如何从文本文件中获取匹配项并将其输出到数组中？

Question

I'm using a text file with lines of movies. If a user inputs Oz , I want to output all the movies in the file that have the word Oz in it.

This is what I have so far.

puts "Enter the keyword you want to search for: "
keyword = gets
movies_file = File.new("movies.txt", "r")
movies = movies_file.read
movies_list = movies.split(" ")
match_list = []
movies_list.each do |w|
  matchObj = w.match(keyword)
  if matchObj then
    matchlist.push(matchObj.captures[0])
  end
end
match_list.each do |title|
  puts title
end

Answer 1

Presuming you've got the file organized like this:

Wizard of Oz
Battlefield Earth
Twilight
Ozymandias

Then you can read it in this way:

lines = File.readlines('movies.txt').map(&:chomp)

Then to find matching lines:

matches = lines.grep(phrase)

There's no need for all the each stuff. Also the then on an if is almost never put in there, it's just useless decoration.