newline

问题 How can I determine new line separator used by OS (LF, CR/LF or other), in Ruby? 回答1: Not sure if there is a direct solution to get the type of newline based on OS, but there is the $/ variable that holds the "input record separator". By default this will be "\n". (Documentation here) You can detect the OS and then set $/ to the "correct" value. To detect OS: puts RUBY_PLATFORM # => 'i386-linux' require 'rbconfig' puts Config::CONFIG['target_cpu'] # => 'i386' puts Config::CONFIG['target_os']

问题 In bash, this works: echo -n $'a\nb\nc\n' | while read x; do echo = $x =; done The while loops through three times = a = = b = = c = But imagine a text file that doesn't have the conventional trailing newline. I think that read should still work for all three lines, but it doesn't. I just get: echo -n $'a\nb\nc' | while read x; do echo = $x =; done = a = = b = The help read in bash doesn't really clarify. Note: I don't need this resolved, and I can see some ways to fix it myself. I am curious

问题 In bash, this works: echo -n $'a\nb\nc\n' | while read x; do echo = $x =; done The while loops through three times = a = = b = = c = But imagine a text file that doesn't have the conventional trailing newline. I think that read should still work for all three lines, but it doesn't. I just get: echo -n $'a\nb\nc' | while read x; do echo = $x =; done = a = = b = The help read in bash doesn't really clarify. Note: I don't need this resolved, and I can see some ways to fix it myself. I am curious

问题 What would be the most pythonic way of removing single newlines but keeping multiple newlines from a string? As in "foo\n\nbar\none\n\rtwo\rthree\n\n\nhello" turning into "foo\n\nbar one two three\n\n\nhello" I was thinking about using splitlines(), then replacing empty lines by "\n" and then concatenating everything back again, but I suspect there is a better/simpler way. Maybe using regexes? 回答1: >>> re.sub('(?<![\r\n])(\r?\n|\n?\r)(?![\r\n])', ' ', s) 'foo\n\nbar one two three\n\n\nhello'

问题 What would be the most pythonic way of removing single newlines but keeping multiple newlines from a string? As in "foo\n\nbar\none\n\rtwo\rthree\n\n\nhello" turning into "foo\n\nbar one two three\n\n\nhello" I was thinking about using splitlines(), then replacing empty lines by "\n" and then concatenating everything back again, but I suspect there is a better/simpler way. Maybe using regexes? 回答1: >>> re.sub('(?<![\r\n])(\r?\n|\n?\r)(?![\r\n])', ' ', s) 'foo\n\nbar one two three\n\n\nhello'

问题 What would be the most pythonic way of removing single newlines but keeping multiple newlines from a string? As in "foo\n\nbar\none\n\rtwo\rthree\n\n\nhello" turning into "foo\n\nbar one two three\n\n\nhello" I was thinking about using splitlines(), then replacing empty lines by "\n" and then concatenating everything back again, but I suspect there is a better/simpler way. Maybe using regexes? 回答1: >>> re.sub('(?<![\r\n])(\r?\n|\n?\r)(?![\r\n])', ' ', s) 'foo\n\nbar one two three\n\n\nhello'

问题 What would be the most pythonic way of removing single newlines but keeping multiple newlines from a string? As in "foo\n\nbar\none\n\rtwo\rthree\n\n\nhello" turning into "foo\n\nbar one two three\n\n\nhello" I was thinking about using splitlines(), then replacing empty lines by "\n" and then concatenating everything back again, but I suspect there is a better/simpler way. Maybe using regexes? 回答1: >>> re.sub('(?<![\r\n])(\r?\n|\n?\r)(?![\r\n])', ' ', s) 'foo\n\nbar one two three\n\n\nhello'

问题 Original title: Keep newline character in string during gsub There is a post, where I try to convert JSON to markdown unordered lists. It is almost done, but there is a pattern which I can not handle. If a string has a space, newline, space sequence in it, then it will be treated as the list item hyphen. If I try to avoid this using some reference to a newline character, then nothing works as I expect. Input JSON: https://gist.github.com/hermanp/381eaf9f2bf5f2b9cdf22f5295e73eb5 Preferred

问题 I want to know if it is possible to get back to the last line when I'm at the beginning of the next line? (in C# Console, of course) I mean Console.WriteLine() cause going to the next line and I want to stay in my line even after pressing enter. (And I think there isn't another way to ReadLine without going to the next line , is there?) I found that Console.SetCursorPosition() can be useful, like below: int x, y; Console.WriteLine("Please enter the point's coordinates in this form (x,y):");

问题 I want to know if it is possible to get back to the last line when I'm at the beginning of the next line? (in C# Console, of course) I mean Console.WriteLine() cause going to the next line and I want to stay in my line even after pressing enter. (And I think there isn't another way to ReadLine without going to the next line , is there?) I found that Console.SetCursorPosition() can be useful, like below: int x, y; Console.WriteLine("Please enter the point's coordinates in this form (x,y):");