如何在文本文件中搜索字符串，然后打印/返回/输出在Ruby中作为数字找到的文件的哪一行

Question

So, I want to use the number I get from it in this:

line = answer to question 
database.read.lines[line]

Database being the text file I am searching in.

Answer 1

You can also do it this way :

text_to_find = 'some random text' # use gets method to take input from user
text_found_at_index = database.readlines.index{|line| not line[text].nil? }

Hope, this is what you require : )

Answer 2

I would try something like this:

query = gets.chomp
database.each_line.with_index do |line, index|
  if line.include?(query)
    puts "Line #{index}: #{line}" 
  end
end