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Scala case class FAQ: When you create a case class in Scala, a copy method is generated for your case class. What does this copy method do?

In short, it lets you make a copy of an object, where a "copy" is different than a clone, because with a copy you can change fields as desired during the copying process.

To demonstrate this, let's create an Employee class as a case class:

When you want to create a Play Framework template function, you can find some examples on the Scala Templates page. There you'll find these two examples.

First, assuming you have a Product model defined something like this:

case class Product(var name: String, var price: BigDecimal)

The first template looks like this:

Scala offers a cool feature where you can rename a class when you import it, including both Scala and Java classes. The basic syntax to rename a class on import looks like this:

import scala.collection.mutable.{Map => MMap}

and this:

import java.util.{HashMap => JavaMap}

If all you needed to know, I hope those "rename on import" syntax examples were helpful.

Why rename a class on import?

An interesting question is, "Why would I want to rename a class on import?"

Android FAQ: Can you share some source code for an Android send email method?

If you need a simple Android 'send email' function/method, this source code should do the trick for you:

MySQL backup FAQ: How do I back up a MySQL database?

I can't speak about backing up MySQL databases that are modified twenty-four hours a day seven days a week, but on all the MySQL databases I currently work with, there are always times when I can guarantee that there won't be any SQL INSERTs, DELETEs, or UPDATEs occurring, so I find it's really easy to perform a MySQL backup using the mysqldump utility program. Here's how it works.