Question

我是Ruby的新手。我试图使用方法打印类的类型和名称，但我得到这个语法错误，我无法弄清楚：

Code/oop.rb:47: syntax error, unexpected end-of-input
    puts <<TYPE, <<EOF, <<NAME
               ^

这是我的代码：

def whatClass()
    class_type = self.type
    class_name = self.name

    puts <<TYPE, <<EOF, <<NAME
        class_type
    TYPE
        \n
    EOF
        class_name
    NAME     
end

Answer 1

有多个错误。

序言：name和puts <<HEREDOC Heredoc HEREDOC不是标准方法。在下面的示例中，我将其替换为字符串。

当您使用Here-Documents时：

HEREDOC

然后结束<<-HEREDOC必须从第0列开始，并且可能没有尾随空格。如果您有前导空格，则必须以puts <<-HEREDOC Heredoc HEREDOC开头：

  def whatClass()
    class_type = 'type' #self.type undefined method `type'
    class_name = 'name' #self.name

    puts <<-TYPE, <<-EOF, <<-NAME
        class_type
    TYPE
        \n
    EOF
        class_name
    NAME
  end

所以你的例子是：

TYPE

再次：EOF，NAME和NAME中可能没有尾随空格（当我以剪切+粘贴为例时，class_type class_name处有尾随空格）。

下一个错误：

输出

  def whatClass()
    class_type = 'type' #self.type undefined method `type'
    class_name = 'name' #self.name

    puts <<-TYPE, <<-EOF, <<-NAME
    #{class_type}
    TYPE
        \n
    EOF
    #{class_name}
    NAME
  end

但我认为你想要两个变量的内容。所以我认为你需要：

Exception Thrown: System.IO.FileLoadException: Could not load file or assembly 'SendGrid.SmtpApi, Version=1.1.3.0, Culture=neutral, PublicKeyToken=55aa52d3c3c0d2b2' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) File name: 'SendGrid.SmtpApi, Version=1.1.3.0, Culture=neutral, PublicKeyToken=55aa52d3c3c0d2b2' at SendGrid.SendGridMessage..ctor() at seshpicker.Controllers.AccountController.<ForgotPassword>d__18.MoveNext() WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Answer 2

试试这个：

+(amountBeforeComma + "." + amountAfterComma)

Ruby打印使用这里的文档

2 个答案: