Ragnarson 2016 - Day 1

first_steps.rb

tab = []
10.times { tab << rand(36) + 1 }

#max
max = tab[0]

tab.each do |x|
  max = x if x > max
end

puts "tab: #{tab}"
puts "max: #{max}"

#min
min = tab[0]

tab.each do |x|
  min = x if x < min
end

puts "tab: #{tab}"
puts "min: #{min}"

#random
random = tab[rand(tab.size - 1)]
puts "tab: #{tab}"
puts "random: #{random}"

#sum and average
sum = tab[0]

tab.each do |x|
  sum += x
end

avg = sum / tab.size
puts "tab: #{tab}"
puts "sum: #{sum}"
puts "avg: #{avg}"

#factorial
a = rand(10) + 1
puts "a: #{a}"
fact = a - 1

while fact > 1 do
  a *= fact
  fact -= 1
end

puts "factorial: #{a}"

#bubble sort
puts "table: #{tab}"

n = tab.size

swapped = true

while swapped do
  swapped = false
  for i in 0..(n - 2)
    if tab[i] > tab[i + 1]
      tab[i], tab[i + 1] = tab[i + 1], tab[i]
      swapped = true
    end
  end
end

puts "sorted: #{tab}"

#primes
tab2 = (2..100).to_a

tab2.each do |x|
  tab2.select! { |i| i % x != 0 }
end

puts "primes: #{tab2}"