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Best way to define error codes/strings in Java?

I am writing a web service in Java, and I am trying to figure out the best way to define error codes and their associated error strings . I need to have a numerical error code and an error string grouped together. Both the error code and error string will be sent to the client accessing the web ser...
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Single quotes vs. double quotes in Python [closed]

According to the documentation, they're pretty much interchangeable. Is there a stylistic reason to use one over the other? ...
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Reverse engineering from an APK file to a project

I accidently erased my project from Eclipse , and all I have left is the APK file which I transferred to my phone. Is there a way to reverse the process of exporting an application to the .apk file, so I can get my project back? ...
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How can I get a list of all functions stored in the database of a particular schema in PostgreSQL?

I want to be able to connect to a PostgreSQL database and find all of the functions for a particular schema. 9 Answers ...
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How to see top processes sorted by actual memory usage?

I have a server with 12G of memory. A fragment of top is shown below: 12 Answers 12 ...
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Preferred order of writing latitude & longitude tuples in GIS services

When dealing with GIS source code you often need to write latitude and longitude coordinate tuples. 9 Answers ...
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Capture Stored Procedure print output in .NET

Is it possible to capture print output from a T-SQL stored procedure in .NET? 3 Answers ...
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Why is the Fibonacci series used in agile planning poker? [closed]

When estimating the relative size of user stories in agile software development the members of the team are supposed to estimate the size of a user story as being 1, 2, 3, 5, 8, 13, ... . So the estimated values should resemble the Fibonacci series. But I wonder, why? ...
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What is the difference between a database and a data warehouse?

What is the difference between a database and a data warehouse? 13 Answers 13 ...
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Preferred Java way to ping an HTTP URL for availability

I need a monitor class that regularly checks whether a given HTTP URL is available. I can take care of the "regularly" part using the Spring TaskExecutor abstraction, so that's not the topic here. The question is: What is the preferred way to ping a URL in java? ...