如何哈希转换为字符串

Question

输入：触点= { “名”=> “白”， “年龄”=> 22， “国家”=> “印度”}

预期输出：“年龄= 22country = Indianame =白色”

Answer 1

一种方式是通过使用.map

contact = {"name" => "White", "age" => 22, "country" => "India"} 
contact.sort.map{|pair| pair.join('=')}.join 
=> "age=22country=Indianame=White" 

编辑：没有注意到输出暗示的排序要求。

Answer 2

string = "" 
input.each do |key, value| 
    string += "#{key}=#{value}" 
end 


puts string 
# age=22country=Indianame=White 

Answer 3

{"name" => "White", "age" => 22, "country" => "India"}.sort.map{|i| i.join('=')}.join 

Answer 4

contact.keys.sort.map {|k| "#{k}=#{contact[k]}"}.join