改进的方法使用Ruby哈希创建句子

Question

我正在创建一个包含与姓名，年龄，家乡和最爱食品相关的数据的哈希。 我正在获取这些信息，然后从中做出一句话。 我已经成功地使我的代码可以工作，但是我想知道他们是否是一种更短的方法。

这是我的代码：

person = {"Name" => "Randy", "Age" => 28, "Hometown" => "Jamesville", 
"Favorite Food" => "Chicken"}

puts "I am #{person.fetch("Name")}. I am #{person.fetch("Age")}-years-old. 
I'm from #{person.fetch("Hometown")} and my favorite food is #
{person.fetch("Favorite Food")}"

哪个会打印

I am Randy. I am 28-years-old. I'm from Jamesville and my favorite food is 
Chicken.

Answer 1

如果您制作Hash键符号，例如

person = {name: "Randy", 
          age: 28, 
          hometown: "Jamesville", 
          favorite_food: "Chicken"}

您可以改用Kernel#sprintf例如

sentence = "I am %{name}. I am %{age}-years-old.
       I'm from %{hometown} and my favorite food is %{favorite_food}"
sprintf sentence, person
#=>  "I am Randy. I am 28-years-old.\nI'm from Jamesville and my favorite food is Chicken"

或者您可以使用String#%

puts sentence % person
# I am Randy. I am 28-years-old.
#       I'm from Jamesville and my favorite food is Chicken
#=> nil

这两种方法都依赖于符号键（顺便说一下，这是Hash的首选语法）