bparanj

# Write your MySQL query statement below
select id, name from Students where Students.department_id NOT IN (select id from Departments);

bparanj

def remove_vowels(s)
  vowels = ['a', 'e', 'i', 'o', 'u']
  chars = s.chars
  result = ''
  
  chars.each do |c|
    unless vowels.include?(c)
      result << c
    end
  end

bparanj

def running_sum(nums)
  sum = 0
  result = []
  
  for i in (0..nums.size-1)
    sum = sum + nums[i]
    result << sum
  end
  result
end

bparanj

class Node
  attr_accessor :data, :next_node
  
  def initialize(data, next_node=nil)
    @data = data
    @next_node = next_node
  end
  
  def to_s
    data

bparanj

class Node
  attr_accessor :data, :next_node
  
  def initialize(data, next_node=nil)
    @data = data
    @next_node = next_node
  end
  
  def to_s
    data

bparanj

class Node
  attr_accessor :data, :next_node
  
  def initialize(data, next_node=nil)
    @data = data
    @next_node = next_node
  end
end

class LinkedList

bparanj

class Node
  attr_accessor :data, :next_node
  
  def initialize(data, next_node=nil)
    @data = data
    @next_node = next_node
  end
end

class LinkedList

bparanj

class Node
  attr_accessor :data, :next_node
  
  def initialize(data, next_node=nil)
    @data = data
    @next_node = next_node
  end
end

class LinkedList

bparanj

def encodings(s)
  return 0 if s.include?('0')
  
  if s.empty?
    return 1
  elsif s.to_i < 10
    return 1
  else
    result = encodings(s[1..-1])    
    if s[0..1].to_i <= 26

bparanj

def replace_at(string, index, character)
  return string[0, index] + character + string[index + character.length .. -1]
end

def remove_white_spaces(s)
  return if (s.nil? || s.empty?)

  read = 0
  write = 0