Trying to set up new API for a bunch of financial modules/scripts using Moo/Moose - I am toying with OOP and not had a massive exposure to that - but just for starters which if either of these four APIs call would be considered better/cleaner and why? 
1) $fx->new('EUR', 'USD');
2) $fx->new('EUR/USD');
3) $fx->new(base => 'EUR', quote => 'USD');
4) $fx->new(pair => 'EUR/USD');

[download]

or does it make b*gger all difference?

can I get Moose to just accept a pair as a 'default' parameter (#2 above - if so how?)

Thanks

In reply to API Design by Galdor

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