scala元組 數組

Scala中的數組 (Arrays in Scala)

An array is a linear data structure with a fixed number of elements. It is a collection that stores a fixed number Arrays in Scalf elements of the same datatype. In Scala, an array is 0 indexed, i.e. the first element has an index of zero. The last element of the array has an index of the last element minus one.

數組是具有固定數量元素的線性數據結構 。 它是一個集合，該集合在相同數據類型的Scalf元素中存儲固定數量的Array。 在Scala中， 數組的索引為0，即第一個元素的索引為零。 數組的最后一個元素的索引為最后一個元素減一。

The syntax of scala array creation is just the same as in Java but is a lot more powerful in term of features and methods backing it. It can also support sequence functions in Scala. In Scala, for defining array there is liberty on the data type. i.e. you can skip assigning of the datatype of the array. Also, it supports all types of elements.

Scala數組創建的語法與 Java中的語法相同，但是在支持它的功能和方法方面要強大得多。 它還可以在Scala中支持序列功能。 在Scala中，用于定義數組的數據類型具有自由性。 即，您可以跳過數組數據類型的分配。 此外，它支持所有類型的元素。

An array can extend up to as many dimensions as you want but only 1-D, 2-D, and 3-D arrays are commonly used. Here, we will discuss only a one-dimensional array.

數組可以擴展到任意數量的維，但是通常僅使用1-D ， 2-D和3-D數組 。 在這里，我們將只討論一維數組 。

一維數組 (ONE DIMENSIONAL ARRAY)

A one-dimensional array is one which has only one row that stores data in it. It uses contagious memory allocation for elements at index 0 to total minus one.

一維數組是只有一行存儲數據的數組 。 它使用傳染性內存分配將索引0的元素總計減為1。

Syntax:

句法：

    // its only single dimension...var arrayname = new Array[datatype](size)  

Methods to create an array in Scala

在Scala中創建數組的方法

You can optionally specify the data type of the array in Scala.

您可以選擇在Scala中指定數組的數據類型。

    // It this we have specified that the array will contain string explicitly. 
val name: String = new Array("Ram", "Akash", "Palak", "Geeta", "Sudhir");  
//In this creation method the  will itself make 
//the array of double datatype.
val percentage = new Array(46.4 , 87.4 , 76.2 , 56.9 , 89.87)   

Example:

例：

object MyClass {
def add(x:Int, y:Int) = x + y;
def main(args: Array[String]) {
var i=0
var name =  Array("Ram", "Akash", "Palak", "Geeta", "Sudhir")
var percentage =  Array (46.4 , 87.4 , 76.2 , 56.9 , 89.87)
println("Printing student names");
for(i <- 0 to name.length-1){
println("Student " + name(i) + " has scored " + percentage(i) + "%")
}
}
}

Output

輸出量

Printing student names
Student Ram has scored 46.4%
Student Akash has scored 87.4%
Student Palak has scored 76.2%
Student Geeta has scored 56.9%
Student Sudhir has scored 89.87%

翻譯自: https://www.includehelp.com/scala/arrays-in-scala.aspx

scala元組 數組