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How to customize a Spinner in Android
I want to add a custom height to the dropdown of a Spinner , say 30dp, and I want to hide the dividers of the dropdown list of Spinner .
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Is iterating ConcurrentHashMap values thread safe?
... obtain from a ConcurrentHashMap is designed to be used by a single thread and should not be passed around. This includes the syntactic sugar that the for-each loop provides.
What happens if I try to iterate the map with two threads at the same time?
It will work as expected if each of the thr...
Why is sizeof considered an operator?
Why is sizeof considered an operator and not a function?
10 Answers
10
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What does “program to interfaces, not implementations” mean?
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Interfaces are just contracts or signatures and they don't know
anything about implementations.
Coding against interface means, the client code always holds an Interface object which is supplied by a factory. Any instance returned by the factory would be of type In...
Reshaping data.frame from wide to long format
I have some trouble to convert my data.frame from a wide table to a long table.
At the moment it looks like this:
9 Answe...
How to get a file or blob from an object URL?
...her methods. When an image is dropped, I'm using URL.createObjectURL to convert to an object URL to display the image. I am not revoking the url, as I do reuse it.
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What is a stored procedure?
What is a "stored procedure" and how do they work?
17 Answers
17
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Using scanner.nextLine() [duplicate]
...he workaround is to use your solution or use a pattern to include both CRs and other delimiters.
– James P.
Feb 17 '11 at 17:34
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What are “first class” objects?
...r something else said to be "first class" in a given programming language, and why? In what do they differ from languages where they are not?
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Why does ~True result in -2?
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int(True) is 1.
1 is:
00000001
and ~1 is:
11111110
Which is -2 in Two's complement1
1 Flip all the bits, add 1 to the resulting number and interpret the result as a binary representation of the magnitude and add a negative sign (since the number begins...