从数组中选择唯一的随机数 [英] Choose unique random number from an array

问题描述

b 是我想要的最大赢家.

b is the maximum winner that I want.

b.times do
  winner = participant[rand(participant.count)]
end

我每次都需要产生一个独特的赢家.如何在不对该代码进行太多更改的情况下实现这一目标?

I need to generate a unique winner every time. How can I achieve this without making too many changes to this code?

推荐答案

已经有一个方法.只需使用 Array#sample:

There is already a method for that. Just use Array#sample:

winners = participants.sample(b)

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