Is string concatenation in scala as costly as it is in Java?

Question

In Java, it\'s a common best practice to do string concatenation with StringBuilder due to the poor performance of appending strings using the + operator. Is the same practi

Answer 1

I want to add: if you have a sequence of strings, then there is already a method to create a new string out of them (all items, concatenated). It's called mkString.

Example: (http://ideone.com/QJhkAG)

val example = Seq("11111", "2222", "333", "444444")
val result = example.mkString
println(result) // prints "111112222333444444"