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How do you get the logical xor of two variables in Python?
... Although this is clever and short, I'm not convinced it's clean. When someone reads this construct in the code, is it immediately obvious to them that this is an xor operation? I felt obliged to add a comment - a sign for me that I'm writing unclear code and try to apologise with a comment.
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PHP Session Fixation / Hijacking
...ts the session identifier of a session for a user. Typically in PHP it's done by giving them a url like http://www.example.com/index...?session_name=sessionid. Once the attacker gives the url to the client, the attack is the same as a session hijacking attack.
There are a few ways to prevent sessi...
How do I obtain a Query Execution Plan in SQL Server?
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There are a number of methods of obtaining an execution plan, which one to use will depend on your circumstances. Usually you can use SQL Server Management Studio to get a plan, however if for some reason you can't run your query in SQL Server Management Studio then you might find it helpful...
Why would you use String.Equals over ==? [duplicate]
...was introduced to a large codebase and noticed all string comparisons are done using String.Equals() instead of ==
8 A...
Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
...p its code a good deal, with relatively low loss of safety (as long as the one guarantee held, it would be safe).
(Edit) To be clear though: regular optionals are nearly always preferable.
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Why should I use IHttpActionResult instead of HttpResponseMessage?
...t because your existing code builds a HttpResponseMessage that doesn't fit one of the canned responses. You can however adapt HttpResponseMessage to IHttpActionResult using the canned response of ResponseMessage. It took me a while to figure this out, so I wanted to post it showing that you don't ...
Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...understand the difference between Iterable and Traversable traits. Can someone explain ?
4 Answers
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How to change the name of a Django app?
...lt;newAppName>_modelName. For mysql too I think it is the same (as mentioned by @null_radix)
(For Django >= 1.7) Update the django_migrations table to avoid having your previous migrations re-run: UPDATE django_migrations SET app='<NewAppName>' WHERE app='<OldAppName>'. Note: there...
What is the best algorithm for overriding GetHashCode?
...) == XorHash(y, x) for all x, y
By the way, the earlier algorithm is the one currently used by the C# compiler for anonymous types.
This page gives quite a few options. I think for most cases the above is "good enough" and it's incredibly easy to remember and get right. The FNV alternative is sim...
Algorithm to return all combinations of k elements from n
.... Let's say {1,2,3} we can say that the difference between the elements is one and in order and minimal. {1,2,4} has one change and is lexicographically number 2. So the number of 'changes' in the last place accounts for one change in the lexicographical ordering. The second place, with one change {...