Blogs

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:

This article contains a collection of quotes on design from Jonathan Ive (or "Jony Ive", as Steve Jobs called him), Apple designer.

For those who don't know much about him, Mr. Ive is credited with designing almost every Apple product since 1997. Given that very long string of success, I became interested in what Mr. Ive has to say, and to that end, here's a collection of Jonathan Ive design interview quotes I've gathered over the last few years.

I've been keeping notes about the process of writing the Scala Cookbook for O'Reilly, and I thought I'd share a few of those thoughts here today (early February, 2013).

Scala FAQ: Can you share some examples of the Scala for loop syntax?

Sure. I'm going to start with a comparison to Java for loops, because that's what I was just thinking about.

In Java you might write a for loop like this:

for (int i = 0; i < 10; i++) {
  System.out.println(i);
}

The equivalent for loop in Scala looks like this:

for (i <- 1 to 10) {
  println(i)
}

(The use of parentheses isn't necessary in either example, but most for loops will be longer.)

UPDATE: I originally posted this article in January, 2013, and it's now mid-February, 2013, and we're no longer looking for reviewers. I've only kept this page here so people won't get 404 errors.

OLD CONTENT:

Interested in being a reviewer for the Scala Cookbook?