From: William James <w_a_x_man@...>
Date: 2007-05-04T11:10:04+09:00
Subject: Re: Is there a better way to do this?

On May 3, 8:38 pm, Dan Zwell <dzw...@gmail.com> wrote:
> > I am trying to come up with a "generic" formatting routine so that I
> > could feed it something like sform("123456789", "000-00-0000") or
> > sform("1234567890", "(000) 000-0000") or sform("123456", "00/00/00") and
> > it would work.  I could easily do something like you suggest, and for
> > some cases it might be better, but I want something I can for any number
> > of formats.  Thanks for the input.
>
> welcome.
>
> require 'enumerator'
>
> def sform(num, fmt)
>    # convert num to array (of one digit strings):
>    num = num.to_enum(:each_byte).map { |code| code.chr }
>
>    # for each zero, replace it with a digit popped off the
>    # front of the array of numbers (or characters):
>    fmt.gsub(/0/) { num.shift }
> end
>
> dan

Without 'enumerator':

def sform( str, fmt )
  ary = str.split(//)
  fmt.gsub( /0/ ){ ary.shift }
end