingFlags.Public _
Or R...
Django. Override save for model
...self._image_changed = True
# Or put whole logic in here
small = rescale_image(self.image,width=100,height=100)
self.image_small=SimpleUploadedFile(name,small_pic)
def get_image(self):
return self._image
image = property(get_image, set_image)
# this is ...
iOS 7 parallax effect in my view controller
... to the orientation of the user’s device. For example, to emulate the parallax effect on the home screen, you can use the subclass UIInterpolationMotionEffect, as explained here and here, just with a few lines of code.
Objective-C:
// Set vertical effect
UIInterpolatingMotionEffect *verticalMoti...
Download data url file
... just drag their zip directly into the browser and it'll let them download all the files within. They can also create new zip files by dragging individual files in.
...
How to disassemble one single function using objdump?
I've got a binary installed on my system, and would like to look at the disassembly of a given function. Preferrably using objdump , but other solutions would be acceptable as well.
...
AtomicInteger lazySet vs. set
...l values for a while, but you'd
like to ensure that structures are eventually GCable. In such
cases, you can get better performance by avoiding
the costs of the null volatile-write. There are a few
other use cases along these lines for non-reference-based
atomics as well, so the method is ...