+1 Additionally I propose to give more JS friendly method names:
Intersection as `and`: set1and2 = set1.and(set2); Union as `or`: set1or2 = set1.or(set2); Complement as `not`: set1butNot2 = set1.not(set2); Peter Michaux wrote: > > On Mon, Mar 4, 2013 at 10:56 AM, Tab Atkins Jr. <[email protected]> > wrote: >> On Mon, Mar 4, 2013 at 10:08 AM, <[email protected]> wrote: >>> It would be useful to be able to form the intersection and the union of >>> two Sets. These are natural operations that are currently not part of >>> the API >>> (http://wiki.ecmascript.org/doku.php?id=harmony:simple_maps_and_sets). >>> >>> Similar methods would make sense for Map, but one would have to think >>> about what to do in the case where the key but not the value matches. >>> >>> An intersection is equivalent to a particular filter, so an alternative >>> might be to add a method like Array.filter to Sets instead. >>> >>> (I filed bug 847355 for this and was told this mailing list was the >>> right place for this suggestion.) >> >> Yes please, and also minus (remove from set A all elements it shares >> with set B). All three of these are fairly vital for a lot of code >> using sets. > > I agree that these methods would be useful. They are common set > operations and they do seem missing from the Set draft spec. > > Peter > _______________________________________________ > es-discuss mailing list > [email protected] > https://mail.mozilla.org/listinfo/es-discuss > > ----- Mariusz Nowak https://github.com/medikoo -- View this message in context: http://old.nabble.com/Add-intersections-and-unions-to-Set-tp35134737p35243086.html Sent from the Mozilla - ECMAScript 4 discussion mailing list archive at Nabble.com. _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
