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How to Correctly Use Lists in R?
...ate the 'switch' statement in C++, Java, etc. in languages that don't have one; probably a good way to do this in R when i need to). +1
– doug
Jan 12 '10 at 23:30
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Is there an MD5 Fixed Point where md5(x) == x?
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True, if you had to try every one. But you would only have to try every possible input to verify that there was no fixed point. If there is a fixed point (and Adam Rosenfield's answer suggests that there might be) then one lucky guess is all that's needed...
C# Lambda expressions: Why should I use them?
...tate to the function without adding parameters to the function or creating one-time-use objects.
Expression trees are a very powerful new feature of C# 3.0 that allow an API to look at the structure of an expression instead of just getting a reference to a method that can be executed. An API just ...
Function vs. Stored Procedure in SQL Server
...ments). Functions are not allowed to change anything, must
have at least one parameter, and they must return a value. Stored
procs do not have to have a parameter, can change database objects,
and do not have to return a value.
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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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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 ...
What is the simplest SQL Query to find the second largest value?
...this will not return a result if there are no records before the requested one.
– andig
Oct 8 '15 at 11:42
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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...
Count number of days between two dates
...ing that end_date and start_date are both of class ActiveSupport::TimeWithZone in Rails, then you can use:
(end_date.to_date - start_date.to_date).to_i
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Why doesn't Java allow overriding of static methods?
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There were two considerations driving Java's design that impacted this. One was a concern with performance: there had been a lot of criticism of Smalltalk about it being too slow (garbage collection and polymorphic calls being part of that) and Java's creators were determined to avoid that. Anoth...