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Unable to Cast from Parent Class to Child Class
I am trying to cast from a parent class to a child class but I get an InvalidCastException. The child class only has one property of type int. Does anyone know what I need to do?
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Why should I care about lightweight vs. annotated tags?
I switched from Subversion to Git as my day-to-day VCS last year and am still trying to grasp the finer points of "Git-think".
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How do pointer to pointers work in C?
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14 Answers
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Is it safe to delete a NULL pointer?
Is it safe to delete a NULL pointer?
7 Answers
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Hidden features of Perl?
What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work?
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Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
I work on C++ projects, and I went through Alex Ott's guide to CEDET and other threads about tags in StackOverflow, but I am still confused about how Emacs interfaces with these different tag systems to facilitate autocompletion, the looking up of definitions, navigation of source code base or the...
Why are elementwise additions much faster in separate loops than in a combined loop?
Suppose a1 , b1 , c1 , and d1 point to heap memory and my numerical code has the following core loop.
10 Answers
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Generating a unique machine id
I need to write a function that generates an id that is unique for a given machine running a Windows OS.
15 Answers
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Filter by process/PID in Wireshark
Is there a way to filter/follow a TCP / SSL stream based on a particular process ID using Wireshark ?
11 Answers
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Listing all permutations of a string/integer
A common task in programming interviews (not from my experience of interviews though) is to take a string or an integer and list every possible permutation.
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