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What's the difference between findAndModify and update in MongoDB?
I'm a little bit confused by the findAndModify method in MongoDB. What's the advantage of it over the update method? For me, it seems that it just returns the item first and then updates it. But why do I need to return the item first? I read the MongoDB: the definitive guide and it says that i...
How ListView's recycling mechanism works
So I have this problem I had before, and naturally I asked for help on here . Luksprog's answer was great because I had no idea about how ListView and GridView optimized itself with recycling Views. So with his advice I was able to change how I added Views to my GridView. Problem is now I have some...
What is the difference between onBlur and onChange attribute in HTML?
When is one called versus the other? Is there a situation were onChange would be called but onBlur would not be called?
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How to join NSArray elements into an NSString?
Given an NSArray of NSStrings, is there a quick way to join them together into a single NSString (with a Separator)?
3 Answ...
LINQ Distinct operator, ignore case?
Given the following simple example:
4 Answers
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How to remove .htaccess password protection from a subdirectory
I have password protected my entire website using .htaccess but I would like to expose one of the sub directories so that it can be viewed without a password.
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Can an enum class be converted to the underlying type?
Is there a way to convert an enum class field to the underlying type? I thought this would be automatic, but apparently not.
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How to make a background 20% transparent on Android
How do I make the background of a Textview about 20% transparent (not fully transparent), where there is a color in the background (i.e. white)?
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What is the difference between NaN and None?
I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
Find method references in Xcode
Is there a way in Xcode to find all the places where a method or property has been been called?
6 Answers
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