ruby-on-rails – 将Ruby哈希转换为数组

我有一个形式的哈希
{：a => {“aa”=> 11,“ab”=> 12},：b => {“ba”=> 21,“bb”=> 22}}

如何将其转换为{：a =>形式[[ “AA”,11],[ “AB”,12]],：B => [ “BA”,21],[ “BB”,22]]}

解决方法

如果要修改原始哈希,可以执行以下操作：

hash.each_pair { |key,value| hash[key] = value.to_a }

来自Hash#to_a的文档

Converts hsh to a nested array of [
key,value ] arrays.

h = { "c" => 300,"a" => 100,"d" => 400,"c" => 300 }

h.to_a #=> [["c",300],["a",100],["d",400]]

原文地址：https://www.jb51.cc/ruby/270915.html