如何通过数字索引获取散列值 [英] How to get a hash value by numeric index

问题描述

有一个哈希：

  h = {：a => val1，：b => val2，：c => val3} 
  

我可以参考哈希值：

  h [：a]，h [：c] 
  

但我想用数字索引来引用：

  h [0] => val1 
 h [2] => val3 
  

可能吗？ val1，：b => val2，：c => val3}
keys = h.keys

h [keys [0]]＃val1
h [keys [2]]＃val3

Have a hash:

h = {:a => "val1", :b => "val2", :c => "val3"}

I can refer to the hash value:

h[:a], h[:c]

but I would like to refer by numeric index:

h[0] => val1
h[2] => val3

Is it possible?

解决方案

h = {:a => "val1", :b => "val2", :c => "val3"}
keys = h.keys

h[keys[0]] # "val1"
h[keys[2]] # "val3"

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