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Kotlin 125-Valid-Palindrome #565

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Kotlin 125-Valid-Palindrome
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@edo-ce
edo-ce authored Jul 21, 2022
commit 6c5f03eebb3fd7684741345baebbd0ea3216e08a
15 changes: 15 additions & 0 deletions kotlin/125-Valid-Palindrome.kt
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Original file line number Diff line number Diff line change
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class Solution {
fun isPalindrome(s: String): Boolean {
val s = s.toLowerCase()
var i = 0
var j = s.length - 1
while (i < j) {
while (!s[i].isLetterOrDigit() && i < j)
i++;
while (!s[j].isLetterOrDigit() && j > i)
j--;
if (s[i++] != s[j--]) return false
}
return true
}
}