Make array of objects from array of strings

Question

I have an array of strings read from file.

contents = File.readlines('foo.txt')

I can create an some object with string

my_foo = Foo.new("some_text")

I need to make an array of objects Foo made by array of strings contents. How can I do it?

Answer 1

It may be worth to mention, that File.readlines will read everything into memory, what may cause memory issues with large files. Consider using this code:

File.foreach('foo.txt').map do |line|
  Foo.new(line)
end

It read file line by line, almost as fast as your code, but more secure.