From: "Eustáquio 'TaQ' Rangel" <eustaquiorangel@...>
Date: 2008-03-27T04:04:30+09:00
Subject: Re: The inject function

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Robert Klemme wrote:
| On 26.03.2008 15:32, Eust�quio 'TaQ' Rangel wrote:
|> You could use a test to sum the number only when it's even on inject, but
|> [1,2,3,4,5,6].inject {|m,v| m + (v%2==0?v:0) }
|> results to 13, because seems that the value of m is automatically the
|> first
|> element of the array. On this case, you can tell it to start with 0:
|> [1,2,3,4,5,6].inject(0) {|m,v| m + (v%2==0?v:0) }
| Actually these two are not equivalent!  You should usually use the
| second form because the first form will return nil for an empty Array.

Hi Robert!

Yeah, and I just put the first form because at first glance they look equivalent
for newbies on the language and can make some confusion for "where are the 1
value coming from". :-)

Regards,
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