From: Michael Morin <uzimonkey@...>
Date: 2008-08-31T04:57:46+09:00
Subject: Re: Show elements of array separated

David A. Black wrote:
> Hi --
> 
> On Sat, 30 Aug 2008, Michael Morin wrote:
> 
>> Robert Klemme wrote:
>>> irb(main):010:0> foo.inject {|a,b| "#{a}, #{b}"}
>>> => "a, b, c"
>>> irb(main):011:0> ["a"].inject {|a,b| "#{a}, #{b}"}
>>> => "a"
>>> irb(main):012:0> [].inject {|a,b| "#{a}, #{b}"}
>>> => nil
>>> irb(main):013:0>
>>>
>>> But note the empty Array case.
>>>
>>> Kind regards
>>>
>>>     robert
>>
>> irb(main):006:0> [].inject{|a,b| "#{a}, #{b}" } or ""
>> => ""
> 
> Or:
> 
>  [].inject {...}.to_s
> 
> In any case I think this is a job for #join :-)
> 
> 
> David
> 

Using inject you could do something to each element (capitalize, for 
example) at the same time.  Though, you could just use arr.map.join if 
you wanted to do that.

-- 
Michael Morin
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