Part of Quick ramp up Data Structure series to understand standard operations implemented using Swift. Do check out Part-1, Part-2, Part-3, Part-4, Part-5, Part-6, Part-7 before proceeding further. 45. Letter Combinations of a Phone Number : https://leetcode.com/problems/letter-combinations-of-a-phone-number/ 46. Check If Two String Arrays are Equivalent : https://leetcode.com/problems/check-if-two-string-arrays-are-equivalent/