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Android. Fragment getActivity() sometimes returns null
In developer console error reports sometimes I see reports with NPE issue. I do not understand what is wrong with my code. On emulator and my device application works good without forcecloses, however some users get NullPointerException in fragment class when the getActivity() method is called.
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Merge two Git repositories without breaking file history
... need to merge two Git repositories into a brand new, third repository. I've found many descriptions of how to do this using a subtree merge (for example Jakub Narębski's answer on How do you merge two Git repositories? ) and following those instructions mostly works, except that when I commit ...
Programmatically Determine a Duration of a Locked Workstation?
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What columns generally make good indexes?
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Spring MVC @PathVariable with dot (.) is getting truncated
This is continuation of question
Spring MVC @PathVariable getting truncated
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How do HashTables deal with collisions?
I've heard in my degree classes that a HashTable will place a new entry into the 'next available' bucket if the new Key entry collides with another.
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Could someone explain the pros of deleting (or keeping) unused code?
I have heard many times that unused code must be deleted from the project.
However it is not clear for me "why?".
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Make WPF window draggable, no matter what element is clicked
... question is 2 fold, and I am hoping there are easier solutions to both provided by WPF rather than the standard solutions from WinForms (which Christophe Geers provided, before I've made this clarification).
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