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Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
...portant (so it doesn't matter which order to aggregate each of the results from each of the chunks). Strictly speaking commutativity is not necessary for parallelization, for example distributed sorting algorithms, it just makes the logic easier because you don't need to give your chunks an ordering...
Binary search (bisection) in Python
...
from bisect import bisect_left
def binary_search(a, x, lo=0, hi=None): # can't use a to specify default for hi
hi = hi if hi is not None else len(a) # hi defaults to len(a)
pos = bisect_left(a, x, lo, hi) # fin...
Start thread with member function
...ream>
class bar {
public:
void foo() {
std::cout << "hello from member function" << std::endl;
}
};
int main()
{
std::thread t(&bar::foo, bar());
t.join();
}
EDIT:
Accounting your edit, you have to do it like this:
std::thread spawn() {
return std::thread(&a...
How do you unit test private methods?
...h the public interface. If they actually perform functions that are hidden from the user (i.e. the unit test), this is probably bad).
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How to write a multidimensional array to a text file?
...s in one line, I'm just being verbose to clarify things):
# Read the array from disk
new_data = np.loadtxt('test.txt')
# Note that this returned a 2D array!
print new_data.shape
# However, going back to 3D is easy if we know the
# original shape of the array
new_data = new_data.reshape((4,5,10))
...
Swift compiler segmentation fault when building
...extension to the class that's giving you problems.
Move a group of methods from the main file to SegFaultDebugger.swift.
Compile.
At this point, one of three things happens:
You still get the segfault in the original file: Move the methods from SegFaultDebugger.swift back to the original file an...
How to set a cookie for another domain
...setcookie fuction will result in a cookie header being sent to the browser from b.com. a.com is not able to send a cookie header from b.com.
– qbert220
Feb 26 '13 at 13:23
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Using querySelector with IDs that are numbers
From what I understand the HTML5 spec lets you use IDs that are numbers like this.
5 Answers
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How can I repeat a character in Bash?
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If you functionalise this it's best to rearrange it from $s%.0s to %.0s$s otherwise dashes cause a printf error.
– KomodoDave
Jul 30 '14 at 7:35
6
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How to make an immutable object in Python?
...le creates a type similar to what I described in this answer, i.e. derived from tuple and using __slots__. It is available in Python 2.6 or above.
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