输出字符串时引用变量(双引号字符串表达式内插)

代码:

 name1="doublefive" name2=" is a good guy!" puts "hello,#{name}." puts "He has his faults, but all in all, #{name1+name2}"  

结果: hello,doublefive.

        He has his faults, but all in all, doublefive is a good guy!

 

评论: 起初认为大括号大材小用了(C语言的思维),当看到定义 #{任意复杂的表达式} 后就不那么想了.