From: GianFranco Bozzetti <gf.bozzetti@...>
Date: 2010-08-04T19:22:59+09:00
Subject: Re: Remove the error

Avoid expressions returning  tre/false as if or nil as puts.
Two possible solutions:
1-
sum = array.inject(0) do |memo,item|
        item == 3 ? (memo) : (memo + item)
        end
puts "Sum = #{sum}"

2-
sum=0
puts "item    sum"
array.each { |item| item == 3 ? (sum):(sum += item); printf "%4d 
%6d\n",item,sum  }
puts "Sum = #{sum}"

HTH gfb

"Amir Ebrahimifard" <amiref@ymail.com> wrote in message 
news:224ee235f7c68ed448aa8d66d540fbc8@ruby-forum.com...
> Hi
> Why these codes result error ?
>
> 1-
> array = [*1..10]
> sum = array.inject { |memo,item| memo+item if item !=3 }
>
> 2-
> array = [*1..10]
> sum = array.inject { |memo,item| puts memo+item }
> -- 
> Posted via http://www.ruby-forum.com/.
>