From: Dark Ambient <sambient@...>
Date: 2006-07-01T09:26:10+09:00
Subject: Re: Order of precedence

wow, while I've been using irb for some things, I am now a true believer.

I have been struggling to understand a calculation in some code .
Checking the calc in my head.

It made me forget an important Ruby and probably all programming languages rule.

Here is the code:

left = 22
write = left/10  # I'm was thinking should return 2.2, but no it
returns just 2 (no modulus)
left = left - write*10 # based on the wrong head calculation above it
was not allowing me to
                            # what this value truly is.

Well, lesson learned.

Stuart

On 6/30/06, Austin Ziegler <halostatue@gmail.com> wrote:
> On 6/30/06, Dark Ambient <sambient@gmail.com> wrote:
> > Just checking
> >
> > if I have
> >
> > a = a - b*c
> >
> > b*c gets calculated first then that result is subtracted from a ?
> > In other words, parantheses, in Ruby, is not necessary to make that
> > calculation ?
>
> It's best to check this sort of thing in irb.
>
> -austin
> --
> Austin Ziegler * halostatue@gmail.com * http://www.halostatue.ca/
>                * austin@halostatue.ca * http://www.halostatue.ca/feed/
>                * austin@zieglers.ca
>
>