可以访问 Hash each 循环中的索引吗？

我可能遗漏了一些显而易见的东西，但是有没有一种方法可以在 hash each 循环中访问迭代的索引/计数？

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)?
}

74366

小开

您可以对键进行迭代，然后手动获取值:

hash.keys.each_with_index do |key, index|
value = hash[key]
print "key: #{key}, value: #{value}, index: #{index}\n"
# use key, value and index as desired
end

编辑: 每个 Rampion 的注释，我也刚刚知道你可以得到的关键字和值作为一个元组，如果你迭代在 hash:

hash.each_with_index do |(key, value), index|
print "key: #{key}, value: #{value}, index: #{index}\n"
# use key, value and index as desired
end