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Setting up foreign keys in phpMyAdmin?
I'm setting up a database using phpMyAdmin. I have two tables ( foo and bar ), indexed on their primary keys . I am trying to create a relational table ( foo_bar ) between them, using their primary keys as foreign keys.
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How to join two sets in one line without using “|”
Assume that S and T are assigned sets. Without using the join operator | , how can I find the union of the two sets? This, for example, finds the intersection:
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How to get a tab character?
In HTML, there is no character for a tab, but I am confused as to why I can copy and paste one here: . (You can't see the full width of it, but if you click to edit my question, you will see the character.) If I can copy and paste a tab character, there should be a unicode equivalent that can be ...
Generate a random double in a range
I have two doubles like the following
6 Answers
6
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How to pull specific directory with git
I have a project with git, and I just want to clone or pull a specific directory, like myproject/javascript just like subversion does.
make some changes, commit and push back again.
It's possible?
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What is the difference between std::array and std::vector? When do you use one over other? [duplicat
What is the difference between std::array and std::vector ? When do you use one over other?
6 Answers
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Error: free(): invalid next size (fast):
What is this strange error I'm getting? I'm compiling C++ using g++ on Ubuntu 10.10. It pops up randomly when I run the executable (maybe 2 times in 8 hours, with 10 compiles an hour). However, if I make clean and recompile it goes away most of the time.
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event Action vs event EventHandler
Is there any different between declaring event Action<> and event EventHandler<> .
7 Answers
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How to articulate the difference between asynchronous and parallel programming?
Many platforms promote asynchrony and parallelism as means for improving responsiveness. I understand the difference generally, but often find it difficult to articulate in my own mind, as well as for others.
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Negative weights using Dijkstra's Algorithm
I am trying to understand why Dijkstra's algorithm will not work with negative weights. Reading an example on Shortest Paths , I am trying to figure out the following scenario:
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