How to Solve "First Unique Character In A String" ? - LeetCode 387 Javascript

Publicado em: 20 Janeiro 2021
no canal de: Coding David

118

How to Solve "First Unique Character In A String" on LeetCode?

Problem: #387 First Unique Character in a String

Difficulty: Easy

Language: #javascript

Time Complexity: O(n)

Space Complexity: O(n)

Pseudo Code:

1. Create object "characterCount".

2. Loop through s.

a. Create condition to see if the current character in "s" is in the "characterCount". If not, add the key of current character and a value of 1.

b. Create condition if it the current character in "s" is in the "characterCount", we increment value by 1.

3. Loop through s.

a. Create condition to see if the value of that current character in the "characterCount" is equal to one. Return the i.

4. Return -1

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