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C/C++ Struct vs Class
...fault to public in structs—a struct written like a C struct behaves like one.)
While it's possible to fake some OOP in C—for instance, defining functions which all take a pointer to a struct as their first parameter, or occasionally coercing structs with the same first few fields to be "sub/sup...
Please explain some of Paul Graham's points on Lisp
... at (println and ends at the ) far to the right. This is lexed / parsed as one would expect, but already an important point arises: the result is not some special compiler-specific AST representation -- it's just a regular Clojure / Lisp data structure, namely a nested list containing a bunch of sym...
round() for float in C++
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There's no round() in the C++98 standard library. You can write one yourself though. The following is an implementation of round-half-up:
double round(double d)
{
return floor(d + 0.5);
}
The probable reason there is no round function in the C++98 standard library is that it can in f...
Creating a URL in the controller .NET MVC
... UrlHelper; there is a .Url property on the controller which will give you one with the correct RequestContext.
– Tobias J
Nov 14 '13 at 15:34
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Django filter queryset __in for *every* item in list
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Summary:
One option is, as suggested by jpic and sgallen in the comments, to add .filter() for each category. Each additional filter adds more joins, which should not be a problem for small set of categories.
There is the aggregation...
Which version of Perl should I use on Windows? [closed]
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Strawberry Perl is just getting better and better. One problem I've repeatedly had with ActiveState is that my modules sometimes fail to install because I need an upgrade to a core module, but they won't allow that. Thus, everybody who doesn't use Windows can use my code, bu...
Leaflet - How to find existing markers, and delete markers?
...er that way, because each time, the var marker is erased by the latest. So one way to go is to create a global array of marker, and you add your marker in the global array.
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Finding the type of an object in C++
...c_cast<TYPE*> (object);
The dynamic_cast keyword casts a datum from one pointer or reference type to another, performing a runtime check to ensure the validity of the cast.
If you attempt to cast to pointer to a type that is not a type of actual object, the result of the cast will be NULL. If...
Google Maps API v3: Can I setZoom after fitBounds?
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I solved a similar problem in one of my apps. I was a little confused by your description of the problem, but I think you have the same goal I had...
In my app I wanted to plot a one or more markers and ensure the map was showing them all. The problem ...
Python Create unix timestamp five minutes in the future
...'s comment enough. If you're trying to get a UNIX timestamp (and therefore one in UTC), use calendar.timegm.
– Bialecki
Feb 20 '13 at 20:58
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