kotlin-stdlib/kotlin.collections/mutableSetOf

mutableSetOf

inline fun <T> mutableSetOf(): MutableSet<T>(source)

Returns an empty new MutableSet.

The returned set preserves the element iteration order.

Since Kotlin

1.1

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val set = mutableSetOf<Int>()
println("set.isEmpty() is ${set.isEmpty()}") // true

set.add(1)
set.add(2)
set.add(1)

println(set) // [1, 2] 
   //sampleEnd
}
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val set = mutableSetOf<Int>()
println("set.isEmpty() is ${set.isEmpty()}") // true
set.add(1)
set.add(2)
set.add(1)
println(set) // [1, 2] 
Open in Playground →
Target: JVMRunning on v.2.1.20

fun <T> mutableSetOf(vararg elements: T): MutableSet<T>(source)

Returns a new MutableSet with the given elements. Elements of the set are iterated in the order they were specified.

Since Kotlin

1.0

Samples

import kotlin.test.*

fun main() { 
   //sampleStart 
   val set = mutableSetOf(1, 2, 3)
println(set) // [1, 2, 3]

set.remove(3)
set += listOf(4, 5)
println(set) // [1, 2, 4, 5] 
   //sampleEnd
}
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val set = mutableSetOf(1, 2, 3)
println(set) // [1, 2, 3]
set.remove(3)
set += listOf(4, 5)
println(set) // [1, 2, 4, 5] 
Open in Playground →
Target: JVMRunning on v.2.1.20

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