From: Jim Bartlett <someone@...>
Date: 2002-09-28T04:24:43+09:00
Subject: Re: Programming Ruby p103 (Pragmatic Programmer)

That was it. I was using puts (1..4).sum. I appreciate all the input from
everyone. Thanks for your help!

Jim.

"Kent Dahl" <kentda@stud.ntnu.no> wrote in message
news:3D94A298.E3578167@stud.ntnu.no...
> Jim Bartlett wrote:
> >
> > I created the "Inject" module as shown in Programming Ruby, p102-103 and
> > included it in the Range class. When I try to get the sum of a range (ie
> > (1..4).sum), it just spits out 1..4 and then an error:
> >
> > undefined method "sum" for nil (NameError)
> >
> > It works fine for arrays when included in class Array. What have I
missed?
> > Thanks.
>
> Let me take a wild guess: You're using puts or print to print the value
> and write:
>  puts (1..4).sum
> or something similar? The puts assumes the parenthesis as its argument
> list, and what is returned by puts (nil) is the object that gets the sum
> message. Try extra parenthesis.
>  puts ((1..4).sum)
>
> --
> (\[ Kent Dahl ]/)_    _~_    __[ http://www.stud.ntnu.no/~kentda/ ]___/~
>  ))\_student_/((  \__d L b__/  NTNU - graduate engineering - 5. year  )
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