带有索引的 Ruby `each_with_object` [英] Ruby `each_with_object` with index

问题描述

我想用index来做a.each_with_object，比这更好:

I would like to do a.each_with_object with index, in a better way than this:

a = %w[a b c]
a.each.with_index.each_with_object({}) { |arr, hash|  
  v,i = arr
  puts "i is: #{i}, v is #{v}" 
}

i is: 0, v is a
i is: 1, v is b
i is: 2, v is c
=> {}

有没有办法在没有 v,i = arr 的情况下做到这一点?

Is there a way to do this without v,i = arr ?

推荐答案

代替

|arr, hash|

你可以做到

|(v, i), hash|

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