Can a ruby ​​trigger be used as a filter to make kludgy smaller?

Question

To get some of the text, I use kludge true ifbefore the trigger:

desired_portion_lines = text.each_line.find_all do |line|
  true if line =~ /start_regex/ .. line =~ /finish_regex/
end
desired_portion = desired_portion_lines.join

If I remove the bit true if, he complains

Bad value for range (ArgumentError)

Is it possible to make it less shabby, or just I have to do

desired_portion_lines = ""
text.each_line do |line|
  desired_portion_lines << line if line =~ /start_regex/ .. line =~ /finish_regex/
end

Or is there a better approach that does not use enumeration?

Answer 1

if you do it line by line, my preference is something like this

line =~ /finish_regex/ && p=0
line =~ /start_regex/ && p=1
puts line if p

if you have everything on one line. I would use split

mystring.split(/finish_regex/).each do |item|
  if item[/start_regex/] 
     puts item.split(/start_regex/)[-1]
  end
end

Answer 2

I think,

desired_portion_lines = ""
text.each_line do |line|
  desired_portion_lines << line if line =~ /start_regex/ .. line =~ /finish_regex/
end

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, -, :

desired_portion_lines = ""
text.each_line do |line|
  desired_portion_lines << line if ( (line =~ /start_regex/) .. (line =~ /finish_regex/) )
end

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. , , :

desired_portion = text.each_line.find_all { |line| line =~ /start_regex/ .. line =~ /finish_regex/ }.join

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Answer 3

You can save three characters by replacing true ifwith !!()(with a flip flop between parentheses).