From: Philip Rhoades <phil@...>
Date: 2012-11-17T22:50:00+09:00
Subject: Re: Alternatives to methods for large number of nested "ifs"

People,

Thanks to the people who responded - I looked at everything but nothing 
really suited what I was trying to do but see below for some progress 
that I made and another question:


On 2012-11-17 01:35, Philip Rhoades wrote:
> People,
>
> I have an existing script that looks like:
>
> lots of code
> .
> .
> .
> if ..
>   some lines of code
>   if ..
>     some lines of code
>     if ..
>       some lines of code
>       if ..
>         some lines of code
>         if ..
>           some lines of code
> etc
>
> This makes it difficult to see the overall logic so I want to change
> it to something like:
>
> lots of code
> .
> .
> .
> if ..
>   call something
>   if ..
>     call something
>     if ..
>       call something
>       if ..
>         call something
>         if ..
>           call something
> etc
>
> but if I use methods I will have to pass lots of variables or use
> global variables and then it gets clumsy changing everything - is
> there some way of simply calling a block of code and then returning 
> to
> the same position in the nested "ifs"?


I found that I could use sequential "ifs" instead of nested "ifs" by 
using "exit" statements in each "if" block - the script is processing 
incoming mails and can exit when a mail has been satisfactorily 
classified.  I still have something like this:


lots of code
if block - small
lots of code
if block - small
if block - large
if block - small
if block - large
.
.
etc


What I want is to be able to see the whole logic of the program in 
about 25 lines (ie one screenfull of code - ie all the "if" statements) 
- I could probably use standard methods for the repetitive small "if" 
blocks but for the large "lots of code" and "if block - large" I 
definitely can't.  Is it possible that a method can be forced to NOT use 
local variables? - then I could replace the large blocks with these 
sorts of methods.

Thanks,

Phil.

-- 
Philip Rhoades

GPO Box 3411
Sydney NSW	2001
Australia
E-mail:  phil@pricom.com.au