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OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...thinning is being used, I don't care from where he took several thresholds idea -- it is just not used here (thus how can it not be a difference ?), the image is resized here, the component measurements are different. "Some dilation-erosion" doesn't give binary edges, otsu is used for that. It is po...
Database design for audit logging
... fields that were edited that you then have to mash up to give the user an idea of what the old record looked like.
So for example, if you had a table called Opportunities to track sales deals, you would actually create two separate tables:
Opportunities
Opportunities_Content (or something like th...
Should a Netflix or Twitter-style web service use REST or SOAP? [closed]
...A totally agree about the question above...terrible question, and about as ideal an example of "subjective and argumentative" as it gets, and certainly couldn't have been more absurd. :P I would make one distinction about SOAP however...I think it fits the bill of "swiss army knife" much better than...
Difference between array_map, array_walk and array_filter
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The idea of mapping an function to array of data comes from functional programming. You shouldn't think about array_map as a foreach loop that calls a function on each element of the array (even though that's how it's implemented...
In Java, when should I create a checked exception, and when should it be a runtime exception? [dupli
...even Errors).
Additionally, checked exceptions break encapsulation.
This idea that checked exceptions should be used for "recoverable" errors is really pie-in-the-sky wishful thinking.
Checked exceptions in Java were an experiment... a failed experiment. We should just cut our losses, admit we m...
Choice between vector::resize() and vector::reserve()
...i); } is pretty robust as far as reserving the space is concerned. I've no idea how many elements will actually be added, but I have an upper bound. Of course when in doubt, with vectors you can just use indexes instead of iterators, the difference is usually negligible.
– Stev...
How to make an Android Spinner with initial text “Select One”?
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@emmby Do you have any idea how to clear the selection after the user set it? I tried refactoring the two invoke() calls into a clearSelection() method, but it doesn't really work. Although the popup list shows the formerly-selected item as unselec...
How to get StackPanel's children to fill maximum space downward?
...wport size, you should be able to bind this to the ScrollViewer’s size. Ideally you would implement IScrollInfo, but that starts to get complicated if you are going to implement all of it properly.
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Rails 4 multiple image or file upload using carrierwave
...e of the create! method. but using create instead just fails silently. Any idea how to have the validation happen on the post reach into the attachments?
– dchess
Jul 26 '16 at 23:51
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When should I use a List vs a LinkedList
...e steps. Specifically timing the inserts and additions would give a better idea. 3) Most importantly, you're adding more than required to a linkedlist. This is a wrong comparison. Spreads wrong idea about linkedlist.
– nawfal
Jul 2 '14 at 22:18
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