ios - Deselect Tablerow remove indexrow -

when select multiple rows should add in array maximum size of 2.

for example select row 1 , 2 names "a" , "b". if deselect "a" want array remove value.

i select ["a", "b"]

i decide deselect "a" should remove array ["b"]

var rows: [string] = []  func tableview(tableview: uitableview, willselectrowatindexpath indexpath: nsindexpath) -> nsindexpath? {      rows.append(values[indexpath.row]) }  func tableview(tableview: uitableview, diddeselectrowatindexpath indexpath: nsindexpath) {     rows.remove(values[indexpath.row]) }  extension array element: equatable {     func remove(e: element) {         // iam stuck here     } } 

here want:

extension array element: equatable {      mutating func remove(e: element) {         if let = self.indexof(e) {             self.removeatindex(i)         }     } }