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Use numpy array in shared memory for multiprocessing
...()
logger.setLevel(logging.INFO)
# create shared array
N, M = 100, 11
shared_arr = mp.Array(ctypes.c_double, N)
arr = tonumpyarray(shared_arr)
# fill with random values
arr[:] = np.random.uniform(size=N)
arr_orig = arr.copy()
# write to arr from different proce...
How to increment a pointer address and pointer's value?
...you're asking for, e.g.:
#include <stdio.h>
int main() {
int a = 100;
int *p = &a;
printf("%p\n",(void*)p);
++(*p++);
printf("%p\n",(void*)p);
printf("%d\n",a);
return 0;
}
It's not modifying the same thing twice before a sequence point. I don't think it's good style thou...
What is a “callback” in C and how are they implemented?
...* A possible callback */
int overNineThousand(void) {
return (rand() % 1000) + 9001;
}
/* Another possible callback. */
int meaningOfLife(void) {
return 42;
}
/* Here we call PrintTwoNumbers() with three different callbacks. */
int main(void) {
PrintTwoNumbers(&rand);
PrintTwoN...
Why does the MongoDB Java driver use a random number generator in a conditional?
...een new 'questions' would show up, and they would show up in a batch, like 100 of them in a row.
The programmer was happy with how the program was working, but he wanted some way of maybe improving the software in the future, if possible new questions were discovered.
So, the solution was to log u...
How do I find Waldo with Mathematica?
...ch image.
Obtaining enough training examples. SVMs work best with at least 100 examples of each class. Commercial applications of boosting (e.g., the face-focusing in digital cameras) are trained on millions of positive and negative examples.
A quick Google image search turns up some good data -- ...
How can I use Autolayout to set constraints on my UIScrollview?
... So it turns out my attempt to recreate the code in storyboard wasn't 100% correct. The trailing value for the last button should be exactly zero, mirroring H:|-[buttonA]-[buttonB]-[buttonC]-| which isn't very obvious when working in storyboard (or at least wasn't to me) but now after the fact ...
How can I get a Bootstrap column to span multiple rows?
...st element
<ul class="row">
<li class="span4" style="height: 100px"><h1>1</h1></li>
<li class="span4"><h1>2</h1></li>
<li class="span4"><h1>3</h1></li>
<li class="span4"><h1>4</h1></li...
How can I add to List
...ist = new ArrayList<Integer>();
// This will not compile
//list.add(100);
// WORKS, BUT NOT IDEAL
List untypedList = (List)list;
// It will let you add a number
untypedList.add(200);
// But it will also let you add a String! BAD!
untypedList.add("foo");
// YOU PROBABLY WANT THIS
// This is...
Fitting empirical distribution to theoretical ones with Scipy (Python)?
...urn (best_distribution.name, best_params)
def make_pdf(dist, params, size=10000):
"""Generate distributions's Probability Distribution Function """
# Separate parts of parameters
arg = params[:-2]
loc = params[-2]
scale = params[-1]
# Get sane start and end points of distr...
Detail change after Git pull
... git pull
remote: Counting objects: 10, done.
remote: Compressing objects: 100% (6/6), done.
remote: Total 6 (delta 4), reused 0 (delta 0)
Unpacking objects: 100% (6/6), done.
From git@dev.example.com:reponame
a407564..9f52bed branchname -> origin/branchname
Updating a407564..9f52bed
Fast f...