릿코드 242. Valid Anagram 코틀린

스트링2개 각각 해시맵에 넣고 두개 비교해서 같으면 true 다르면 false 리턴

정답

class Solution {
    fun isAnagram(s: String, t: String): Boolean {
        val sHashMap = hashMapOf<Char, Int>()
        val tHashMap = hashMapOf<Char, Int>()
        for (i in s){
            sHashMap[i]=sHashMap[i]?.plus(1)?:1
        }
        for (i in t){
            tHashMap[i]=tHashMap[i]?.plus(1)?:1
        }

        return sHashMap==tHashMap
    }
}