# Proposal: SuperSet

Jordan Harband ljharb at gmail.com
Tue Jul 9 20:31:43 UTC 2019

```Are you perhaps looking for https://github.com/tc39/proposal-set-methods ?

On Tue, Jul 9, 2019 at 1:18 PM Oğuz Kılıç <oguzz.kilic at gmail.com> wrote:

> Yes, I already consider it as an enriched version of the current set
> method, I just like calling it superset :)
>
> On Tue, Jul 9, 2019 at 11:05 PM Григорий Карелин <grundiss at gmail.com>
> wrote:
>
>> Maybe add those methods into Set instead of creating new type?
>>
>> On Tue, 9 Jul 2019 at 23:02, Oğuz Kılıç <oguzz.kilic at gmail.com> wrote:
>>
>>> As you know, the current Set feature is not sufficient in some aspects.
>>> We benefit from utility libraries or special implementations to fill this
>>> deficiency.
>>>
>>> For example, wouldn’t it be better if we had the following approach?
>>>
>>> UNION
>>>
>>> X ∪ Y = { x | x ∈ X or x ∈ Y }
>>>
>>> let first = new SuperSet(["a", "b", "c"]);
>>> let second = new SuperSet(["b", "c", "d", "e"]);
>>>
>>> first.union(second); //→ SuperSet { "a", "b", "c", "d", "e" }
>>>
>>> DIFFERENCE
>>>
>>> X - Y = { x | x ∈ X and x ∉ Y }
>>>
>>> let nums = new SuperSet([3, 4, 5, 6]);
>>> let primes = new SuperSet([2, 3, 5, 7]);
>>>
>>> nums.diff(primes); // → SuperSet { 4, 6 }
>>>
>>> INTERSECT
>>>
>>> X ∩ Y = { x | x ∈ X and x ∈ Y }
>>>
>>> let nums = new SuperSet([3, 4, 5, 6]);
>>> let primes = new SuperSet([2, 3, 5, 7]);
>>> nums.intersect(primes); // → SuperSet { 3, 5 }
>>>
>>> DISCARD
>>>
>>> let nums = new SuperSet([1, 2, 3, 4]);
>>> nums.discard([1, 3]); // → SuperSet { 2, 4 }
>>>
>>> Motivation
>>> SuperSet - https://github.com/BYK/superset
>>> _______________________________________________
>>> es-discuss mailing list
>>> es-discuss at mozilla.org
>>> https://mail.mozilla.org/listinfo/es-discuss
>>>
>> --
>> Отправлено с мобильного устройства
>>
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