ruby-on-rails – 将两个数组的内容相乘(不是数组本身)

发布时间：2020-12-17 03:45:12 所属栏目：百科来源：网络整理

导读：我想用卡片中的每张卡片制作一个数组,所以它会是[“Ac”,“Ad”,“Ah”,“As”,“Kc”,…]虽然顺序并不重要. 是不是有一种注入可以用来解决这个问题的方法？这是我能得到的尽可能接近. cards = ["A","K","Q","J","T","9","8","7","6","5","4","3","2"] suits

我想用卡片中的每张卡片制作一个数组,所以它会是[“Ac”,“Ad”,“Ah”,“As”,“Kc”,…]虽然顺序并不重要.

是不是有一种注入可以用来解决这个问题的方法？这是我能得到的尽可能接近.

cards = ["A","K","Q","J","T","9","8","7","6","5","4","3","2"] 
suits = ["c","s","d","h"] 
ruby-1.9.2-p180 :025 > cards.inject(suits) { |suit,card| suit.map{|s| "#{card}#{s}"}}
 => ["23456789TJQKAc","23456789TJQKAs","23456789TJQKAd","23456789TJQKAh"]

解决方法

这是你的目标吗？

cards.map { |card|
  suits.map { |suit| "#{card}#{suit}" }
}.flatten

（编辑：李大同）

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