TA貢獻1725條經驗 獲得超8個贊
func uniq<S : SequenceType, T : Hashable where S.Generator.Element == T>(source: S) -> [T] {
var buffer = [T]()
var added = Set<T>()
for elem in source {
if !added.contains(elem) {
buffer.append(elem)
added.insert(elem)
}
}
return buffer}let vals = [1, 4, 2, 2, 6, 24, 15, 2, 60, 15, 6]let uniqueVals = uniq(vals) // [1, 4, 2, 6, 24, 15, 60]func uniq<S : Sequence, T : Hashable>(source: S) -> [T] where S.Iterator.Element == T {
var buffer = [T]()
var added = Set<T>()
for elem in source {
if !added.contains(elem) {
buffer.append(elem)
added.insert(elem)
}
}
return buffer}
TA貢獻1856條經驗 獲得超5個贊
TA貢獻1900條經驗 獲得超5個贊
extension Array where Element:Equatable {
func removeDuplicates() -> [Element] {
var result = [Element]()
for value in self {
if result.contains(value) == false {
result.append(value)
}
}
return result }}let arrayOfInts = [2, 2, 4, 4]print(arrayOfInts.removeDuplicates()) // Prints: [2, 4]
基于屬性的濾波
extension Array {
func filterDuplicates(@noescape includeElement: (lhs:Element, rhs:Element) -> Bool) -> [Element]{
var results = [Element]()
forEach { (element) in
let existingElements = results.filter {
return includeElement(lhs: element, rhs: $0)
}
if existingElements.count == 0 {
results.append(element)
}
}
return results }}let filteredElements = myElements.filterDuplicates { $0.PropertyOne == $1.PropertyOne && $0.PropertyTwo == $1.PropertyTwo }舉報