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When do we have to use copy constructors?

...ill be copied), so the first to be destroyed copy sharing the buffer will call delete[] successfully and the second will run into undefined behavior. You need deep copying copy constructor (and assignment operator as well). Class::Class( const Class& another ) { stored = new char[strlen(ano...
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Alphabet range in Python

...gt;>> string.ascii_lowercase 'abcdefghijklmnopqrstuvwxyz' If you really need a list: >>> list(string.ascii_lowercase) ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'] And to do it with range >&g...
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Why does range(start, end) not include end?

... Gah! I don't use Ruby, but I can imagine that 1..10 vs 1...10 being hard to distinguish between when reading code! – moinudin Dec 21 '10 at 23:04 6 ...
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PHP Session Fixation / Hijacking

...cker explicitly sets the session identifier of a session for a user. Typically in PHP it's done by giving them a url like http://www.example.com/index...?session_name=sessionid. Once the attacker gives the url to the client, the attack is the same as a session hijacking attack. There are a few way...
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Generate random numbers using C++11 random library

... functions and why not to use rand(). In it, he included a slide that basically solves your question. I've copied the code from that slide below. You can see his full talk here: http://channel9.msdn.com/Events/GoingNative/2013/rand-Considered-Harmful #include <random> #include <iostream&g...
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“java.lang.OutOfMemoryError: PermGen space” in Maven build [duplicate]

...etting this error while building Maven project, I increased MAVEN_OPTS but all the same, I found some similar posts but they are refering to something else. How do I fix this? ...
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Regular Expression: Any character that is NOT a letter or number

... @sbmaxx I want to replace all except &, (, ) these characters. how could i add this condition in the current regex. – K Pal Feb 21 '19 at 11:24 ...
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Custom thread pool in Java 8 parallel stream

Is it possible to specify a custom thread pool for Java 8 parallel stream ? I can not find it anywhere. 15 Answers ...
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What is the curiously recurring template pattern (CRTP)?

... curiously recurring, isn't it? :) Now, what does this give you? This actually gives the X template the ability to be a base class for its specializations. For example, you could make a generic singleton class (simplified version) like this template <class ActualClass> class Singleton { ...
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Pass Additional ViewData to a Strongly-Typed Partial View

...lso like to provide it with some additional ViewData which I create dynamically in the containing page. How can I pass both my strongly typed object and my custom ViewData to the partial view with the RenderPartial call? ...