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Scala immutable TreeSet foreach()用法及代码示例


在Scala中一成不变TreeSet class,则使用foreach()方法将给定函数应用于TreeSet的所有元素。

Method Definition: def foreach[U](f:(A) => U):Unit

Return Type: It returns all the elements of the TreeSet after applying the given function to each of them.

范例1:

// Scala program of foreach()  
// method  
  
// Import TreeSet 
import scala.collection.immutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating TreeSet 
        val t1 = TreeSet(2, 4, 6, 7, 8, 9)  
          
        // Print the TreeSet 
        println(t1) 
  
        // Applying foreach method to print the TreeSet 
        print("Elements in the TreeSet:")  
        t1.foreach(x => print(x + " "))   
          
    }  
} 
输出:
TreeSet(2, 4, 6, 7, 8, 9)
Elements in the TreeSet:2 4 6 7 8 9

范例2:

// Scala program of foreach()  
// method  
  
// Import TreeSet 
import scala.collection.immutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
      
        // Creating TreeSet 
        val t1 = TreeSet(2, 4, 6, 7, 8, 9)  
          
        // Print the TreeSet 
        println(t1)  
          
        // Applying foreach method   
        t1.foreach(x => println(x + " times " + x +" = " + x*x))   
          
    }  
} 
输出:
TreeSet(2, 4, 6, 7, 8, 9)
2 times 2 = 4
4 times 4 = 16
6 times 6 = 36
7 times 7 = 49
8 times 8 = 64
9 times 9 = 81



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注:本文由纯净天空筛选整理自Shivam_k大神的英文原创作品 Scala immutable TreeSet foreach() method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。