Question

i’m trying to loop through a Ruby string containing many lines using the each_line method, but I also want to change them. I’m using the following code, but it doesn’t seem to work:

string.each_line{|line| line=change_line(line)}

I suppose, that Ruby is sending a copy of my line and not the line itself, but unfortunatelly there is no method each_line!. I also tried with the gsub! method, using /^.*$/ to detect each line, but it seems that it calls the change_line method only ones and replaces all lines with it. Any ideas how to do that?
Thanks in advance 🙂

Answer 1

You should try starting out with a blank string too, each_lining through the string and then pushing the results onto the blank string.

output = "" 
string.each_line{|line| output += change_line(line)}

In your original example, you are correct. Your changes are occuring but they are not being ssved anywhere. Each in Ruby does not alter anything by default.