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What does “abstract over” mean?
...ala literature, I encounter the phrase "abstract over", but I don't understand the intent. For example , Martin Odersky writes
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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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How can I make an EXE file from a Python program? [duplicate]
...A .py to .exe converter using a simple graphical interface built using Eel and PyInstaller in Python.
py2exe is probably what you want, but it only works on Windows.
PyInstaller works on Windows and Linux.
Py2app works on the Mac.
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What are the relationships between Any, AnyVal, AnyRef, Object and how do they map when used in Java
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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...
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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How do you truncate all tables in a database using TSQL?
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EXEC sp_MSForEachTable 'TRUNCATE TABLE ?'
Couple more links for 2000 and 2005/2008..
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How does the HyperLogLog algorithm work?
I've been learning about different algorithms in my spare time recently, and one that I came across which appears to be very interesting is called the HyperLogLog algorithm - which estimates how many unique items are in a list.
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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 ...
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 do you render primitives as wireframes in OpenGL?
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glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
to switch on,
glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
to go back to normal.
Note that things like texture-mapping and lighting will still be applied to the wireframe lines if they're enabled, w...