Ruby 程序错误：NoMethodError
我为教程问题输入了一个简单的 Ruby 代码，如下所示。
#Grandma is deaf!
puts "Hey Sonny! It's your lovely Grandmother! How are you?"
response = gets.chomp
while response != "BYE"
if response != response.upcase
puts "Huh?! I CAN'T HEAR YOU!"
else
puts "NO! NOT SINCE " + (1930 + rand(21)).to_s + "!"
end
response = gets.chomp
end
puts "GOOD BYE, SONNY!"
但是，当我运行此命令时，窗口显示：
Hey Sonny! It's your lovely Grandmother! How are you?
NoMethodError: private method ‘chomp’ called for nil:NilClass
at top level in deafGrandma.rb at line 3
我不明白为什么无法识别 chomp。我在 Mac 上使用 textMate，我有 Ruby 版本 1.8.7，应该没问题。有什么解决办法吗？
太感谢了 ：）
I typed up a simple Ruby code for a tutorial question, as shown below.
#Grandma is deaf!
puts "Hey Sonny! It's your lovely Grandmother! How are you?"
response = gets.chomp
while response != "BYE"
if response != response.upcase
puts "Huh?! I CAN'T HEAR YOU!"
else
puts "NO! NOT SINCE " + (1930 + rand(21)).to_s + "!"
end
response = gets.chomp
end
puts "GOOD BYE, SONNY!"
However, when I run this, the window displays:
Hey Sonny! It's your lovely Grandmother! How are you?
NoMethodError: private method ‘chomp’ called for nil:NilClass
at top level in deafGrandma.rb at line 3
I don't understand why chomp is not recognized. I'm using textMate on a Mac I have Ruby version 1.8.7, which should be fine. Any solutions?
Thank you so much :)
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Adrian 关于 TextMate 1.5.9 (r1510) 中禁用交互式输入的说法是正确的。 请参阅 TextMate 开发人员的这篇文章。
但是，您可以升级到“尖端”TextMate 版本，该版本可以恢复交互式输入，并允许您很好地运行上述代码。转到 TextMate 的
Preferences ->软件更新并确保选中自动检查更新。在
Watch For:下拉菜单中选择Cutting-Edge。最后，点击立即检查。最新版本 (r1589) 应该会自动下载。此版本中重新启用了交互式输入。Adrian is right about interactive input being disabled in TextMate 1.5.9 (r1510). See this post from TextMate's developer.
However, you can upgrade to a "cutting-edge" TextMate release that restores interactive input, and will allow you to run the above code just fine. Go to TextMate's
Preferences -> Software Updatesand make sureAutomatically check for updatesis checked.Select
Cutting-Edgein theWatch For:dropdown menu. Finally, clickCheck Now. The latest release (r1589) should automatically download. Interactive input is re-enabled in this release.如果您在 TextMate 中使用 Cmd-R 快捷键来运行代码，您将无法为其提供输入，因为 textmate 仅支持输出。您必须在终端中运行它。您收到该错误的原因是
$stdin已关闭，因此gets返回nil。If you are using the Cmd-R shortcut in TextMate to run your code, you will not be able to supply it input because textmate only supports output. You will have to run it in a terminal instead. The reason you are getting that error is because
$stdinis closed, sogetsreturnsnil.