将两个数组组合成哈希 [英] Combine two Arrays into Hash

问题描述

我有两个数组:

members     = ["Matt Anderson", "Justin Biltonen", "Jordan Luff", "Jeremy London"]
instruments = ["guitar, vocals", "guitar", "bass", "drums"]

我想做的是将这些组合起来，这样得到的数据结构就是一个像这样的哈希:

What I would like to do is combine these so that the resulting data structure is a Hash like so:

{"Matt Anderson"=>["guitar", "vocals"], "Justin Biltonen"=>"guitar", "Jordan Luff"=>"bass", "Jeremy London"=>"drums"}

请注意，Matt Anderson"的值现在是一个数组而不是字符串.任何 Ruby 向导都愿意试一试吗?

Note the value for "Matt Anderson" is now an Array instead of a string. Any Ruby wizards care to give this a shot?

我知道Hash[*members.zip(instruments).flatten]几乎以我想要的方式组合它们，但是如何转动吉他，人声"字符串先放入一个数组?谢谢.

I know Hash[*members.zip(instruments).flatten] combines them almost the way I want, but what about turning the "guitars, vocals" string into an array first? Thanks.

推荐答案

使用 map 和 split 将乐器字符串转换为数组:

Use map and split to convert the instrument strings into arrays:

instruments.map {|i| i.include?(',') ? (i.split /, /) : i}

然后使用Hash[]和zip将members与instruments结合起来:

Then use Hash[] and zip to combine members with instruments:

Hash[members.zip(instruments.map {|i| i.include?(',') ? (i.split /, /) : i})]

得到

{"Jeremy London"=>"drums",
 "Matt Anderson"=>["guitar", "vocals"],
 "Jordan Luff"=>"bass",
 "Justin Biltonen"=>"guitar"}

如果你不关心单项列表是否也是数组，你可以使用这个更简单的解决方案:

If you don't care if the single-item lists are also arrays, you can use this simpler solution:

Hash[members.zip(instruments.map {|i| i.split /, /})]

它给了你这个:

{"Jeremy London"=>["drums"],
 "Matt Anderson"=>["guitar", "vocals"],
 "Jordan Luff"=>["bass"],
 "Justin Biltonen"=>["guitar"]}

这篇关于将两个数组组合成哈希的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！