From: Daniel Carrera <dcarrera@...>
Date: 2003-03-28T18:27:27+09:00
Subject: Re: Array question

On Fri, Mar 28, 2003 at 06:14:11PM +0900, Tim Bates wrote:
> On Fri, 28 Mar 2003 7:37 pm, Daniel Carrera wrote:
> > Uh, no it doesn't strike me as what 'join' is supposed to do.
> > Intuitively, I think that a 'join' function should only join the entries
> > of the array and not modify the entries themselves.
> 
> I would agree - otherwise you're combining the functionality of 'join' with 
> 'collect'. What might be useful is for join to take a block which decides 
> what separator to use based on the value of the previous item,

That'd be cool.

> eg:
>   (1..10).to_a.join { |i|
>     i % 2 == 0 ? " " : "-"
>   } # => "1-2 3-4 5-6 7-8 9-10"
> This is a trivial example, and I can't think of a real example off the top of 
> my head,

# Set the path according to the OS.
path = directories.joing { |i|
	CONFIG["host_os"] =~ /Win/ ? "%" : ":"
}

-- 
Daniel Carrera
Graduate Teaching Assistant.  Math Dept.
University of Maryland.  (301) 405-5137
--
depone: depone (di-POHN) verb tr., intr.
   To declare under oath.