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What are the differences between NP, NP-Complete and NP-Hard?
... those complexity classes.
P
P is a complexity class that represents the set of all decision problems that can be solved in polynomial time.
That is, given an instance of the problem, the answer yes or no can be decided in polynomial time.
Example
Given a connected graph G, can its vertices be ...
What are Aggregates and PODs and how/why are they special?
... implementations) a pointer to the so-called vtable of the class, which is set in the constructor, so brace-initialization would be insufficient. You could figure out the rest of the restrictions in a similar manner as an exercise :).
So enough about the aggregates. Now we can define a stricter set...
Linux: compute a single hash for a given folder & contents?
...
and don't forget to set LC_ALL=POSIX, so the various tools create locale independent output.
– David Schmitt
Feb 15 '09 at 12:28
...
How to un-submodule a Git submodule?
...e Display verbose output"
}
function abort {
echo "$(tput setaf 1)$1$(tput sgr0)"
exit 1
}
function request_confirmation {
read -p "$(tput setaf 4)$1 (y/n) $(tput sgr0)"
[ "$REPLY" == "y" ] || abort "Aborted!"
}
function warn() {
cat << EOF
This script will...
adding noise to a signal in python
... python, you can either
1. Calculate variance based on a desired SNR and a set of existing measurements, which would work if you expect your measurements to have fairly consistent amplitude values.
2. Alternatively, you could set noise power to a known level to match something like receiver noise. R...
Git command to show which specific files are ignored by .gitignore
...' are comments.
# For a project mostly in C, the following would be a good set of
# exclude patterns (uncomment them if you want to use them):
# *.[oa]
# *~
So....
git ls-files --others --ignored --exclude-from=.git/info/exclude
git ls-files -o -i --exclude-from=.git/info/exclude
git ls-files --...
sprintf like functionality in Python
I would like to create a string buffer to do lots of processing, format and finally write the buffer in a text file using a C-style sprintf functionality in Python. Because of conditional statements, I can’t write them directly to the file.
...
Writing string to a file on a new line every time
I want to append a newline to my string every time I call file.write() . What's the easiest way to do this in Python?
10 A...
How to determine the encoding of text?
I received some text that is encoded, but I don't know what charset was used. Is there a way to determine the encoding of a text file using Python? How can I detect the encoding/codepage of a text file deals with C#.
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How to escape a JSON string containing newline characters using JavaScript?
I have to form a JSON string in which a value is having new line character. This has to be escaped and then posted using AJAX call. Can any one suggest a way to escape the string with JavaScript. I am not using jQuery.
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