Solving First Unique Character in a String in go. Please try yourself first to solve the problem and submit your implementation to LeetCode before looking into solution.

Problem Description

Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1.

Examples:

s = "leetcode"
return 0.

s = "loveleetcode",
return 2.

See the full details of the problem First Unique Character in a String at LeetCode

Originally posted at: @github.com/halfrost/LeetCode-Go