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How do you create nested dict in Python?

I have 2 CSV files: 'Data' and 'Mapping': 4 Answers 4 ...
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Creating a dynamic choice field

I'm having some trouble trying to understand how to create a dynamic choice field in django. I have a model set up something like: ...
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Replace all non-alphanumeric characters in a string

I have a string with which i want to replace any character that isn't a standard character or number such as (a-z or 0-9) with an asterisk. For example, "h^&ell`.,|o w]{+orld" is replaced with "h*ell*o*w*orld". Note that multiple characters such as "^&" get replaced with one asterisk. How would I go...
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What is a good Hash Function?

What is a good Hash function? I saw a lot of hash function and applications in my data structures courses in college, but I mostly got that it's pretty hard to make a good hash function. As a rule of thumb to avoid collisions my professor said that: ...
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How to express a NOT IN query with ActiveRecord/Rails?

Just to update this since it seems a lot of people come to this, if you are using Rails 4 look at the answers by Trung Lê` and VinniVidiVicci. ...
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Create a list from two object lists with linq

I have the following situation 8 Answers 8 ...
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How does HTTP file upload work?

When I submit a simple form like this with a file attached: 5 Answers 5 ...
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Intellij IDEA, format all code in a project

I really like IDEA's code formatting, but how do I get it to reformat all the code in a particular project without going through each file? I've found the option to tidy / optimise imports on code before committing it to subversion which is great, but it only seems to apply to files that have otherw...
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Forward host port to docker container

Is it possible to have a Docker container access ports opened by the host? Concretely I have MongoDB and RabbitMQ running on the host and I'd like to run a process in a Docker container to listen to the queue and (optionally) write to the database. ...
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Unable to show a Git tree in terminal

Killswitchcollective.com's old article, 30 June 2009 , has the following inputs and outputs 6 Answers ...