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B-Tree vs Hash Table

...g is not easy. Its called RUSH - Replication Under Scalable Hashing, and those algorithms are thus called RUSH algorithms. However there may be a point where your index exceeds a tolerable size compared to your hash sizes and your entire index needs to be re-built. Usually this is not a problem, bu...
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Do I set properties to nil in dealloc when using ARC?

... Short answer: no, you do not have to nil out properties in dealloc under ARC. Long answer: You should never nil out properties in dealloc, even in manual memory management. In MRR, you should release your ivars. Nilling out properties means calling setters, which may invoke code that...
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Is it better in C++ to pass by value or pass by constant reference?

... It used to be generally recommended best practice1 to use pass by const ref for all types, except for builtin types (char, int, double, etc.), for iterators and for function objects (lambdas, classes deriving from std::*_function). This was es...
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Simple way to encode a string according to a password?

... to do much work to implement a proper encryption scheme however. First of all, don’t re-invent the cryptography wheel, use a trusted cryptography library to handle this for you. For Python 3, that trusted library is cryptography. I also recommend that encryption and decryption applies to bytes; ...
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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

... .rehash = udp_v4_rehash, .get_port = udp_v4_get_port, .memory_allocated = &udp_memory_allocated, .sysctl_mem = sysctl_udp_mem, .sysctl_wmem = &sysctl_udp_wmem_min, .sysctl_rmem = &sysctl_udp_rmem_min, .obj_size = sizeof(struct udp_sock), .h.udp_table = &udp_tab...
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Android Get Current timestamp?

... From developers blog: System.currentTimeMillis() is the standard "wall" clock (time and date) expressing milliseconds since the epoch. The wall clock can be set by the user or the phone network (see setCurrentTimeMillis(long)), so the time may jump backwards or forwards unpredictably. This c...
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how to mysqldump remote db from local machine

... a database on a remote server, but the server does not have mysqldump installed. I would like to use the mysqldump on my machine to connect to the remote database and do the dump on my machine. ...
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powershell - extract file name and extension

... Any particular infoyou're after? Just pipe a file to Get-Member to reveal all of it;s members or browse to MSDN to find the official help. – Shay Levy Mar 13 '13 at 7:49 add ...
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Google Maps API 3 - Custom marker color for default (dot) marker

...s of other questions similar to this ( here , here and here ), but they all have accepted answers that don't solve my problem. The best solution I have found to the problem is the StyledMarker library, which does let you define custom colours for markers, but I can't get it to use the default m...
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Using async-await on .net 4

... Microsoft released the Async Targeting Pack (Microsoft.Bcl.Async) through Nuget as a replacement for the AsyncCTP. You can read more about it here: http://blogs.msdn.com/b/bclteam/archive/2013/04/17/microsoft-bcl-async-is-now-st...