«

I want to find the easiest way if one array is a subset of another

for example

A b
[1,2,4,5,6,7,9] [1,3,9] =>true

A b
[1,2,4,5,6,7,9] [1,3,8] =>false
--
Posted via http://www.ruby-forum.com/.

Oop, i already found

http://adzdavies.blogspot.com/2008/0...supersets.html

b.to_set.subset?(a.to_set)
--
Posted via http://www.ruby-forum.com/.

PiAtLS0tLU9yaWdpbmFsIE1lc3NhZ2UtLS0tLQ0KPiBGcm9tOi BzdXBlcmRpc2Nvbm5lY3RAaG90
bWFpbC5jb20gW21haWx0bzpzdXBlcmRpc2Nvbm5lY3RAaG90bW FpbC5jb21dDQo+IFNlbnQ6IE1v
bmRheSwgQXVndXN0IDAzLCAyMDA5IDEwOjEzIFBNDQo+IFRvOi BydWJ5LXRhbGsgTUwNCj4gU3Vi
amVjdDogVGhlIEVhc2llc3Qgd2F5IHRvIGNoZWNrIGlmIG9uZS BhcnJheSBpcyBhIHN1YnNldCBv
ZiBhbm90aGVyDQo+IA0KPiBJIHdhbnQgdG8gZmluZCB0aGUgZW FzaWVzdCB3YXkgaWYgb25lIGFy
cmF5IGlzIGEgc3Vic2V0IG9mIGFub3RoZXINCj4gDQo+IGZvci BleGFtcGxlDQo+IA0KPiAgQSAg
ICAgICAgICAgICAgICAgICAgYg0KPiBbMSwyLDQsNSw2LDcsOV 0gICAgICBbMSwzLDldID0+dHJ1
ZQ0KPiANCj4gIEEgICAgICAgICAgICAgICAgICAgIGINCj4gWz EsMiw0LDUsNiw3LDldICAgICAg
WzEsMyw4XSA9PmZhbHNlDQo+IC0tDQo+IFBvc3RlZCB2aWEgaH R0cDovL3d3dy5ydWJ5LWZvcnVt
LmNvbS8uDQoNCg0KSWYgSSB1bmRlcnN0YW5kIGNvcnJlY3RseS B3aGF0IHlvdSByZWFsbHkgd2Fu
dCwgdGhlIGZpcnN0IGV4YW1wbGUgc2hvdWxkIHByb2R1Y2UgZm Fsc2UsIGFzIGFycmF5ICJhIiBk
b2VzIG5vdCBoYXZlIDMuIEFzc3VtaW5nIHRoYXQgeW91IG1lYW 50IFsxLDIsMyw0LDUsNiw3LDld
IEkgdGhpbmsgdGhlIGZvbGxvd2luZyB3aWxsIHdvcmsgZm9yIH lvdToNCg0KKGEgJiBiKSA9PSBi
DQoNCkdlbm5hZHkuDQoNCg==