Trim blank newlines from string in Ruby

问题

I have a string of four blank lines which all up makes eight lines in total in the following:

str = "aaa\n\n\nbbb\n\nccc\ddd\n" 

I want to return this all in one line. The output should be like this on a single line:

aaabbbcccddd

I used various trim functions to get the output but still I am failing.

What method do I have to use here?

回答1:

The Ruby (and slightly less Perl-ish) way:

new_str = str.delete "\n"

...or if you want to do it in-place:

str.delete! "\n"

回答2:

str.gsub(/\n/,'')

回答3:

> str = "aaa\n\n\nbbb\n\nccc\ddd\n" 
=> "aaa\n\n\nbbb\n\ncccddd\n"
> str.gsub("\n", "")
=> "aaabbbcccddd"

来源：https://stackoverflow.com/questions/1040390/trim-blank-newlines-from-string-in-ruby