如何使用随机数填充数组？

I am trying to populate an array of four elements with positive integers that are less than 9.

我正在尝试使用小于9的正整数填充四个元素的数组。

Here is my code:

这是我的代码：

generated_number=Array.new(4)#create empty array of size 4
generated_number.each do |random| #for each position in the array create a random number
  random=rand(10)
end
puts generated_number

I don't understand what I'm missing.

我不明白我错过了什么。

4 个解决方案

#1

You can pass a range to rand()

你可以将范围传递给rand（）

Array.new(4) { rand(1...9) }

#2

I think you're over complicating things.

我认为你过度复杂化了。

 generated_numbers = 4.times.map{Random.rand(8) } #=> [4, 2, 6, 8]

edit: For giggles I put together this function:

编辑：对于咯咯笑声我把这个功能放在一起：

def rand_array(x, max)
  x.times.map{ Random.rand(max) }
end

puts rand_array(5, 20) #=> [4, 13, 9, 19, 13]

#3

This is how I solved it for an array with 10 elements:

n=10
my_array = Array.new(n)
i = 0
loop do 
 random_number = rand(n+1)
 my_array.push(random_number)

 i += 1
 break if i >= n
end

for number in my_array
  puts number

#4

This is something I did for a school final, numbers aren't exactly the same but you can change numbers and such:

这是我为学校决赛所做的事情，数字不完全相同，但你可以改变数字等等：

numbers_array = []
10.times do
    numbers_array.push(rand(1..100))
end
puts numbers_array