I have to think if the asSet is needed too.
In fact I want in addition
intersectionAndDifferences: aColl
because I want to be able to define nicely
merge: aDict onKeyConflictDoValues: aBlock
as follow
| d d2 |
d := #(1 3 4 5 ) groupedBy: #even.
d2 := #(10 31 41 50 ) groupedBy: #even.
d merge: d2 onKeyConflictDoValues: [ :aValue :anotherValue | (aValue,
anotherValue) asSet asOrderedCollection ]
Because manipulating dictionaries whose values are collections is boring.
Stef
On 14 Mar 2014, at 23:15, Sven Van Caekenberghe <[email protected]> wrote:
> Are the final #asArray conversions always needed ?
> If not, it would be more efficient not to do them every time, no ?
>
> On 14 Mar 2014, at 22:19, Pharo4Stef <[email protected]> wrote:
>
>> something like that
>>
>> diffs: aCollection
>> "Answer the set theoretic differences of two collections. The first
>> element of the result is the difference from the perspective of the receiver
>> and the second element the difference from the perspective of the argument."
>>
>> "#(a b c d e f) diffs: #(a b z k) #(#a #b #c #d #e #f)
>> { #(#f #d #e #c) . #(#k #z)}
>> "
>> "{ self difference: aCollection . aCollection difference: self }"
>>
>> | receiver another |
>> receiver := self asSet.
>> another := aCollection asSet.
>> self do: [ :each |
>> (another includes: each)
>> ifTrue: [ receiver remove: each.
>> another
>> remove: each ]].
>> ^ { receiver asArray . another asArray}
>>
>
>
