Function expandAroundCenter

longest_palindromic_substring_5/solution.go:99–115

(s string, left int, right int)

}

func expandAroundCenter(s string, left int, right int) int {
	// The left and right values are either:
	//   - equal
	//   - right = left + 1

	// while left is greater than -1 and
	// right is less than the length of s and
	// s[left] is equal to s[right].
	for left > -1 && right < len(s) && s[left] == s[right] {
		left--
		right++
	}

	// return the length of the palindromic expansion (i.e., units from
	// center being the passed left and right) about the center.
	return right - left - 1
}