如何将哈希转换为字符串

Question

输入：contact = {＆＃34; name＆＃34; =＆GT; ＆＃34;怀特＆＃34;，＆＃34;年龄＆＃34; =＆GT; 22，＆＃34; country＆＃34; =＆GT; ＆＃34;印度＆＃34;}

预期产出：＆＃34;年龄= 22country = Indianame = White＆＃34;

Answer 1

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

Answer 2

一种方法是使用.map

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

编辑：没有注意到输出中隐含的排序要求。

Answer 3

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


puts string
# age=22country=Indianame=White

Answer 4

npm install history --save