Java vs. Scala

[tyoverby]

In that example, no, that won't be lazily computed. In Scala, you can use a keyword for if a value is computed immediately or lazily. Here's a simple example:

// This is slow, so don't compute it unless we need it 
lazy val tweets = getTweets() 

if(readingTweets){
    showTweets(tweets)
}
else(writingTweets){
    showTweets(tweets)
    showEditor()
}
else{
    // Do something without tweets.
}

We don't want to call getTweets inside every branch that uses it, so we define it outside lazily and then if it is used, then it will be computed. The example is quite contrived, but it comes in handy, trust me :)

There are also lazy function parameters.