Hi Monks,

As pointed out to me in Re^3: Turning foreach into map?, I should really be trying to learn refs instead of map just now.

I have been reading perlreftut, and started to get an idea for the first program I want to write to learn refs.

The program will simply ask for some food types and tell you if you can eat them together, according to a combination chart (This is taken from the, "You Are What You Eat Cookbook").

Following the example, I have a data format as follows (HoAs?) and I just want to check this is correct before moving on to the code:

%food_combining
----------------
        
proteins                  ---->| Cheese  | Eggs | Fish | Game | Rabbit
+ | Meat | Milk | Nuts | Poultry | Shellfish | Soybeans | tofu | soya 
+| Yogurt
       
carbohydrates             ---->| oats | pasta | rice | rye | maize | m
+illet | biscuits | bread | cakes | crackers | pastry | honey | maple 
+syrup | potatoes | yams | sweetcorn | sugar | sweets 
        
nonstarchy_veg_and_fats   ---->| Butter | Cream | Herbs | Spices | Sea
+sonings | Olive Oils | Oils | Salads | Seeds

Fruit                     ---->| All Fruit

[download]

The rules, once someone enters something via <STDIN>, are:

Yes:
Groups 1 and 3
Groups 2 and 3
Group 4 alone

No:
Groups 1 and 2
Groups 1 and 4
Groups 2 and 4
Groups 3 and 4

[download]

If so, I'll start writing.

Thanks.

Walking the road to enlightenment... I found a penguin and a camel on the way.....
Fancy a yourname@perl.me.uk? Just ask!!!

In reply to Continuing from "Turning foreach into map?" - perlreftut and References by ghenry

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