Stud_Acc_Gen_hashes.rb

input_choice = nil
student_data = Array.new
file_data = nil

# Introduce Program to user, select manual or file mode, and
# initiate the array of full_names accordingly.
puts "Welcome to Ada's Student Account Generator."
puts "Would you like to enter student names manually or by file?
Enter 'M' for manually or 'F' for file:"
input_choice = gets.chomp.upcase()
if input_choice == "F"
  puts "What is the name of your text file, extension included?
  Note: make sure your text file has no trailing empty lines."
  # Open data file with open.
  file_name = gets.chomp
  file_data = File.open(file_name)
  student_data = Array.new(File.foreach(file_name).count)
end
if input_choice == "M"
  puts "How many names will you enter?"
  student_data = Array.new(gets.chomp.to_i)
end

# Times loop to get student names (if entering manually), create
# ID numbers, generate student emails, and print full account info
(student_data.length).times do |i|
  # initialize hash for individual account
  acc_hash = Hash.new
  # finalize full_names
  if input_choice == "M"
    puts "enter student name:"
    acc_hash[:full_name] = gets.chomp.upcase()
  elsif input_choice == "F"
    acc_hash[:full_name] = file_data.readline().chomp.upcase()
  end

  # generate ID #
  acc_hash[:id] = rand(111111..999999)

  # generate email
  fnl_names = acc_hash[:full_name].split(" ")
  f_initial = fnl_names[0][0,1]
  if fnl_names.length > 2
    f_initial << fnl_names[1][0,1]
  end
  acc_hash[:email] = f_initial + fnl_names.last + acc_hash[:id].to_s[3,5] + "@adadevelopersacademy.org"

  # assign to student_data array before moving on to next student
  student_data[i] = acc_hash
end

# Print all students' generated account info
(student_data.length).times do |i|
  puts student_data[i][:full_name] + ": ID - " + student_data[i][:id].to_s + ", email - " + student_data[i][:email] + "\n"
end

Account Generator - Using Hashes

Requirement	Comments
Well formatted code	👍 Good indentation and meaningful variable names. I also like the comments breaking up each section.
Creates an array of hashes with keys for names, ID numbers and email addresses	👍
Reads in Student names	👍
Generates random ID numbers	👍
Generates proper student email addresses using the (first initial) + (last name) + (last 3 digits of the ID number)@adadevelopersacademy.org	👍
Prints out student accounts	👍
Optional Prevents duplicates	NA
Optional Handles small last 3 digits of an ID number	👍
Optional Handles first names with spaces (initials MJ for "Mary Jane")	👍 , for 3-word names
Optional Reads input from a file	👍 , nice work

Summary

Great work, you hit all the learning goals here. I hope your 1st week at Ada is going well.