如何删除字符串“\n"?从 Ruby 字符串中? [英] How can I remove the string "\n" from within a Ruby string?

问题描述

我有这个字符串:

"some text\nandsomemore"

我需要从中删除\n".我试过了

I need to remove the "\n" from it. I've tried

"some text\nandsomemore".gsub('\n','')

但它不起作用.我该怎么做?感谢阅读.

but it doesn't work. How do I do it? Thanks for reading.

推荐答案

您需要在 gsub 中使用 "\n" 而不是 '\n'.不同的引号表现不同.

You need to use "\n" not '\n' in your gsub. The different quote marks behave differently.

双引号 " 允许字符扩展和表达式插值，即它们允许您使用像 \n 这样的转义控制字符来表示它们的真实值，在这种情况下，newline，并允许使用 #{expression} 以便您可以将变量以及几乎任何您喜欢的 ruby​​ 表达式编织到文本中.

Double quotes " allow character expansion and expression interpolation ie. they let you use escaped control chars like \n to represent their true value, in this case, newline, and allow the use of #{expression} so you can weave variables and, well, pretty much any ruby expression you like into the text.

另一方面，单引号 ' 按字面意思处理字符串，因此没有扩展、替换、插值等.

While on the other hand, single quotes ' treat the string literally, so there's no expansion, replacement, interpolation or what have you.

在这种特殊情况下，最好使用 .delete 或 .tr String 方法删除换行符.

In this particular case, it's better to use either the .delete or .tr String method to delete the newlines.

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