带有重复键的Ruby Hash? [英] Ruby Hash with duplicate keys?

问题描述

是否可以在 Ruby 中创建允许重复键的哈希?

Is it possible to create a hash in Ruby that allows duplicate keys?

我在使用 Ruby 1.9.2.

I'm working in Ruby 1.9.2.

推荐答案

这有点违背散列的目的，不是吗?

This would kinda defeat the purpose of a hash, wouldn't it?

如果你想让一个键指向多个元素，让它指向一个数组:

If you want a key to point to multiple elements, make it point to an array:

h = Hash.new { |h,k| h[k] = [] }
h[:foo] << :bar
h #=> {:foo=>[:bar]}
h[:foo] << :baz
h #=> {:foo=>[:bar, :baz]}

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