From: matz@... (Yukihiro Matsumoto)
Date: 2001-05-01T09:18:23+09:00
Subject: [ruby-talk:14460] Re: How to do it the Ruby-way 2

Hi,

In message "[ruby-talk:14448] How to do it the Ruby-way 2"
    on 01/05/01, Stefan Matthias Aust <sma@3plus4.de> writes:

|I really like the way I can embed ruby code in strings using #{}.
|This code works as expected:
|
| def a(name)
|   print "<#{a.capitalize}>"
| end

I don't get the point.  "<#{name.capitalize}>"?

|but what if the pattern string isn't a constant but also provided with
|that method, let's say:
|
| def a(pat, name)
|   print pat
| end

Do you want to embed the value in pat string?  How about using format
method?

  def a(pat, name)
    print format(pat, name.capitalize)
  end
  a("<%s>", "foobar")

| def a(pat, name)
|  eval "print \"#{pat}\""
| end
|
|But, I think, it's really ugly.  I'd like to use a pattern string read
|in from an external file (from the trusted source) and then emit it
|using all bindings currently available in that method.  How can this
|be achieved?

If the above is what you really want, "eval" is what you need.  I
recommend you the format solution though.

							matz.