carolineartz

# PSEUDOCODE
# INPUT: an array of numbers
# OUPUT: sum of all numbers in array
# STEPS: start with a total of zero 
# iterate over each element in the array
# for each element, add its value to the total
# return the total after there are no more elements


# INITIAL CODE:

carolineartz

# PSEUDOCODE 
# INPUT: array of grades 
# OUPUT: a string representation of the letter grade that corresponds with
# the average score of the array of grades  
# STEPS: Compute the average value of the values in teh input array
# divide the average by the length of input array => computes average score
# define letter grade distribution
# convert the average score to its corresponding letter grade
# return letter grade, as string 

carolineartz

# CALCULATE THE MEDIAN OF AN ARRAY OF NUMBERS
# PSEUDOCODE 
# INPUT: array of numbers 
# OUPUT: the median number of the elements of the input array
# STEPS: sort the array 
# determine if the array has one or two middle values by checking
# if the length is even or odd
# if there is an odd length, return the value of the middle element
# otherwise return the average of the two middle elements' values

carolineartz

# CALCULATE THE MEDIAN OF AN ARRAY OF NUMBERS
# PSEUDOCODE
# INPUT: array object takes a non-negative integer minimum array size, 
# optional value to pad which defaults to nil
# OUPUT: array object (#pad! returnning the same object while #pad 
# will return a copy) which is padded conditional on its existing 
# attributes and the passed parameters

# STEPS: for #pad! [#pad will do the same, but make a copy prior to executing
# anything with the potential to modify it] if the array is smaller than the

carolineartz

# PSEUDOCODE
# INPUT: array object takes a non-negative integer minimum array size, 
# optional value to pad which defaults to nil
# OUPUT: array object (#pad! returnning the same object while #pad 
# will return a copy) which is padded conditional on its existing 
# attributes and the passed parameters

# STEPS: for #pad! [#pad will do the same, but make a copy prior to executing
# anything with the potential to modify it] if the array is smaller than the

carolineartz

def mode(array)
  array_of_modes = []
#NOTE:
#Hash.new(0) differs from defining an empty hash by {} in that:
#      1. Hash.new(0) defines an empty hash with a default value of 0 for new keys with undefined values.
#      2. {} defines an empty hash that will default to nil for new keys with undefined values.
#Here, executing the block on nil will result in NoMethodError as + is undefined for nil, so must  Hash.new(0)

##############CREATE OUR FREQUENCIES HASH#########

carolineartz

#######################################PSEUDOCODE###################################

# INPUT: a string
# OUPUT & PSEUDOCODE
# Contains SSN =>     OUTPUT: Return boolean true/false
#                     Test string for chars in SSN format
# Return SSN =>       OUTPUT: Return SSN extracted from input, as string
#                     Call Contains SSN method-test if a SSN in string
#                     If contains SSN, extract and return.

carolineartz

#######################################PSEUDOCODE###################################

# INPUT: a positive integer number formatted without commas
# OUPUT: the input number formatted with commas as a string
# [refactored solution]
# Convert the input number to string
# Reverse the string
# put a comma after each complete group of 3 characters
# reverse and return the string

carolineartz

#######################################PSEUDOCODE###################################

# INPUT: a positive integer
# OUPUT: boolean true/false if it is a fibonacci number
# generate fib numbers less than or equal to input
# test whether input one of the generated fib numbers
# return boolean true if is fib number
# return boolean false if not a fib number

carolineartz

########################IDENTIFY WHAT EACH LINE OF CODE IS DOING####################

def north_korean_cipher(coded_message)
  input = coded_message.downcase.split("") #any uppercase chars to lowercase;
                    #splits the string at each char and
                    #returns an array of chars.
  decoded_sentence = [] #creates empty array to push our deciphered message chars into
  cipher = {"e" => "a", #deciphers the alphabetical chars into NK key => EN value
            "f" => "b",
            "g" => "c",