From: "リヴェリエ" <pxthanh299@...>
Date: 2010-06-14T06:31:41+09:00
Subject: Re: Idiomatic Printing an array with commas

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You can always try a * ", "

% irb --simple-prompt
>> a = ["a","b","c"]
=> ["a", "b", "c"]
>> a * ", "
=> "a, b, c"

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