Ruby read file_name with gets-CodePudding

I have a beginners coding task, first step is my program "should prompt the user to enter a filename of a file that contains the following information:" There's already pre-made code to work on, a "music_player.rb" (where I have to write the code) and "albums.text" (which is the file I want to read from)

I know a_file = File.new("mydata.txt", "r") is to read from file. I'm trying to do:

file_name = gets()
a_file = File.new("#{file_name}" , "r") # (line 13)

I keep getting error

music_player_with_menu.rb:13:in `initialize': No such file or directory @ rb_sysopen - albums.txt (Errno::ENOENT)

when I enter albums.txt. If I just remove gets and have File.new("albums.txt" , "r") it works. I'm not sure what I'm doing wrong.

CodePudding user response：

Trying to read from mydata.txt\n is going to raise an exception unless the filename actually ends in \n, which is rarely the case. This is because you're using #gets, which includes the newline character(s) from the user pressing RETURN or ENTER.

When you read from STDIN, you will get a line-ending (e.g. \n on *nix, and \r\n on Windows). So, when you call #gets, you almost always need to call String#chomp on the result.

file_name = gets
#=> "foo\n"

file_name = gets.chomp
#=> "foo"