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Higher Order Functions in Java?

Higher order functions are those functions that can return functions as their results. The returned function can then be invoked in the same way as you would invoke a normal function. In programming languages like Python, where functional programming is

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Correct Way of Using EntityManager in Singleton EJB

This week and last week I spent a lot of time writing code to implement the persistence feature for our module with EJB 3 at work. This is the first time I was working with EJB so there was quite

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EntityManager with try-with-resource

try-with-resource is the new feature introduced in Java 1.7 to automatically close a resource after using. It basically helps you to avoid a finally block at the end of the try-catch block to close any resource that needs closing like

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