通过合并数组创建嵌套数组（2D）[重复]答案

【问题标题】：Create nested arrays (2D) by merging arrays [duplicate]通过合并数组创建嵌套数组（2D）[重复]
【发布时间】：2013-01-19 13:52:43
【问题描述】：

可能重复：
Combination of two arrays in Ruby

Faces = "Two Three Four Five Six Seven Eight Nine Ten Jack Queen King Ace"
Suits = "Spades Clubs Hearts Diamonds"
Face = []
Face = Faces.split * 4
Suits.split

我正在寻求使用suits.split array 并将每套西装输入Face 13 次，以创建一个类似于[["Two", "Spades"],["Three", "Spades"]... ["Ace", "Diamonds"]] 的二维数组

【问题讨论】：

标签： ruby arrays nested

【解决方案1】：

正如 Sunny 所链接的问题中所发布的，您正在寻找 product：

Faces.product Suits

【讨论】：

【解决方案2】：

通常，变量应采用snake_case 的形式，常量应采用SCREAMING_SNAKE_CASE 的形式。很难说你是想创建常量还是变量。

您还可以使用%w{elements here} 以更简单的方式实例化您的数组。

浏览documentation 以了解这里发生了什么。

faces = %w{Two Three Four Five Six Seven Eight Nine Ten Jack Queen King Ace}
 => ["Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King", "Ace"] 
suites = %w{Spades Clubs Hearts Diamonds}
 => ["Spades", "Clubs", "Hearts", "Diamonds"] 
 faces.product(suites)
 => [["Two", "Spades"], ["Two", "Clubs"], ["Two", "Hearts"], ["Two", "Diamonds"], ["Three", "Spades"], ["Three", "Clubs"], ["Three", "Hearts"], ["Three", "Diamonds"], ["Four", "Spades"], ["Four", "Clubs"], ["Four", "Hearts"], ["Four", "Diamonds"], ["Five", "Spades"], ["Five", "Clubs"], ["Five", "Hearts"], ["Five", "Diamonds"], ["Six", "Spades"], ["Six", "Clubs"], ["Six", "Hearts"], ["Six", "Diamonds"], ["Seven", "Spades"], ["Seven", "Clubs"], ["Seven", "Hearts"], ["Seven", "Diamonds"], ["Eight", "Spades"], ["Eight", "Clubs"], ["Eight", "Hearts"], ["Eight", "Diamonds"], ["Nine", "Spades"], ["Nine", "Clubs"], ["Nine", "Hearts"], ["Nine", "Diamonds"], ["Ten", "Spades"], ["Ten", "Clubs"], ["Ten", "Hearts"], ["Ten", "Diamonds"], ["Jack", "Spades"], ["Jack", "Clubs"], ["Jack", "Hearts"], ["Jack", "Diamonds"], ["Queen", "Spades"], ["Queen", "Clubs"], ["Queen", "Hearts"], ["Queen", "Diamonds"], ["King", "Spades"], ["King", "Clubs"], ["King", "Hearts"], ["King", "Diamonds"], ["Ace", "Spades"], ["Ace", "Clubs"], ["Ace", "Hearts"], ["Ace", "Diamonds"]]

请记住，产品仅适用于 Ruby 1.9 >=。

【讨论】：