## 問題 你想創建一個字符串，包含字符串，可以代表一個CoffeeScript變量。 ## 方法 使用CoffeeScript類似Ruby的字符插值法，來替代JavaScript字符串拼接。 字符串插值： ~~~ muppet = "Beeker" favorite = "My favorite muppet is #{muppet}!" # => "My favorite muppet is Beeker!" ~~~ ~~~ square = (x) -> x * x message = "The square of 7 is #{square 7}." # => "The square of 7 is 49." ~~~ ## 討論 CoffeeScript的字符串插值與Ruby的慣用法相似。絕大多數的表達式都可以放到插值語法`#{...}`中。 CoffeeScript允許在插值中使用多個表達式，這可能會有副作用，有時候是危險的信號。只有最后一個值會被返回。 ~~~ # You can do this, but don't. YOU WILL GO MAD. square = (x) -> x * x muppet = "Beeker" message = "The square of 10 is #{muppet='Animal'; square 10}. Oh, and your favorite muppet is now #{muppet}." # => "The square of 10 is 100\. Oh, and your favorite muppet is now Animal." ~~~