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My solutions to Swift Coding Challenges by Hacking With Swift

📘 Challenges Checklist

Strings

• Challenge 1: Are the letters unique?
• Challenge 2: Is a string a palindrome?
• Challenge 3: Do two strings contain the same characters?
• Challenge 4: Does one string contain another?
• Challenge 5: Count the characters
• Challenge 6: Remove duplicate letters from a string
• Challenge 7: Condense whitespace
• Challenge 8: String is rotated
• Challenge 9: Find pangrams
• Challenge 10: Vowels and consonants
• Challenge 11: Three different letters
• Challenge 12: Find longest prefix
• Challenge 13: Run-length encoding
• Challenge 14: String permutations
• Challenge 15: Reverse the words in a string

Numbers

• Challenge 16: Fizz Buzz
• Challenge 17: Generate a random number in a range
• Challenge 18: Recreate the pow() function
• Challenge 19: Swap two numbers
• Challenge 20: Number is prime
• Challenge 21: Counting binary ones
• Challenge 22: Binary reverse
• Challenge 23: Integer disguised as string
• Challenge 24: Add numbers inside a string
• Challenge 25: Calculate a square root by hand
• Challenge 26: Subtract without subtract

Files

• Challenge 27: Print last lines
• Challenge 28: Log a message
• Challenge 29: Documents directory
• Challenge 30: New JPEGs
• Challenge 31: Copy recursively
• Challenge 32: Word frequency
• Challenge 33: Find duplicate filenames
• Challenge 34: Find executables
• Challenge 35: Convert images
• Challenge 36: Print error lines

Collections

• Challenge 37: Count the numbers
• Challenge 38: Find N smallest
• Challenge 39: Sort a string array by length
• Challenge 40: Missing numbers in array
• Challenge 41: Find the median
• Challenge 42: Recreate index(of:)
• Challenge 43: Linked lists
• Challenge 44: Linked list mid-point
• Challenge 45: Traversing the tree
• Challenge 46: Recreate map()
• Challenge 47: Recreate min()
• Challenge 48: Implement a deque data structure
• Challenge 49: Sum the even repeats
• Challenge 50: Count the largest range
• Challenge 51: Reversing linked lists
• Challenge 52: Sum an array of numbers
• Challenge 53: Linked lists with a loop
• Challenge 54: Binary search trees

Algorithms

• Challenge 55: Bubble sort
• Challenge 56: Insertion sort
• Challenge 57: Isomorphic values
• Challenge 58: Balanced brackets
• Challenge 59: Quicksort
• Challenge 60: Tic-Tac-Toe winner
• Challenge 61: Find prime numbers
• Challenge 62: Points to angles
• Challenge 63: Flood fill
• Challenge 64: N Queens