Ruby removes trailing blanks

There are several ways to choose

• Strip () #对字符串中间的空白不做任何处理

\tHello\n world.\r\n  \n\tHello\n world.\r\n  \n world.\r\n  \tHello\n world.\r\n  \tHello\n world."

*gsub () #用正则表达式全字符串匹配

Irb (Main):020:0> "\Thello \n world \r\n ". gsub (/\s+/,')= "Helloworld."Irb (Main):021:0> "\Thello \n world \r\n ". gsub (",")= = "\thello\nworld.\r\n"Irb (Main):023:0> "\Thello \n world \r\n ". gsub ("\ n", ")= = "\thello world.\r"Irb (Main):024:0> "\Thello \n world \r\n ". gsub ("\ n", "). gsub ("\ r", ")= = "\thello world." "

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Ruby removes trailing blanks