Question

Scala中Array和List的区别

Answer 1

Arrays are mutable, indexed collections of values. Array[T] is Scala's representation for Java's T[].

Array：
可变
用下标访问，利于随机访问
是Java数组的一种表示

List is a class for immutable linked lists representing ordered collections
of elements of type A.This class comes with two implementing case classes scala.Nil and scala.:: that implement the abstract members isEmpty, head and tail.This class is optimal for last-in-first-out (LIFO), stack-like access patterns. If you need another access
pattern, for example, random access or FIFO, consider using a collection more suited to this than List.

List：
不可变
为后进先出做了优化，像栈一样的访问模式
支持用::在模式匹配中取出head和tail