改进了使用 Ruby 哈希生成句子的方式

Question

我正在创建一个哈希，其中包含与姓名，年龄，家乡和最喜欢的食物相关的数据。我正在获取这些信息，然后用它做一个句子。我已经成功地让我的代码工作，但我想知道是否有一种方法可以更短地做到这一点。

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")}"

哪个将打印

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

Answer 1

如果您将Hash键符号设为符号，例如

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

您可以使用Kernel#sprintf代替，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"

或者你可以使用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化键(顺便说一下，这是Hash的首选语法)