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ApartmentState for dummies
...antees for a class. A COM class can publish what kind of threading requirements it has. And the COM infrastructure makes sure those requirements are met.
This is completely absent in .NET. You can use a Queue<> object for example in multiple threads but if you don't lock properly, you'll h...
How to find where gem files are installed
I can finds gems that are installed using gem list , but it doesn't show me where the gems are installed.
10 Answers
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A std::map that keep track of the order of insertion?
...epresents insertion order
hashed_unique< tag<string_tag>, member<value_t, string, &value_t::s> >
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> values_t;
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How to count occurrences of a column value efficiently in SQL?
...nt because there is no S.cnt, otherwise you get an error: Invalid column name 'cnt'
– KM.
Oct 1 '09 at 14:00
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Why is argc not a constant?
...st whenever possible", I start thinking "why not make these 'constant' parameters const "?.
7 Answers
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What is the maximum depth of the java call stack?
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It depends on the amount of virtual memory allocated to the stack.
http://www.odi.ch/weblog/posting.php?posting=411
You can tune this with the -Xss VM parameter or with the Thread(ThreadGroup, Runnable, String, long) constructor.
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Difference between `data` and `newtype` in Haskell
...presentation
A newtype guarantees that your data will have exactly the same representation at runtime, as the type that you wrap.
While data declares a brand new data structure at runtime.
So the key point here is that the construct for the newtype is guaranteed to be erased at compile time.
E...
Remove unwanted parts from strings in a column
...ing for an efficient way to remove unwanted parts from strings in a DataFrame column.
9 Answers
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Test if a class has an attribute?
I'm trying to do a little Test-First development, and I'm trying to verify that my classes are marked with an attribute:
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Escaping a forward slash in a regular expression
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What context/language? Some languages use / as the pattern delimiter, so yes, you need to escape it, depending on which language/context. You escape it by putting a backward slash in front of it: \/ For some languages (like PHP) you can use other ch...