Ruby字符串插值相当于python的.format()

_str = "My name is {}"
...
_str = _str.format("Name")

在ruby中,当我尝试

_str = "My name is #{name}"

解释器抱怨变量名是未定义的,所以它是期望的

_str = "My name is #{name}" => {name =: "Name"}

如何在ruby中使用字符串占位符供以后使用？

str = "My name is %{name}"
# => "My name is %{name}"

puts str % {name: "Sam"}
# => "My name is Sam"

Ruby中的％{}和％运算符允许延迟字符串插值,直到稍后. ％{}在字符串中定义命名占位符,％将给定输入绑定到占位符.