Lighthouse Labs - Intro to Web Dev - W3D1 - Oct 2016 Cohort

yellowpage_class_solution.rb

def map_letters_to_numbers(user_input)
    
    user_output = ""
    user_input.upcase!
    
    if user_input.length == 10
        user_input.each_char do |letter|
            case letter
            when("A".."C") then user_output += "2"
            when("D".."F") then user_output += "3"   
            when("G".."I") then user_output += "4"
            when("J".."L") then user_output += "5"       
            when("M".."O") then user_output += "6"
            when("P".."S") then user_output += "7"
            when("T".."V") then user_output += "8"
            when("W".."Z") then user_output += "9"       
            end
        end
        puts user_output
        
    else
        puts "You didn't enter 10 characters"
    end

end

map_letters_to_numbers("abcdefghij")