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How to use the PI constant in C++
I want to use the PI constant and trigonometric functions in some C++ program. I get the trigonometric functions with include <math.h> . However, there doesn't seem to be a definition for PI in this header file.
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What is pseudopolynomial time? How does it differ from polynomial time?
What is pseudopolynomial time ? How does it differ from polynomial time? Some algorithms that run in pseudopolynomial time have runtimes like O(nW) (for the 0/1 Knapsack Problem ) or O(√n) (for trial division ); why doesn't that count as polynomial time?
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How to color System.out.println output? [duplicate]
...but there are third party API's that can handle it
http://www.javaworld.com/javaworld/javaqa/2002-12/02-qa-1220-console.html
Edit: of course there are newer articles than that one I posted, the information is still viable though.
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How to sort a dataframe by multiple column(s)
I want to sort a data.frame by multiple columns. For example, with the data.frame below I would like to sort by column z (descending) then by column b (ascending):
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Break when a value changes using the Visual Studio debugger
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In the Visual Studio 2005 menu:
Debug -> New Breakpoint -> New Data Breakpoint
Enter:
&myVariable
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How to use timeit module
I understand the concept of what timeit does but I am not sure how to implement it in my code.
14 Answers
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How can I stage and commit all files, including newly added files, using a single command?
How can I stage and commit all files, including newly added files, using a single command?
12 Answers
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Git error on commit after merge - fatal: cannot do a partial commit during a merge
...in a conflict. I resolved the conflict and everything is fine now (I used mergetool also).
17 Answers
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How do I make a textbox that only accepts numbers?
I have a windows forms app with a textbox control that I want to only accept integer values. In the past I've done this kind of validation by overloading the KeyPress event and just removing characters which didn't fit the specification. I've looked at the MaskedTextBox control but I'd like a more g...