Determine whether a string is a palindrome

Question

Dmitry · Accepted Answer

func isPalindrome(string: String) -> Bool {
    return string == String(string.reversed())
}

func isPalindrome_Manual(string: String) -> Bool {
    guard !string.isEmpty else {
        return true
    }
    var startIndex = string.startIndex
    var endIndex = string.index(before: string.endIndex)
    for _ in 0..

Dmitry · Answer

func isPalindrome(string: String) -> Bool {
    return string == String(string.reversed())
}

func isPalindrome_Manual(string: String) -> Bool {
    guard !string.isEmpty else {
        return true
    }
    var startIndex = string.startIndex
    var endIndex = string.index(before: string.endIndex)
    for _ in 0..*string.count / 2 {
        if string[startIndex] != string[endIndex] {
            return false
        }
        startIndex = string.index(after: startIndex)
        endIndex = string.index(before: endIndex)
    }
    return true
}

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