Advant Day 1 solution.

• Problem Statement:-
  https://adventofcode.com/2020/day/1

• Solution for Part 1
• Solution for Part 2

Advant Day 2 solution.

• Problem Statement:-
  https://adventofcode.com/2020/day/2

• Solution for Part 1
• Solution for Part 2

Advant Day 4 solution by considering design.

• Problem Statement:-
  https://adventofcode.com/2020/day/4

• Solution for Part 1
• Solution for Part 2

• Protocol with default implementation ( Has - A Relationship with struct Problem1 )

• Retroactive modeling for
  

1. Collection's API :
   a. func getPassportFieldInHashTable() throws -> [PassportField: String] where Self.Element == String

2. String's API:-
   a. func getStringComponent(for givenCharacterSet: CharacterSet) -> [String]
   b. func getInteger()-> Int?
   

• Enum PassportField for type-safty better than String

enum PassportField: String, CaseIterable { case byr case iyr case eyr case hgt case hcl case ecl case pid case cid case none }

• API documentation for locally reason about code.

• Error Handling

Advant Day 5 solution

• Problem Statement:-
  https://adventofcode.com/2020/day/5

• Solution for Part 1
• Solution for Part 2

Advant Day 6 solution

• Problem Statement:-
  https://adventofcode.com/2020/day/6

• Solution for Part 1
• Solution for Part 2