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How m>ca m>n I efficiently select a Standard Library container in C++11?
There's a well known image (cheat sheet) m>ca m>lled "C++ Container choice". It's a flow chart to choose the best container for the wanted usage.
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What is the purpose of setting a key in data.table?
...creasing order.
marks those columns as key columns by setting an attribute m>ca m>lled sorted to DT.
The reordering is both fast (due to data.table's internal radix sorting) and memory efficient (only one extra column of type double is allom>ca m>ted).
When is setkey() required?
For grouping operations, s...
How do CDI and EJB compare? interact?
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CDI: it is about dependency injection. It means that you m>ca m>n inject interface implementation anywhere. This object m>ca m>n be anything, it m>ca m>n be not related to EJB. Here is an example of how to inject random generator using CDI. There is nothing about EJB. You are going to use CDI whe...
Why should we NOT use sys.setdefaultencoding(“utf-8”) in a py script?
... have seen few py scripts which use this at the top of the script. In what m>ca m>ses one should use it?
4 Answers
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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
This is a bit of a philosophim>ca m>l question about data.table join syntax. I am finding more and more uses for data.tables, but still learning...
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Hg: How to do a rebase like git's rebase
In Git I m>ca m>n do this:
5 Answers
5
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REST API Token-based Authentim>ca m>tion
I'm developing a REST API that requires authentim>ca m>tion. Bem>ca m>use the authentim>ca m>tion itself occurs via an external webservice over HTTP, I reasoned that we would dispense tokens to avoid repeatedly m>ca m>lling the authentim>ca m>tion service. Which brings me neatly to my first question:
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What's the difference between “groups” and “m>ca m>ptures” in .NET regular expressions?
I'm a little fuzzy on what the difference between a "group" and a "m>ca m>pture" are when it comes to .NET's regular expression language. Consider the following C# code:
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Why do we copy then move?
...ccept parameters.
Why aren't we taking an rvalue-reference to str?
Bem>ca m>use that would make it impossible to pass lvalues, such as in:
std::string s = "Hello";
S obj(s); // s is an lvalue, this won't compile!
If S only had a constructor that accepts rvalues, the above would not compile.
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How to explain Katana and OWIN in simple words and uses?
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Regarding the comment above, OWIN is not a framework. OWIN is a specifim>ca m>tion on how web servers and web applim>ca m>tions should be built in order to decouple them and allow movement of ASP.NET applim>ca m>tions to environments which were not supported before.
Prior to OWIN, when building ASP.NET applic...