Groovy: remove specific characters from end of string

Question

I have a string that might end with multiple \\n (the two symbols, not a newline).

How can I remove that from the end of the string?

For example: abc\\ndef\\n\\n should become abc\\ndef

Thanks

Answer 1

对于这样一个简单的任务，一个简单的trim()就足够了：

assert 'abc\ndef' == 'abc\ndef\n\n\n\n'.trim()

Answer 2

You can do it like this:

s = "abc\ndef\n\n"
assert s.replaceAll(/\n*$/, "") == "abc\ndef"

The section between // looks for any amount of \\n and the $ represents the end of the string. So, replace any amount of newlines with nothing else after them, with an empty string.