Unique String

This is an essential algorithm to finding unique characters within a string.

• Bools are used when you want to check if you want to check if an element has been hit once.
• Benefits: Boolean variables are always smaller as they only require 1 byte
• Negatives: You are restricted to a binary value

bool charArray[128]; // # of possible Unicode values

• A more flexible option would be using integers.
• Benefits: Useful for counting
• Negatives: Ints require 8 bytes. They requires 8x the space as bools.