Is there an Ordered Dictionary?
Bert Freudenberg
bert at isg.cs.uni-magdeburg.de
Thu Jan 9 21:39:55 UTC 2003
On Thu, 9 Jan 2003, Derek Brans wrote:
> Is there a dictionary that holds its associations in the same order you
> add them in?
>
> So, if I do
> dict at: 'first field' put: firstValue
> dict at: 'secondfield' put: secondValue
> dict associationsDo: [ ... ]
>
> it will do them in order?
You can use an OrderedCollection:
odict := OrderedCollection new.
odict add: 'first field' -> firstValue.
odict add: 'secondfield' -> secondValue.
odict do: [:asso | ... ]
> BTW, on the subject of dictionaries, are you supposed to use
> associationsDo to iterate over all key - value pairs?
dict keysAndValuesDo: [:key :value | ... ]
> If so, why is the name for such a common operation so long and specific
Because it exactly describes what it does.
-- Bert
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