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Is there a way to instantiate objects from a string holding their class name?
...f. C++ has no mechanism to create objects whose types are determined at runtime. You can use a map to do that mapping yourself, though:
template<typename T> Base * createInstance() { return new T; }
typedef std::map<std::string, Base*(*)()> map_type;
map_type map;
map["DerivedA"] = &a...
Argmax of numpy array returning non-flat indices
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This will iterate the array three times, not only twice. One time to find the maximum, a second time to build the result of ==, and a third time to extract the True values from this result. Note that there might be more than one item equal to the maximum.
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Using Pylint with Django
...I like the idea of a Django-specific pylint, but it seems a big buggy last time I tried it.
– Wernight
Jul 20 '10 at 22:23
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How can I convert a comma-separated string to an array?
...ne value, and we can also check
// the length of the string or time and cross-check too.
ResultArray = [CommaSepStr];
}
}
return ResultArray;
}
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Pointer to pointer clarification
...means the same as "assign to ip1". Since you didn't assign to ipp a second time, it didn't change!
If you wanted to change ipp then you'll have to actually assign to ipp:
ipp = &ip2;
for instance.
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Git branching: master vs. origin/master vs. remotes/origin/master
... (stolen from Torek):
origin/master is "where master was over there last time I checked"
master is "where master is over here based on what I have been doing"
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Threads vs Processes in Linux
...ces are shared. A task can also unshare() resources at any later point in time.
– ephemient
Jun 18 '14 at 14:28
4
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MySQL offset infinite rows
...lly want is to grab them in increments of 100 million and loop 184 billion times.
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Clear the cache in JavaScript
...n. It never clears the original page from the cache as it simply appends a time stamp to the new request, and if there are other calls made asynchronously by this page, those requests will NOT have their caching behaviors disabled. Eg. If you refresh a page with reload(true) that loads some html, an...
Filtering collections in C#
...s where performance matters. (FWIW, I got results from factor 7 to 50 more time needed by Linq and/or IEnumerable, generally)
– Philm
May 9 '17 at 17:33
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