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How to check type of files without extensions in python?

I have a folder full of files and they don't have an extension. How can I check file types? I want to check the file type and change the filename accordingly. Let's assume a function filetype(x) returns a file type like png . I want to do this: ...
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Superscript in markdown (Github flavored)?

... to write O(n^2) sensibly, I would just type O(n<sup>2</sup>), and it would appear as O(n<sup>2</sup>). Nice. Now why didn't that work on SO markdown? – phonetagger Apr 2 '15 at 17:19 ...
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ASP.NET Temporary files cleanup

...y .NET applications you run on the server. For background, see the Understanding ASP.NET dynamic compilation article on MSDN. share | improve this answer | follow ...
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How do I change the background color of a plot made with ggplot2

... See here for more theme details Quick reference sheet for legends, axes and themes. share | improve this answer | follow | ...
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What is meant by Resource Acquisition is Initialization (RAII)?

... It's a really terrible name for an incredibly powerful concept, and perhaps one of the number 1 things that C++ developers miss when they switch to other languages. There has been a bit of a movement to try to rename this concept as Scope-Bound Resource Management, though it doesn't seem...
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Best design for a changelog / auditing database table? [closed]

... Who the heck created/updated/deleted a record with ID=X in the table Foo and when? So, in order to be able to answer such questions quickly (using SQL), we ended up having two additional columns in the audit table object type (or table name) object ID That's when design of our audit log reall...
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How to return an array from JNI to Java?

I am attempting to use the android NDK. 4 Answers 4 ...
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Is there common street addresses database design for all addresses of the world? [closed]

I am a programmer and to be honest don't know street address structures of the world, just how in my country is structured :) so which is the best and common database design for storing street addresses? It should be so simple to use, fast to query and dynamic to store all street addresses of the w...
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Associating enums with strings in C#

...t would be a tiny bit slower, but this would in most cases be neglectable. And it wouldn't have the exact same behaviour in the editor. E.G.: switching over this one wouldn't automatically fill in a case for each possibility. Other than those minor points, I think this is probably a rather simple so...
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Failed to load resource: net::ERR_INSECURE_RESPONSE

...uming your frame's URL is https://www.domain.com, open a new tab in chrome and go to https://www.domain.com. Chrome will ask you to accept the SSL certificate. Accept it. Then, if you reload your page with your frame, you could see that now it works The problem as you can guess, is that each visit...