Are lists mutable in Scala?

List represents linked list in Scala. The Scala List class holds a sequenced, linear list of items. Lists are immutable whereas arrays are mutable in Scala. Lists represents a linked list whereas arrays are flat.

How do I create a mutable list in Scala?

Adding elements in ListBuffer:

1. Add single element to the buffer ListBuffer+=( element)
2. Add two or more elements (method has a varargs parameter) ListBuffer+= (element1, element2., elementN )
3. Append one or more elements (uses a varargs parameter) ListBuffer.append( elem1, elem2, elemN)

What is mutable collection in Scala?

Scala collections systematically distinguish between mutable and immutable collections. A mutable collection can be updated or extended in place. This means you can change, add, or remove elements of a collection as a side effect. Immutable collections, by contrast, never change.

Are Scala lists immutable?

Specific to Scala, a list is a collection which contains immutable data, which means that once the list is created, then it can not be altered. In Scala, the list represents a linked list. In a Scala list, each element need not be of the same data type. immutable package and hence, they are immutable.

What is Scala REPL?

The Scala REPL is a tool (scala) for evaluating expressions in Scala. The scala command will execute a source script by wrapping it in a template and then compiling and executing the resulting program. In interactive mode, the REPL reads expressions at the prompt, wraps them in an executable template, and then compiles and executes the result.

What is Scala sequence?

Scala Seq. Seq is a trait which represents indexed sequences that are guaranteed immutable. You can access elements by using their indexes. It maintains insertion order of elements. Sequences support a number of methods to find occurrences of elements or subsequences.

What is Scala set?

Scala Set is a collection of pairwise different elements of the same type. In other words, a Set is a collection that contains no duplicate elements.