How do I check if an object’s type is a particular subclass in C++?

I was thinking along the lines of using typeid() but I don’t know how to ask if that type is a subclass of another class (which, by the way, is abstract) Answer   class Base { public: virtual ~Base() {} }; class D1: public Base {}; class D2: public Base {}; int main(int argc,char* argv[]); … Read more

How to check type of files without extensions? [duplicate]

This question already has answers here: How to find the mime type of a file in python? (18 answers) Closed 4 months ago. The community reviewed whether to reopen this question 3 months ago and left it closed: Original close reason(s) were not resolved I have a folder full of files and they don’t have … Read more

How to check if a file is a valid image file?

I am currently using PIL. from PIL import Image try: im=Image.open(filename) # do stuff except IOError: # filename not an image file However, while this sufficiently covers most cases, some image files like, xcf, svg and psd are not being detected. Psd files throws an OverflowError exception. Is there someway I could include them as … Read more

Can somebody help me identify this Japanese display font?

Font identification websites don’t seem to be able to recognize non-latin characters. Google search also hasn’t given me any results. Answer This is コミックレゲエ (or perhaps レゲエ) from a major type foundry フォントワークス (Fontworks). The only difference between them is the stroke contrast, which is somewhat hard to tell due to the outline effect and … Read more