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Conveniently map between enum and int / String

...alue as part of the enum definition. He then goes on to create a generics-based lookup utility: public class ReverseEnumMap<V extends Enum<V> & EnumConverter> { private Map<Byte, V> map = new HashMap<Byte, V>(); public ReverseEnumMap(Class<V> valueType) { ...
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Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?

... @curiousguy Containing more than one subobject of same base class, ambiguity (override from which base class use), complicated rules of resolving such ambiguity. – Tadeusz Kopec May 22 '13 at 7:54 ...
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Understanding Node.js modules: multiple requires return the same object?

... From the node.js documentation: "Modules are cached based on their resolved filename. Since modules may resolve to a different filename based on the location of the calling module (loading from node_modules folders), it is not a guarantee that require('foo') will always return...
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Why is it impossible to override a getter-only property and add a setter? [closed]

... Because the writer of Baseclass has explicitly declared that Bar has to be a read-only property. It doesn't make sense for derivations to break this contract and make it read-write. I'm with Microsoft on this one. Let's say I'm a new programmer w...
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How do I clear my local working directory in Git? [duplicate]

...ver be sure to NOTE that command will also blow away your local sqlite database -- not undo recent changes, but actually delete it. Sp the "-x" option might NOT ne a good idea depending on what you are trying to do. – jpw Apr 2 '12 at 0:54 ...
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How does MongoDB sort records when no sort order is specified?

...n a Mongo find() query without any sort order specified, what does the database internally use to sort the results? 2 Answe...
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How to process SIGTERM signal gracefully?

... A class based clean to use solution: import signal import time class GracefulKiller: kill_now = False def __init__(self): signal.signal(signal.SIGINT, self.exit_gracefully) signal.signal(signal.SIGTERM, self.exit_gracef...
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What are the specific differences between .msi and setup.exe file?

... An MSI is a Windows Installer database. Windows Installer (a service installed with Windows) uses this to install software on your system (i.e. copy files, set registry values, etc...). A setup.exe may either be a bootstrapper or a non-msi installer. A non-...
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optional local variables in rails partial templates: how do I get out of the (defined? foo) mess?

...opying the code from the OP's link (api.rubyonrails.org/classes/ActionView/Base.html) <% if local_assigns.has_key? :headline %> Headline: <%= headline %> <% end %> -- has_key avoids the nil / false situation, and probably can be shortened to one line like the answer here ...
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Using Java with Nvidia GPUs (CUDA)

...afik/JavaCL : Java bindings for OpenCL: An object-oriented OpenCL library, based on auto-generated low-level bindings http://jogamp.org/jocl/www/ : Java bindings for OpenCL: An object-oriented OpenCL library, based on auto-generated low-level bindings http://www.lwjgl.org/ : Java bindings for Open...