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Finding ALL duplicate rows, including “elements with smaller subscripts”
R's duplicated returns a vector showing whether each element of a vector or data frame is a duplicate of an element with a smaller subscript. So if rows 3, 4, and 5 of a 5-row data frame are the same, duplicated will give me the vector
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Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
I was using an UICollectionView in Swift but I get when I try to change the text of the cell's label.
13 Answers
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How can I use pointers in Java?
I know Java doesn't have pointers, but I heard that Java programs can be created with pointers and that this can be done by the few who are experts in java. Is it true?
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Hamcrest compare collections
I'm trying to compare 2 lists:
7 Answers
7
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Why does C# have break if it's not optional? [duplicate]
When I create a switch statement in VS2008 C# like this (contrived):
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4
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How do you parse and process HTML/XML in PHP?
How can one parse HTML/XML and extract information from it?
30 Answers
30
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Which one is the best PDF-API for PHP? [closed]
Which one of these is the best PDF-API for PHP?
9 Answers
9
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How to convert string representation of list to a list?
I was wondering what the simplest way is to convert a string list like the following to a list :
15 Answers
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Proper use of beginBackgroundTaskWithExpirationHandler
I'm a bit confused about how and when to use beginBackgroundTaskWithExpirationHandler .
5 Answers
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How to convert Set to Array?
Set seems like a nice way to create Arrays with guaranteed unique elements, but it does not expose any good way to get properties, except for generator [Set].values, which is called in an awkward way of mySet.values.next() .
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