Rails,Ruby,如何对数组进行排序? [英] Rails, Ruby, how to sort an Array?
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问题描述
在我的 rails 应用程序中,我正在创建一个数组,如下所示:
in my rails app I'm creating an array like so:
@messages.each do |message|
@list << {
:id => message.id,
:title => message.title,
:time_ago => message.replies.first.created_at
}
end
制作这个数组后,我想按 time_ago ASC 顺序对其进行排序,这可能吗?
After making this array I would like to then sort it by time_ago ASC order, is that possible?
推荐答案
@list.sort_by{|e| e[:time_ago]}
它默认为 ASC,但是如果你想要 DESC,你可以这样做:
it defaults to ASC, however if you wanted DESC you can do:
@list.sort_by{|e| -e[:time_ago]}
此外,您似乎正在尝试从 @messages
构建列表.你可以简单地做:
Also it seems like you are trying to build the list from @messages
. You can simply do:
@list = @messages.map{|m|
{:id => m.id, :title => m.title, :time_ago => m.replies.first.created_at }
}
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