本文介绍了Ruby 从字符串中删除空行的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
如何从字符串中删除空行?我试过了some_string = some_string.gsub(/^$/, "");
How do i remove empty lines from a string?I have triedsome_string = some_string.gsub(/^$/, "");
还有更多,但没有任何效果.
and much more, but nothing works.
推荐答案
删除空行:
str.gsub /^$\n/, ''
注意:与其他一些解决方案不同,这个解决方案实际上删除了空行而不是换行符 :)
Note: unlike some of the other solutions, this one actually removes blank lines and not line breaks :)
>> a = "a\n\nb\n"
=> "a\n\nb\n"
>> a.gsub /^$\n/, ''
=> "a\nb\n"
说明:匹配一行的开始^
和结束$
,中间没有任何内容,后跟一个换行符.
Explanation: matches the start ^
and end $
of a line with nothing in between, followed by a line break.
另一种更明确(虽然不太优雅)的解决方案:
Alternative, more explicit (though less elegant) solution:
str.each_line.reject{|x| x.strip == ""}.join
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