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Polymorphism with gson
I have a problem deserializing a json string with Gson.
I receive an array of commands. The command can be start, stop , some other type of command. Naturally I have polymorphism, and start/stop command inherit from command.
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Is it possible for a computer to “learn” a regular expression by user-provided examples?
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The book An Introduction to Computational Learning Theory contains an algorithm for learning a finite automaton. As every regular language is equivalent to a finite automaton, it is possible to learn some regular expressions by a program...
Ruby on Rails Callback, what is difference between :before_save and :before_create?
Could you explain in detail what the :before_save and :before_create Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ?
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Can I set null as the default value for a @Value in Spring?
I'm currently using the @Value Spring 3.1.x annotation like this:
5 Answers
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What's the difference between integer class and numeric class in R
I want to preface this by saying I'm an absolute programming beginner, so please excuse how basic this question is.
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How to show popup message like in Stack Overflow
...p message like the one that appears on Stack Overflow when I am not logged in and I try to use voting buttons.
6 Answers
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What issues should be considered when overriding equals and hashCode in Java?
What issues / pitfalls must be considered when overriding equals and hashCode ?
11 Answers
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JPA : How to convert a native query result set to POJO class collection
I am using JPA in my project.
21 Answers
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How to run travis-ci locally
I've just joined a project, and I'm new to travis-ci. I'd rather not have to push every little change to .travis.yml and every little change I make to the source in order to run the build. With jenkins you can download jenkins and run locally. Does travis offer something like this?
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Is it possible to dynamically compile and execute C# code fragments?
I was wondering if it is possible to save C# code fragments to a text file (or any input stream), and then execute those dynamically? Assuming what is provided to me would compile fine within any Main() block, is it possible to compile and/or execute this code? I would prefer to compile it for perfo...