Hi Norbert:
An idiom that I use frequently is:
h = {}
(h[key] ||= []) << item
which essentially says "if hash h[key] is nil, create an empty array for
that key. then push item onto the array. for example:
>> h = {}
=> {}
>> (h["cats"] ||= []) << "Jellicle"
=> ["Jellicle"]
>> (h["cats"] ||= []) << "Mr. Mistoffelees"
=> ["Jellicle", "Mr. Mistoffelees"]
Is that what you were looking for?
- ff
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