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What __init__ and self do on Python?

...to declare it explicitly. When you create an instance of the A class and call its methods, it will be passed automatically, as in ... a = A() # We do not pass any argument to the __init__ method a.method_a('Sailor!') # We only pass a single argument The __init__ method is roughly w...
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In Python, how do I read the exif data for an image?

...e. Some images are generated without EXIF data. If it is empty programmatically, try opening the image file in a photo editing software to check if it actually has EXIF data. – Gino Mempin Sep 6 at 0:03 ...
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.net implementation of bcrypt

...BSD's Blowfish-based password hashing code, described in "A Future-Adaptable Password Scheme" by Niels Provos and David Mazières. It is a direct port of jBCrypt by Damien Miller, and is thus released under the same BSD-style license. The code is fully managed and should work with any ...
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Empty set literal?

... Actually, set literals have been backported to Python 2.7, so they are not only available strictly in Python 3. – Jim Brissom May 25 '11 at 20:56 ...
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How to convert CFStringRef to NSString?

...n objects with +1 reference counts, meaning that they need to be released (all CF[Type]Create format functions do this). The nice thing is that in Cocoa you can safely use autorelease or release to free them up. share ...
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How do I check if an integer is even or odd? [closed]

... You should optimise this with a look-up table. – Weeble Feb 27 '10 at 2:45 1 ...
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phonegap open link in browser

... As suggested in a similar question, use JavaScript to call window.open with the target argument set to _system, as per the InAppBrowser documentation: <a href="#" onclick="window.open('http://www.kidzout.com', '_system'); return false;">www.kidzout.com</a> This sho...
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How do you delete an ActiveRecord object?

... It's destroy and destroy_all methods, like user.destroy User.find(15).destroy User.destroy(15) User.where(age: 20).destroy_all User.destroy_all(age: 20) Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after...
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How does type Dynamic work and how to use it?

... Scalas type Dynamic allows you to call methods on objects that don't exist or in other words it is a replica of "method missing" in dynamic languages. It is correct, scala.Dynamic doesn't have any members, it is just a marker interface - the co...
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Adding options to a using jQuery?

... Also make sure that display: table; is NOT applied as style to the select-element. This will break the js-code – Gundon Feb 15 '13 at 15:00 ...