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Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation
If a field is annotated insertable=false, updatable=false , doesn't it m>me m>an that you cannot insert value nor change the existing value? Why would you want to do that?
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e.printStackTrace equivalent in python
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import traceback
traceback.print_exc()
When doing this inside an except ...: block it will automatically use the current exception. See http://docs.python.org/library/traceback.html for more information.
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Most efficient way to concatenate strings in JavaScript?
In JavaScript, I have a loop that has many iterations, and in each iteration, I am creating a huge string with many += operators. Is there a more efficient way to create a string? I was thinking about creating a dynamic array where I keep adding strings to it and then do a join. Can anyone explain...
How to see if an object is an array without using reflection?
...is an array without using reflection?
And how can I iterate through all items without using reflection?
6 Answers
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How to get the currently logged in user's user id in Django?
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First make sure you have SessionMiddleware and AuthenticationMiddleware middlewares added to your MIDDLEWARE_CLASSES setting.
The current user is in request object, you can get it by:
def sample_view(request):
current_user =...
How do I configure a Python interpreter in IntelliJ IDEA with the PyCharm plugin?
...is a tutorial in the IDEA docs on how to add a Python interpreter in PyCharm, which involves accessing the "Project Interpreter" page. Even after installing the Python plugin, I don't see that setting anywhere.
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Android: how to make an activity return results to the activity which calls it?
I have a Location activity that can be called from many activities, such as Sign up and Order . In the Location activity the user enters his location, so the activity Location will return this new location to that activity which called it.
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How to conditionally push an item in an observable array?
I would like to push a new item onto an observableArray , but only if the item is not already present. Is there any "find" function or recomm>me m>nded pattern for achieving this in KnockoutJS?
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DataContractSerializer doesn't call my constructor?
I just realized som>me m>thing crazy, which I assum>me m>d to be completely impossible : when deserializing an object, the DataContractSerializer doesn't call the constructor !
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What is non-blocking or asynchronous I/O in Node.js?
...pt engines, what is non-blocking I/O or asynchronous I/O? I see this being m>me m>ntioned as an advantage over Java server side implem>me m>ntations.
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