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How do you do a deep copy of an object in .NET? [duplicate]
...lative performance difference (4.77 seconds for deep nested MemberwiseCopy vs. 39.93 seconds for Serialization). Using nested MemberwiseCopy is almost as fast as copying a struct, and copying a struct is pretty darn close to the theoretical maximum speed .NET is capable of, which is probably quite c...
How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
...iggering layout at the time that a view transform is applied.]
Autolayout vs. View Transforms
Autolayout does not play at all well with view transforms. The reason, as far as I can discern, is that you're not supposed to mess with the frame of a view that has a transform (other than the default id...
std::vector versus std::array in C++
... Yes. There isn't a significant advantage to using new std::array vs new std::vector.
– Mark Lakata
Jan 18 '17 at 18:34
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What is the difference between active and passive FTP?
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Redacted version of my article FTP Connection Modes (Active vs. Passive):
FTP connection mode (active or passive), determines how a data connection is established. In both cases, a client creates a TCP control connection to an FTP server command port 21. This is a standard outgoing c...
C++ - passing references to std::shared_ptr or boost::shared_ptr
... on overuse of shared_ptrs, there wasn't agreement about the pass-by-value-vs.-reference issue.
– Nicol Bolas
Apr 1 '12 at 1:17
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Why do I need 'b' to encode a string with Base64?
....x?
Edit: See http://docs.python.org/release/3.0.1/whatsnew/3.0.html#text-vs-data-instead-of-unicode-vs-8-bit for the gory details of strings in Python 3.x
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What do Clustered and Non clustered index actually mean?
...es to all rows, not just those that are actually duplicates.
The clustered vs non clustered nomenclature is also used for column store indexes. The paper Enhancements to SQL Server Column Stores states
Although column store data is not really "clustered" on any key, we
decided to retain the traditi...
Why C# fails to compare two object types with each other but VB doesn't?
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Per msdn.microsoft.com/en-us/library/cey92b0t(v=vs.110).aspx, in section "Typeless Programming with Relational Comparison Operators": =, along with all the other relational comparison operators such as <, >=, etc., are given special treatment when both or either side...
Performance of foreach, array_map with lambda and array_map with static function
...a bit slower than using the named function. Now, comparing the array loop vs array_map calls, everything in the array loop is interpreted inline, without any call to a function, meaning no context to push/pop, just a JMP at the end of the loop, which likely explains the big difference.
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Error-Handling in Swift-Language
...xceptions are follows:
Syntax is a bit different: do-catch + try + defer vs traditional try-catch-finally syntax.
Exception handling usually incurs much higher execution time in exception path than in success path. This is not the case with Swift 2.0 errors, where success path and error path cost ...