[Kotlin syntax] Collection Functions (2)
[코틀린 문법] 컬렉션 함수 (2) associateBy, groupBy, partition fun main () { data class Gfriend(val name: String, val birthYear: Int) val gfriendMembers = listOf(Gfriend("소정", 95), Gfriend("예린",96), Gfriend("은비",97), Gfriend("은비",98), Gfriend("예원",98), Gfriend("유나",97)) // associateBy // // 아이템에서 key를 추출해 map으로 변환 println(gfriendMembers.associateBy { it.birthYear }) // {95=Gfriend(name=소정, birthYear=95), 9..