10个惊艳的Swift单行代码

let words = ["Swift","iOS","cocoa","OSX","tvOS"]
let tweet = "This is an example tweet larking about Swift"
let valid = !words.filter({tweet.containsString($0)}).isEmpty
valid //true

tweet.characters
.split(" ")
.lazy
.map(String.init)
.contains(Set(words).contains)

let path = NSBundle.mainBundle().pathForResource("test", ofType: "txt")
let lines = try? String(contentsOfFile: path!).characters.split{$0 == "\n"}.map(String.init)
if let lines=lines {
  lines[0] // O! for a Muse of fire, that would ascend
  lines[1] // The brightest heaven of invention!
  lines[2] // A kingdom for a stage, princes to act
  lines[3] // And monarchs to behold the swelling scene.
}

let name = "uraimo"
(1...4).forEach{print("Happy Birthday " + (($0 == 3) ? "dear \(name)":"to You"))}

extension SequenceType{
    typealias Element = Self.Generator.Element
    func partitionBy(fu: (Element)->Bool)->([Element],[Element]){
    var first=[Element]()
    var second=[Element]()
    for el in self {
    if fu(el) {
    first.append(el)
  }else{
    second.append(el)
    }
  }
    return (first,second)
  }
}
let part = [82, 58, 76, 49, 88, 90].partitionBy{$0 < 60}
part // ([58, 49], [82, 76, 88, 90])

extension SequenceType{
  func anotherPartitionBy(fu: (Self.Generator.Element)->Bool)->([Self.Generator.Element],[Self.Generator.Element]){
    return (self.filter(fu),self.filter({!fu($0)}))
  }
}
let part2 = [82, 58, 76, 49, 88, 90].anotherPartitionBy{$0 < 60}
part2 // ([58, 49], [82, 76, 88, 90])

var part3 = [82, 58, 76, 49, 88, 90].reduce( ([],[]), combine: {
  (a:([Int],[Int]),n:Int) -> ([Int],[Int]) in
  (n<60) ? (a.0+[n],a.1) : (a.0,a.1+[n])
})
part3 // ([58, 49], [82, 76, 88, 90])

let xmlDoc = try? AEXMLDocument(xmlData: NSData(contentsOfURL: NSURL(string:"https://www.ibiblio.org/xml/examples/shakespeare/hen_v.xml")!)!)
if let xmlDoc=xmlDoc {
  var prologue = xmlDoc.root.children[6]["PROLOGUE"]["SPEECH"]
  prologue.children[1].stringValue // Now all the youth of England are on fire,
  prologue.children[2].stringValue // And silken dalliance in the wardrobe lies:
  prologue.children[3].stringValue // Now thrive the armourers, and honour's thought
  prologue.children[4].stringValue // Reigns solely in the breast of every man:
  prologue.children[5].stringValue // They sell the pasture now to buy the horse,
}

//Find the minimum of an array of Ints
[10,-22,753,55,137,-1,-279,1034,77].sort().first
[10,-22,753,55,137,-1,-279,1034,77].reduce(Int.max, combine: min)
[10,-22,753,55,137,-1,-279,1034,77].minElement()
//Find the maximum of an array of Ints
[10,-22,753,55,137,-1,-279,1034,77].sort().last
[10,-22,753,55,137,-1,-279,1034,77].reduce(Int.min, combine: max)
[10,-22,753,55,137,-1,-279,1034,77].maxElement()

var n = 50
var primes = Set(2...n)
(2...Int(sqrt(Double(n)))).forEach{primes.subtractInPlace((2*$0).stride(through:n, by:$0))}
primes.sort()

var sameprimes = Set(2...n)
sameprimes.subtractInPlace((2...Int(sqrt(Double(n))))
.flatMap{ (2*$0).stride(through:n, by:$0)})
sameprimes.sort()

var a=1,b=2
(a,b) = (b,a)
a //2
b //1