[英]How to prevent any two elements from being the same in a random draw?
Here is my code: (Thank you MurifoX) 这是我的代码:(谢谢MurifoX)
<% random_bullets = Bullet.all %>
<ul>
<% 4.times do %>
<li><%= random_bullets.sample.content %></li>
<% end %>
</ul>
I would like to know if making a condition is possible to prevent any two "bullets" from having the same content on the page. 我想知道是否有条件可以防止任何两个“项目符号”在页面上具有相同的内容。 If so, could I get some help on the issue, maybe a nudge in the right direction? 如果是这样,我是否可以在这个问题上获得帮助,也许是朝着正确的方向推进?
Just remove them from the pool as they are used: 只需将它们从池中删除即可:
<% 4.times do %>
<li><%= random_bullets.delete_at(rand random_bullets.size).content %></li>
<% end %>
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