each.rb

require 'pry'
students = File.readlines('students')

# students.each do |student|
#   puts "#{student.chomp} is a member of The Flatiron School"
# end
#
students.each do |student|
  if student.start_with?('S')
    puts student.strip
  end
end
#
# students.each {|student| puts student.chomp }


def students_counter(students_array, count)
  students_array.first(count).each do |student|
    puts "You asked for #{count} students"
    puts "#{student.chomp} is a member of The Flatiron School"
  end
end
#
students_counter(students, 5)

enumerables.rb

students = [
  "Cassidy Robertson",
  "Ian Valentine",
  "Dana Najjar",
  "Lucy Orbach",
  "Findlay Parke",
  "Jahde Eve",
  "Ben Gadbaw",
  "Franco Mendoza",
  "Kenny Miyasato",
  "Parker Lawrence",
  "Jonathan Meyers",
  "Waruna Perera",
  "Abeille Abejorro",
  "Summer Min",
  "Chad Ruble",
  "Adam Czerepinski",
  "Evan Schrager",
  "Seph Kramer",
  "Timothy Murray",
  "Simone Hill",
  "Josh Baker",
  "Julian Taub",
  "Evan Rosse",
  "Jonathan Tow",
  "Dace Willmott",
  "Hannah Westheimer",
  "Stefania Sicurelli"
]
students.each.with_object([]) do |student, collection|
  if student.start_with?('D')
    collection << "#{student}"
  end
end
# => ["Dana Najjar", "Dace Willmott"]

loop.rb

require 'pry'
students = File.readlines('students')
i = 0
loop do
  puts "#{students[i].chomp} is a member of The Flatiron School"
  i += 1
  break if i == students.length
end

my_each.rb

students = File.readlines('students')

def my_each(array)
  i = 0
  while i < array.size
    if array[i].start_with?('J')
      yield(array[i])
    end
    i += 1
  end
  array
end

# my_each(students) do |element|
#   puts "I got yielded element #{element.chomp}"
# end

my_each(students) do |element|
  puts "I got yielded element #{element.chomp}"
end
#
# def gimme_double(num)
#   puts "you gave me #{num}"
#   doubled = num * 2
#   if block_given?
#     result = yield(doubled)
#     puts "The block returned #{result}"
#   end
# end
#
# gimme_double(7) do  |number|
#   number
# end


# def square_numbers(numbers)

#   i = 0
#   while i < numbers.count
#     puts numbers[i] * numbers[i]
#     i += 1
#   end
# end
#
# def double_numbers(numbers)
#   i = 0
#   while i < numbers.count
#     puts numbers[i] * 2
#     i += 1
#   end
# end
#
# [1,2,3].each do |num|
#   puts num * num
# end
#
# [1,2,3].each do |num|
#   puts num - num
# end

scope.rb

require 'pry'
students = File.readlines('students')

students.each do |student|
  changed = true
end

if changed
  puts "I was changed in the block"
end

students

Cassidy Robertson
Ian Valentine
Dana Najjar
Lucy Orbach
Findlay Parke
Jahde Eve
Ben Gadbaw
Franco Mendoza
Kenny Miyasato
Parker Lawrence
Jonathan Meyers
Waruna Perera
Abeille Abejorro
Summer Min
Chad Ruble
Adam Czerepinski
Evan Schrager
Seph Kramer
Timothy Murray
Simone Hill
Josh Baker
Julian Taub
Evan Rosse
Jonathan Tow
Dace Willmott
Hannah Westheimer
Stefania Sicurelli

while.rb

require 'pry'
students = File.readlines('students')
# i = 0
# while i < students.length
#   puts "#{students[i].chomp} is a member of The Flatiron School"
#   i += 1
# end


def students_counter(students_array, count)
  # i = 0
  # while i < count
  while count.nonzero?
    puts "#{students_array[count - 1].chomp} is a member of The Flatiron School"
    count -= 1
  end
end

students_counter(students, 5)