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400 vs 422 response to POST of data

I'm trying to figure out what the correct status code to return on different scenarios with a "REST-like" API that I'm working on. Let's say I have a end point that allows POST'ing purchases in JSON format. It looks like this: ...
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Where do the Python unit tests go?

If you're writing a library, or an app, where do the unit test files go? 18 Answers ...
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Why not use Double or Float to represent currency?

I've always been told never to represent money with double or float types, and this time I pose the question to you: why? ...
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WebRTC - scalable live stream broadcasting / multicasting

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Java 256-bit AES Password-Based Encryption

I need to implement 256 bit AES encryption, but all the examples I have found online use a "KeyGenerator" to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key? I have tried padding it out to 256 bits, but then I get an error saying that the key is too long. ...
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Do while loop in SQL Server 2008

Is there any method for implement do while loop in SQL server 2008? 5 Answers 5 ...
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How to do something to each file in a directory with a batch script

How do you iterate over each file in a directory with a .bat or .cmd file? 6 Answers 6...
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How do you check in python whether a string contains only numbers?

How do you check whether a string contains only numbers? 10 Answers 10 ...
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Delegates in swift?

How does one go about making a delegate, i.e. NSUserNotificationCenterDelegate in swift? 12 Answers ...
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Ruby, remove last N characters from a string?

What is the preferred way of removing the last n characters from a string? 13 Answers ...