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In which case do you use the JPA @JoinTable annotation?

... project_id name name task_id The Project_Tasks table is called a "Join Table". To implement this second solution in JPA you need to use the @JoinTable annotation. For example, in order to implement a uni-directional one-to-many association, we can define our entities as such: Proj...
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Styling text input caret

...nge using Javascript and CSS http://www.dynamicdrive.com/forums/showthread.php?t=17450 It seems a bit hacky to me, but probably the only way to accomplish the task. The main point of the article is: We will have a plain textarea somewhere in the screen out of the view of the viewer and when th...
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How to set versionName in APK filename using gradle?

...ind, but doesn't work well with flavors with different version codes. They all end up with same version code. – weston May 6 '17 at 15:08 2 ...
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'printf' vs. 'cout' in C++

...letely on operator overloading, so there is no issue with custom formats - all you do is define a subroutine taking std::ostream as the first argument and your type as second. As such, there are no namespace problems - as long you have a class (which isn't limited to one character), you can have wor...
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How do I create a namespace package in Python?

In Python, a namespace package allows you to spread Python code among several projects. This is useful when you want to release related libraries as separate downloads. For example, with the directories Package-1 and Package-2 in PYTHONPATH , ...
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Importing from builtin library when module with same name exists

Situation: - There is a module in my project_folder called calendar - I would like to use the built-in Calendar class from the Python libraries - When I use from calendar import Calendar it complains because it's trying to load from my module. ...
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Find all packages installed with easy_install/pip?

Is there a way to find all Python PyPI packages that were installed with easy_install or pip? I mean, excluding everything that was/is installed with the distributions tools (in this case apt-get on Debian). ...
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How to “perfectly” override a dict?

...or other builtins) directly. It often makes no sense, because what you actually want to do is implement the interface of a dict. And that is exactly what ABCs are for. share | improve this answer ...
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Hashing a dictionary?

...e hash(): hash(frozenset(my_dict.items())) This is much less computationally intensive than generating the JSON string or representation of the dictionary. UPDATE: Please see the comments below, why this approach might not produce a stable result. ...
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Elastic Search: how to see the indexed data

...lore your ElasticSearch cluster is to use elasticsearch-head. You can install it by doing: cd elasticsearch/ ./bin/plugin -install mobz/elasticsearch-head Then (assuming ElasticSearch is already running on your local machine), open a browser window to: http://localhost:9200/_plugin/head/ Alte...