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When would you use a WeakHashMap or a WeakReference?

...mplementation of so I'm trying to figure out what the use case for them is and how the implementation would work. When have you needed to use a WeakHashMap or WeakReference and how was it used? ...
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Git - Undo pushed commits

...in a remote repository, synchronized with a local repository (development) and the server one (prod). I've been making some commited changes already pushed to remote and pulled from the server. Now, I want to undo those changes. So I could just git checkout to the commit before the changes and com...
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Is there a performance impact when calling ToList()?

...uge list, copying chunks of memory is quite a fast operation to perform. Handy tip, As vs To You'll notice in LINQ there are several methods that start with As (such as AsEnumerable()) and To (such as ToList()). The methods that start with To require a conversion like above (ie. may impact perform...
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What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java

... I'll disagree with Chris's answer in one regard. The classes Any, AnyRef and AnyVal are classes. But they don't appear as classes in bytecode, because of intrinsic limitations of the JVM. This arises out of the fact that not everything in Java is an object. In addition to objects, there are primi...
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How to parse a string to an int in C++?

...at's the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero ). ...
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How to modify a text file?

I'm using Python, and would like to insert a string into a text file without deleting or copying the file. How can I do that? ...
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What is the proper declaration of main?

... signature of the main function in C++? What is the correct return type, and what does it mean to return a value from main ? What are the allowed parameter types, and what are their meanings? ...
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BackgroundWorker vs background Thread

...a form that has an infinite (while(true)) loop. In this loop I use WaitHandle.WaitAny to keep the thread snoozing until something of interest happens. One of the event handles I wait on is a " StopThread " event so that I can break out of the loop. This event is signaled when from my overridden ...
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What is output buffering?

What is output buffering and why is one using it in PHP? 7 Answers 7 ...
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How do you truncate all tables in a database using TSQL?

... EXEC sp_MSForEachTable 'TRUNCATE TABLE ?' Couple more links for 2000 and 2005/2008.. share | improve this answer | follow | ...