How should I practice First Unique Character (Data & Analytics)?

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Problem · String

First Unique Character (Data & Analytics)

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● EasyJPMorgan ChaseINTERNOA

Problem statement

A unique character is one that appears only once in a string. Given a string consisting of lowercase English letters only, return the index of the first occurrence of a unique character in the string using 1-based indexing. If the string does not contain any unique character, return -1.

Function

getUniqueCharacter(s: String) → int

Complete the function getUniqueCharacter in the editor below.

getUniqueCharacter has the following parameter(s):

string s: a string

Returns

int: either the 1-based index or -1

✎ᝰ.Credit to chizzy_elect ᝰ.ᐟ 🧡˚

Examples

Example 1

s = "statistics"return = 3

The unique characters are [a, c] among which a occurs first. Using 1-based indexing, it is at index 3.

Example 2

s = "hackthegame"return = 3

The unique characters are [c, k, t, g, m] out of which the character c occurs first, at index 3 :)

Constraints

1 ≤ length of s ≤ 10^5
The string s consists of lowercase English letters only.