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How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?
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ECB should not be used if encrypting more than one block of data with the same key.
CBC, OFB and CFB are similar, however OFB/CFB is better because you only need encryption and not decryption, which can save code space.
CTR is used if you want good parallelization (ie. speed), instead of CB...
How can I detect if the user is on localhost in PHP?
...ds, how can I tell if the person using my web application is on the server it resides on? If I remember correctly, PHPMyAdmin does something like this for security reasons.
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Creating an empty list in Python
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Here is how you can test which piece of code is faster:
% python -mtimeit "l=[]"
10000000 loops, best of 3: 0.0711 usec per loop
% python -mtimeit "l=list()"
1000000 loops, best of 3: 0.297 usec per loop
However, in practice, this initialization is most likely an extremely small part of you...
Python in Xcode 4+?
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I figured it out! The steps make it look like it will take more effort than it actually does.
These instructions are for creating a project from scratch. If you have existing Python scripts that you wish to include in this project, yo...
How to empty a list?
It seems so "dirty" emptying a list in this way:
7 Answers
7
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When is it better to use an NSSet over an NSArray?
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When the order of the items in the collection is not important, sets offer better performance for finding items in the collection.
The reason is that a set uses hash values to find items (like a dictionary) while an array has to iterate over its ...
Stop Chrome Caching My JS Files
I will make a change to my JS files but it won't really change in the browser, I have to rename the files every time so that it reloads it. Is there some sort of .htaccess command I can add or something to make it stop caching?
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How to configure Mac OS X term so that git has color? [closed]
I've seen a Mac OS X git demo online in which it's configured to have multiple colors.
6 Answers
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When & why to use delegates? [duplicate]
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I agree with everything that is said already, just trying to put some other words on it.
A delegate can be seen as a placeholder for a/some method(s).
By defining a delegate, you are saying to the user of your class, "Please feel fr...
Reset Entity-Framework Migrations
I've mucked up my migrations, I used IgnoreChanges on the initial migration, but now I want to delete all my migrations and start with an initial migration with all of the logic.
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