Ruby-on-rails Rails 获取“每个”循环的索引
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/4811668/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Rails get index of "each" loop
提问by criticerz
So I have this loop:
所以我有这个循环：
<% @images.each do |page| %>
<% end %>
How would I get the index of "page" inside of the loop?
我如何获得循环内“页面”的索引？
回答by PreciousBodilyFluids
<% @images.each_with_index do |page, index| %>
<% end %>
回答by Tatsuro Baba
The two answers are good. And I also suggest you a similar method:
两个答案都很好。我也建议你一个类似的方法：
<% @images.each.with_index do |page, index| %>
<% end %>
You might not see the difference between this and the accepted answer. Let me direct your eyes to these method calls: .each.with_indexsee how it's .eachand then .with_index.
您可能看不到此答案与已接受答案之间的区别。让我将您的目光引向这些方法调用：.each.with_index看看它是怎么回事.each，然后.with_index.
回答by Brett Bender
Try each_with_index.
