From: Brian Candler <lists@...>
Date: 2012-08-25T16:36:32+09:00
Subject: Re: Access returned value in a string?

Stefan Codrescu wrote in post #1072788:
> Additionally you could do something like
> questions = [ "a slide is placed #{a=rand(3..15), a} cm to the left of a
> lens."
> a could then be passed to some function.

If you have not been using Ruby for a long time, you should probably 
test your answers before posting.

Ruby is not C, and there is not a "comma operator" like C. What you have 
written will assign a two-element array to a. It's the same as:

a = [rand(3..15), a]

Because 'a' has not been assigned at this point, the value you get is

a = [rand(3..15), nil]

However, you *could* simply write:

questions = [ "a slide is placed #{a=rand(3..15)} cm to the left of a 
lens." ]

-- 
Posted via http://www.ruby-forum.com/.