CODEWITHSUNDEEP
ruby
M. Hajar
M. Hajar

Reputation: 21

Ruby filtering specific lines from a text file

I'm a newbie! I have a text file that contains lines and lines of text. I want to try to create a code that only allows the lines that have the phrase "larry.bird" show while the others are deleted. This is my current code...

File.open("HM.txt").each do |line|
   puts line
   if line.include? "larry.bird"
      puts "larye.bird " + line
   end
end

File.readlines('HM.txt') do |li|
  puts li if (li['larry.bird'])
end

If you can help me out, that would be awesome!

Upvotes: 0

Views: 623

Answers (1)

Silvio Mayolo
Silvio Mayolo

Reputation: 70277

You're pretty close. You're opening and reading the file correctly; you're just accidentally printing every line before performing the check. The puts line on the second line of your code is ensuring that this occurs.

File.open("HM.txt") do |file|
  file.each_line do |line|
    if line.include? "larry.bird"
      puts "larry.bird " + line
    end
  end
end

We can also shorten one-line if statements in Ruby, using suffix notation that often makes code more concise.

File.open("HM.txt") do |file|
  file.each_line do |line|
    puts "larry.bird " + line if line.include? "larry.bird"
  end
end

This is equivalent to the first example.

Upvotes: 1

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