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Task/Palindrome-detection/Swift/palindrome-detection-1.swift
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19
Task/Palindrome-detection/Swift/palindrome-detection-1.swift
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import Foundation
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// Allow for easy character checking
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extension String {
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subscript (i: Int) -> String {
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return String(Array(self)[i])
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}
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}
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func isPalindrome(str:String) -> Bool {
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if (count(str) == 0 || count(str) == 1) {
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return true
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}
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let removeRange = Range<String.Index>(start: advance(str.startIndex, 1), end: advance(str.endIndex, -1))
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if (str[0] == str[count(str) - 1]) {
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return isPalindrome(str.substringWithRange(removeRange))
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}
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return false
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}
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func isPal(str: String) -> Bool {
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let c = str.characters
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return lazy(c).reverse()
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.startsWith(c[c.startIndex...advance(c.startIndex, c.count / 2)])
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}
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