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Java, Classpath, Classloading => Multiple Versions of the same jar/project

I know this may be a silly question for experienced coders. But I have a library (an http client) that some of the other frameworks/jars used in my project require. But all of them require different major versions like: ...
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Difference between socket and websocket?

...e with another application using socket connections. This is new territory for me, so want to be sure that sockets are different than websockets . It seems like they're only conceptually similar. ...
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What is the Scala annotation to ensure a tail recursive function is optimized?

... of the declaration? Does it also work if Scala is used in scripting mode (for instance using :load <file> under REPL)? ...
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How can I get all constants of a type by reflection?

...ierarchy); // Go through the list and only pick out the constants foreach(FieldInfo fi in fieldInfos) // IsLiteral determines if its value is written at // compile time and not changeable // IsInitOnly determines if the field can be set // in the body o...
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Python : List of dict, if exists increment a dict value, if not append a new dict

...s, with counts as values, like: {'http://www.google.fr/' : 1 } urls_d = {} for url in list_of_urls: if not url in urls_d: urls_d[url] = 1 else: urls_d[url] += 1 This code for updating a dictionary of counts is a common "pattern" in Python. It is so common that there is a s...
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nginx missing sites-available directory

..., all the files will be inside sites-available, and you'd create a symlink for them inside sites-enabled for those you want enabled. share | improve this answer | follow ...
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How to get a complete list of object's methods and attributes?

... For the complete list of attributes, the short answer is: no. The problem is that the attributes are actually defined as the arguments accepted by the getattr built-in function. As the user can reimplement __getattr__, sudden...
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What does “Content-type: application/json; charset=utf-8” really mean?

...k at the content and know what to do with it. That's what HTTP headers are for, they tell the recipient what kind of content they're (supposedly) dealing with. Content-type: application/json; charset=utf-8 designates the content to be in JSON format, encoded in the UTF-8 character encoding. Designa...
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Python “raise from” usage

...rinted. See the raise statement documenation: The from clause is used for exception chaining: if given, the second expression must be another exception class or instance, which will then be attached to the raised exception as the __cause__ attribute (which is writable). If the raised exception ...
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Having a private branch of a public repo on GitHub?

... remote add public git@github.com:...) Push branches with commits intended for your public repo to that new public remote. (make sure you don't accidentally commit private-only code) You can bring in changes to your public repo using 'git fetch public' and then merge them locally and push to your pr...