implementation

问题 In a (max) heap it is easy to find the biggest item in O(1) time, but to actually remove it you need complexity of O(log(n)) . So if the insertion and deletion from a heap is both O(log(n)) , what are the advantages of a heap over binary tree for representing a priority queue? 回答1: Heaps use less memory. They can be implemented as arrays and thus there is no overhead for storing pointers. (A binary tree CAN be implemented as an array, but there is likely to be many empty "gaps" which could

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 2 years ago . in the field of scientific simulations (physics) I am thinking about developing some new simulation package in C/C++. What do you think would be the best practices when starting here from scratch? Can you recommend some bibliography? Thanks 回答1: Here's something of a reading

问题 The @encode directive returns a const char * which is a coded type descriptor of the various elements of the datatype that was passed in. Example follows: struct test { int ti ; char tc ; } ; printf( "%s", @encode(struct test) ) ; // returns "{test=ic}" I could see using sizeof() to determine primitive types - and if it was a full object, I could use the class methods to do introspection. However, How does it determine each element of an opaque struct? 回答1: @Lothars answer might be "cynical",

问题 The @encode directive returns a const char * which is a coded type descriptor of the various elements of the datatype that was passed in. Example follows: struct test { int ti ; char tc ; } ; printf( "%s", @encode(struct test) ) ; // returns "{test=ic}" I could see using sizeof() to determine primitive types - and if it was a full object, I could use the class methods to do introspection. However, How does it determine each element of an opaque struct? 回答1: @Lothars answer might be "cynical",

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I had like to implement my own web-server in pure Java the web-server should support only static resources (i.e. html, js, css, pics, movies etc..) Can you recommend a tutorial or an article on how to implement such a thing? should I use few processes or a thread-pool or should I consider a loop-event oriented

问题 valid code: interface Int1{ String str = "123"; } class Pparent{ String str = "123"; } class F extends Pparent implements Int1{ } invalid code add main method to F class: class F extends Pparent implements Int1{ public static void main(String[] args) { System.out.println(str); } } outs Exception in thread "main" java.lang.Error: Unresolved compilation problem: The field str is ambiguous at test.core.F.main(NullReferenceTest.java:45) I don't see striking differs beetwen both variants. I

问题 valid code: interface Int1{ String str = "123"; } class Pparent{ String str = "123"; } class F extends Pparent implements Int1{ } invalid code add main method to F class: class F extends Pparent implements Int1{ public static void main(String[] args) { System.out.println(str); } } outs Exception in thread "main" java.lang.Error: Unresolved compilation problem: The field str is ambiguous at test.core.F.main(NullReferenceTest.java:45) I don't see striking differs beetwen both variants. I

问题 I have a code like this: $sessionOptions = new SessionDbSavehandlerOptions(); $sessionOptions->setDataColumn('data') ->setIdColumn('id') ->setModifiedColumn('modified') ->setLifetimeColumn('lifetime') ->setNameColumn('name'); $application = $event->getApplication(); $serviceManager = $application->getServiceManager(); $dbAdapter = $serviceManager->get('Zend\Db\Adapter\Adapter'); $sessionTableGateway = new TableGateway('zf2_sessions', $dbAdapter); $sessionGateway = new DbTableGateway(

问题 I have a code like this: $sessionOptions = new SessionDbSavehandlerOptions(); $sessionOptions->setDataColumn('data') ->setIdColumn('id') ->setModifiedColumn('modified') ->setLifetimeColumn('lifetime') ->setNameColumn('name'); $application = $event->getApplication(); $serviceManager = $application->getServiceManager(); $dbAdapter = $serviceManager->get('Zend\Db\Adapter\Adapter'); $sessionTableGateway = new TableGateway('zf2_sessions', $dbAdapter); $sessionGateway = new DbTableGateway(

问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 4 years ago . Any one has BK-Tree implementation in C++., 来源： https://stackoverflow.com/questions/3435471/bk-tree-implementation-in-c