How do you loop through a multiline string in Ruby?

Question

String#each_line

str.each_line do |line|
    #do something with line
end

What Iraimbilanja said.

Or you could split the string at new lines:

str.split(/\r?\n|\r/).each { |line| … }

Beware that each_line keeps the line feed chars, while split eats them.

Note the regex I used here will take care of all three line ending formats. String#each_line separates lines by the optional argument sep_string, which defaults to $/, which itself defaults to "\n" simply.

Lastly, if you want to do more complex string parsing, check out the built-in StringScanner class.

You can also do with with any pattern:

str.scan(/\w+/) do |w|
  #do something
end