讓 Compiler 做更多事 update( )i.e scala.Array {class, object} def update(i: Int, x: T): Unit Update the element at given index . Indices start a 0; xs.apply(0) is the first element of array xs. Note the indexing syntax xs(i) = x is a shorthand for xs.update(i, x). the index the value to be written at index i apply( )trait Function0[+R] extends AnyRef Function with 0 parameters . In the following example the definition of currentSeconds is a shorthand for the anonymous class definition anonfun0: object Main extends Application { val currentSeconds = () => System.currentTimeMillis() / 1000L val anonfun0 = new Function0[Long] { println(currentSeconds()) println(anonfun0()) } Value Members def apply(): R attributes: abstract val list = Array(1, 2, 3) list: Array[Int] = Array(1, 2, 3) val list = Array.apply(1, 2, 3) list: Array[Int] = Array(1, 2, 3) |
C05.入門與語法(Syntax) > 0515. Array 與 List 容器 >