iterator
Returns the given iterator itself. This allows to use an instance of iterator in a
for
loop.
import java.util.*
fun main(args: Array<String>) {
//sampleStart
val mutableList = mutableListOf(1, 2, 3)
val mutableIterator = mutableList.iterator()
// iterator() extension is called here
for (e in mutableIterator) {
if (e % 2 == 0) {
// we can remove items from the iterator without getting ConcurrentModificationException
// because it's the same iterator that is iterated with for loop
mutableIterator.remove()
}
println("The element is $e")
}
//sampleEnd
}
Returns an Iterator over the entries in the Map .
import kotlin.test.*
import java.util.*
fun main(args: Array<String>) {
//sampleStart
val map = mapOf("beverage" to 2.7, "meal" to 12.4, "dessert" to 5.8)
for ((key, value) in map) {
println("$key - $value") // prints: beverage - 2.7
// prints: meal - 12.4
// prints: dessert - 5.8
}
//sampleEnd
}
@JvmName
(
"mutableIterator"
)
operator
fun
<
K
,
V
>
MutableMap
<
K
,
V
>
.
iterator
(
)
:
MutableIterator
<
MutableEntry
<
K
,
V
>
>
(source)
Returns a MutableIterator over the mutable entries in the MutableMap .