ruby on rails中怎样去掉字符串结尾处的回车？

Question

ruby on rails中怎样去掉字符串结尾处的回车

Answer 1

ruby的String类有一个方法叫chomp，用来去掉字符串末尾的\n或\r
例子这样
"hello".chomp #=> "hello"
"hello\n".chomp #=> "hello"
"hello\r\n".chomp #=> "hello"
"hello\n\r".chomp #=> "hello\n"
"hello\r".chomp #=> "hello"