convert array to hash
Get all letters in array of words
Swap keys and values in hash
Convert array of words to letters refactor
add together integer keys and values
Convert array of words to letters refactor
Remove capital letters from string
Round up number to integer
Refactor round up number
Round down number to integer
Format date nicely
Extract domain name from email
Titleize a string
check string for special character
get upper limit of range
Refactor end of range
Is a 3 dot range
Square root of number
Word count a file