Question

我想找出第一个，第二个和第三个结果是什么，以便我可以if firstnumber==secondnumber && secondnumber==thirdnumber。我怎么能在结果上找到这些数字？

numbers = 3.times.map { Random.new.rand(0..10000) }

prizes = numbers.map do |x|
  case x
  when 1..3000
    [ '7', 10000 ]
  when 3001..6000
    [ "Cherries", 500 ]
  when 6001..10000
    [ "Diamond", 400 ]
  end
end

puts "Your results are: #{prizes.collect { |p| p[0] }.join(", ")}!

我尝试使用p [0] [0]，但它改为给出第一个字母。

Answer 1

说是否：

results = prizes.collect { |p| p[0] } #=> ["Diamond", "Cherries", "7"]

然后执行以下操作以获得每个结果：

results[0] #=> "Diamond"
results[1] #=> "Cherries"
results[2] #=> "7"

您还可以使用results.first来获取第一个元素。如果您正好在Rails中工作，您甚至可以执行以下操作：

results.second #=> "Cherries"
results.third #=> "7"

Answer 2

这是一个很好的方法：

numbers = 3.times.map { Random.new.rand(0..10000) }

prizes = numbers.map do |x|
  case x
  when 1..3000
    { name: '7', val: 10000 }
  when 3001..6000
    {name: "Cherries", val: 10000 }
  when 6001..10000
    {name: "Diamond", val: 400 }
  end
end

# You could replace 'map' with 'collect' here and have the same results
prizes_string = prizes.map { |p| "#{p[:name]}: #{p[:val]}" }.join(" and ")

puts "Your results are: #{prizes_string}!"

从Array.collect中查找具体的数字

2 个答案: