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What are the differences between numpy arrays and matrices? Which one should I use?
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Actually, timeit tests show ndarray operations such as np.dot(array2, array2) are faster than matrix1*matrix2. This makes sense because matrix is a subclass of ndarray which overrides special methods like __mul__. matrix.__mul__ calls np.dot....
How to determine the first and last iteration in a foreach loop?
...ead the section on Booleans for more information. Use the === operator for testing the return value of this function.
– Pang
Jul 25 '16 at 1:54
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How do you migrate an IIS 7 site to another server?
...or Site Package instead of just copying the files over, although I haven't tested this either. But I do know there are file paths in the applicationHost.config that won't necessarily be present on the new server, which would cause it to break. Also, you should probably mention that there can't be AN...
Combined area of overlapping circles
...o make little mistakes in the math. This solution provides a simple way to test correctness.
– Richard
Oct 28 '12 at 9:59
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Where is the C auto keyword used?
...putchar;
auto a;
if (a = n / b) /* assignment, not test for equality */
printn(a, b); /* recursive */
putchar(n % b + '0');
}
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Use curly braces to initialize a Set in Python
...ing python, and I have a novice question about initializing sets. Through testing, I've discovered that a set can be initialized like so:
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“please check gdb is codesigned - see taskgated(8)” - How to get gdb installed with homebrew code si
...S X 10.8.5 aka Mountain Lion.
I am using GDB version 7.7.1.
I compiled my test program with following command:
g++ -o gdb-sample.out -g gdb-sample.cpp
If I entered the command gdb sample.out, I get the same cryptic error message:
"Unable to find Mach task port for process-id 46234: (os/kern...
A cron job for rails: best practices?
... to all your Rails objects just as in a normal controller.
Can develop and test just as you do normal actions.
Can also invoke your tasks adhoc from a simple web page.
Don't consume any more memory by firing up additional ruby/rails processes.
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When do you use varargs in Java?
...pt.
Also when the parameters' type is going to vary then using "Object...test" will simplify the code a lot.
For example:
public int calculate(int...list) {
int sum = 0;
for (int item : list) {
sum += item;
}
return sum;
}
Here indirectly an array of int type (list) i...
C++ sorting and keeping track of indexes
...that of std::sort except for an index container to receive sorted indexes.
testing:
int a[] = { 3, 1, 0, 4 } ;
std::vector<size_t> indexes ;
argsort(a, a + sizeof(a) / sizeof(a[0]), std::less<int>(), indexes) ;
for (size_t i : indexes) printf("%d\n", int(i)) ;
you should get 2 1 0 3.
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