Scala Iterator toList() method with example

Scala Iterator toSet() method with example

The toList() method belongs to the concrete value members of the AbstractIterable class and is defined in the TraversableOnce and GenTraversableOnce classes. It converts a traversable or iterator to a list but it doesn’t terminates for infinite-sized collections.

Method Definition:
```
def toList: List[A]
```
Return Type:
It returns a list from the stated traversable or an iterator.>/li>

Example :

// Scala program of toList() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Declaring an iterator 
        val iter = Iterator(8, 9, 10, 11) 
          
        // Applying toList method 
        val result = iter.toList 
              
        // Displays output 
        println(result) 
  
    } 
} 

Output:

List(8, 9, 10, 11)

Therefore, a List is generated from an iterator.
Example :

// Scala program of toList() 
// method 
  
// Creating object 
object GfG 
{  
  
    // Main method 
    def main(args:Array[String]) 
    { 
      
        // Declaring an empty-iterator 
        val iter = Iterator() 
          
        // Applying toList method 
        val result = iter.toList 
              
        // Displays output 
        println(result) 
  
    } 
} 

Output:

List()

Therefore, an empty List is generated from an empty-iterator.

Tags:

#Scala #Scala-Method #Scala

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