[leetcode/kotlin] 392.Is Subsequence

class Solution {
    fun isSubsequence(s: String, t: String): Boolean {
        if (s == "") return true
        
        var pointS = 0
        var pointT = 0
        
        while (pointS < s.length && pointT < t.length) {
            if (s[pointS] == t[pointT]) {
                pointS++
            }
            pointT++
        }
        
        return pointS == s.length
    }
}