I've been trying to design my read only Array data structure and I really like the idea of providing traversing options with Enumerable class, but I cannot find requirements of it. In some examples that I've looked, the C implementation looks for #each
method, but it seems to me that it can't be enough.
From Pickaxe p. 474 and also from the core documentation:
The class [mixing in Enumerable] must provide a method
each
, which yields successive members of the collection. IfEnumerable#max
,min
,sort
, orsort_by
is used, the objects in the collection must also implement a meaningful<=>
operator, because these methods rely on an ordering between members of a collection.
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