EdDeAlmeidaJr

def ints_only?(arr)
  res = true
  arr.map { |item| res = res && item.is_a?(Integer) ? true : false }
  res
end

def array_flatten(arr)
  while !ints_only?(arr) do
    new_arr = Array.new
    arr.map{ |item|

EdDeAlmeidaJr

def most_common_letter(string)
  h = Hash.new    
  characters = string.chars.each do |c|
    if (h[c].nil?) then
      h[c] = 1
    else
      h[c] = h[c]+1
    end
  end
  maxk = nil

EdDeAlmeidaJr

def most_common_letter(string)
  h = Hash.new
  string.chars.sort.each do |c|
    h[c] = 0 if (h[c].nil?)
    h[c] = h[c] + 1
  end
  maxk = nil
  maxv = -1
  mk = h.keys
  mk.each do |k|

EdDeAlmeidaJr

def most_common_letter(string)
  counts = Hash.new(0)
  string.each_char {|c| counts[c] += 1 }
  counts.max_by{|k,v| v}
end

EdDeAlmeidaJr

def alfa
  alfa_variable = 1

  def beta
    beta_variable = 2
    puts 'Method beta'
  end

  puts 'Method alfa'
  puts alfa_variable

EdDeAlmeidaJr

def alfa

  def beta
    puts 'Method beta'
  end

  puts 'Method alfa'
  beta

end

EdDeAlmeidaJr

class CustomersController < ApplicationController

  def index
    a = Customer.find(1)
    b = Customer.where.not(id: 1).order(:name)
    @customers = a + b
  end

end

EdDeAlmeidaJr

class CustomersController < Applicationcontroller
  
  def index
    a = Customer.where(id: 1)
    b = Customer.where.not(id: 1).order(:name)
    @customers = a + b
  end
  
end

EdDeAlmeidaJr

class CustomersController < ApplicationController
  
  def index
    @customers = Array.new
    @customers.push(Customer.find(1))
    Customer.where.not(id: 1).order(:name).each{ |rec| @customers.push(rec) }
  end
  
end

EdDeAlmeidaJr

def prime?(n)
    res = true
    (2..n-1).each{ |d| res = res && (not ((n%d)==0)) }
    return res
end