How to get all the keys from a Scala map
In order to get all the keys from a Scala map, we need to use either keySet method (to get all the keys as a set) or we can use keys method and if you want to get the keys as an iterator, you need to use keysIterator method. Now, lets check some examples.
Example #1:
object GfG
{
def main(args : Array[String])
{
val m 1 = Map( 3 - > "geeks" , 4 - > "for" , 2 - > "cs" )
val result = m 1 .keySet
println(result)
}
}
|
Here, keySet method is utilized.
Example #2:
object GfG
{
def main(args : Array[String])
{
val m 1 = Map( 3 - > "geeks" , 4 - > "for" , 2 - > "cs" )
val result = m 1 .keys
println(result)
}
}
|
Here, keys method is utilized.
Example #3:
object GfG
{
def main(args : Array[String])
{
val m 1 = Map( 3 - > "geeks" , 4 - > "for" , 2 - > "cs" )
val result = m 1 .keysIterator
println(result)
}
}
|
Output:
non-empty iterator
Here, keysIterator method is utilized.
Last Updated :
29 Jul, 2019
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