.gitignore

Untitled.txt
.ipynb_checkpoints/
gist_url

element_index.ipynb

element_index.rb

def element_index(element, my_array)
  i = 0
  length = my_array.length
  while i < length
    guess = my_array[i]
    # puts [guess == element, guess]
    return i if guess == element
    i += 1
  end
  -1
end

p element_index("b", ["a", "b", "c"])
# should output 1

p element_index("hello", ["a", "b", "c"])
# should output -1

square_roots.ipynb

square_roots.rb

(1..25).step(2).each do |n|
  puts n ** 0.5
end

(1..25).step(2).each do |n|
  puts n
end

i = 1
while i <= 25
  puts i ** 0.5
  i += 2
end

i = 1
odds = (1..25).step(2).to_a
puts odds

length = odds.length

while i < length
  puts odds[i] ** 0.5
  i += 1
end