可以在每个循环的哈希中访问索引吗? [英] Possible to access the index in a Hash each loop?

问题描述

我可能遗漏了一些明显的东西，但是有没有办法在每个循环的哈希中访问迭代的索引/计数?

I'm probably missing something obvious, but is there a way to access the index/count of the iteration inside a hash each loop?

hash = {'three' => 'one', 'four' => 'two', 'one' => 'three'}
hash.each { |key, value| 
    # any way to know which iteration this is
    #   (without having to create a count variable)?
}

推荐答案

如果你想知道每次迭代的索引，你可以使用 .each_with_index

If you like to know Index of each iteration you could use .each_with_index

hash.each_with_index { |(key,value),index| ... }

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