Ruby Fibonacci Multiplication Table [closed] - ruby

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Ruby Fibonacci Multiplication Table This was an interview question.
Recently jumped into software development, and came across this challenge. Can you show me below, how can I write the Fibonacci multiplication table in Ruby language? For the last couple of days, I was trying to implement it but seems like I am facing a brick wall and the code makes me feel insane and also I failed on the interview, but that does not matter at the moment. I will appreciate any kind of help. Thanks a lot.
ApplicationController:
class ApplicationController < Sinatra::Base
configure do
set :public_folder, 'public'
set :views, 'app/views'
end
get '/' do
#time_of_day = Time.now
erb :index
end
end
FibonacciController:
class FibonacciController < ApplicationController
get '/fibonacci' do
place = params[:place].to_i
#sequence = fib(place)
erb :fibonacci
end
def fib(place)
res = []
a = 0
b = 1
while b < place do
res << b
a,b = b,a+b
end
res
end
end
Fibonacci.erb
<div class="container">
<h1> Fibonacci sequence: </h1>
<div class="sub-container">
<p> Generated fibonacci sequence: </p>
<%= #sequence.join(', ') %>
</div>
</div>
Index.erb
<div class="container">
Date and time: <%= #time_of_day %>
<br>
<h1> Fibonacci Multiplication Table </h1>
<p> Enter your number below: </p>
<form method="GET" action="/fibonacci">
<label for="sequence">
<input type="integer" name="place" placeholder="Insert your number">
<input type="submit">
</form>
</div>
(This is the ultimate goal of this challenge)

Answer 1

FibonacciController code
class FibonacciController < ApplicationController
get '/fibonacci' do
place = params[:place].to_i
sequence = fib(place)
#table = generate_table(sequence)
erb :fibonacci
end
def fib(place)
return [] if place <= 0
a = 0
b = 1
res = [a]
while res.length < place do
res << b
a,b = b, a+b
end
res
end
def generate_table(sequence)
return [] if sequence.length.zero?
cols = []
(sequence.length + 1).times do |row|
row_data = []
(sequence.length + 1).times do |col|
row_data << generate_table_element(row, col, sequence)
end
cols << row_data
end
cols
end
def generate_table_element(row, col, sequence)
return '_' if row.zero? && col.zero?
return sequence[col - 1] if row.zero?
return sequence[row - 1] if col.zero?
sequence[col - 1] * sequence[row - 1]
end
end
And in erb file
<p> Generated fibonacci sequence: </p>
<% #table.each do |table_row| %>
<%= table_row.join(',') %>
<br/>
<% end %>