From: Edward Faulkner <ef@...>
Date: 2005-10-04T04:11:47+09:00
Subject: Re: [SOLUTION] Lisp Game (#49)

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On Tue, Oct 04, 2005 at 04:00:59AM +0900, Warren Brown wrote:
> def describe_set(set)
>   set.inject("") {|s,o| s += "There is a ${o} here. "}
> end

You don't need the assignment.  #inject automatically sets 's' to the
previous value of the block:

set.inject("") {|s,o| s + "There is a ${o} here. "}

The assignment doesn't hurt anything, but it obscures what's really
happening.  For example, this would give the wrong answer:

set.inject("") {|s,o| s += "There is a #{o} here. "; print "Looping\n"}

regards,
Ed

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