From: Hashmal <jeremypinat@...>
Date: 2011-05-08T08:11:08+09:00
Subject: Re: Help with while condition OR condition

`(EXIT || QUIT)` will always return "exit" as EXIT is never `nil` or 
`false`, so in your case, the input string is never checked against `QUIT`.

Try this:

     print "Input: "
     input = gets

     until ["exit", "quit"].include? input.chomp.downcase
       # Do something
       print "Input: "
       input = gets
     end

As you can see you can do it without constants. the method `include?` 
checks if an element exists in the array. `until` is basically an 
inverted `while`.



On 5/8/11 12:37 AM, Bill W. wrote:
> Hi everyone,
>
> This is my first post, so I hope I don't sound too inexperienced..
>
> I'm trying to teach myself Ruby, and have run into an issue with a while
> statement that will break if an input is "exit" or "quit".
> As of right now, it works if exit is input, but not quit
>
> I know I am completely misusing the entire thing, but here is what I
> came up with:
>
> EXIT = "exit"  #need constants since Ruby gets pissed at string literals
> QUIT = "quit"  #in a comparison
>
> print "Input: "
> input = gets
> while input.chomp.downcase != (EXIT || QUIT) #only works for exit
>
>    #Do something
>
> print "Input: "  #pick up the next input and check it
> input = gets
> end
>
> I know that Ruby has a lot of shortcuts, but if you post any please
> explain how they work (or provide a link to a good explanation.
>
> Thanks!
>