3.0 //初始化数组的大小和初始值
var allZeros = [Int](repeatElement(0, count: 5))
var empty6 = Array(repeating: "4.5", count: 5);
var allZeros = [Int](repeatElement(0, count: 5))
var empty6 = Array(repeating: "4.5", count: 5);
2017-02-01
skillsOfA.union(skillsOfB)
skillsOfA.formUnion(skillsOfB)
skillsOfA.intersection(skillsOfB)
skillsOfA.formIntersection(skillsOfB)
skillsOfA.formUnion(skillsOfB)
skillsOfA.intersection(skillsOfB)
skillsOfA.formIntersection(skillsOfB)
2017-01-13
最赞回答 / 哆啦A梦_0001
func toBinary( num:Int)->String{ var num = num var res = "" repeat{ res = String(num%2) + res num /= 2 //2需要是个Int类型 }while num != 0 // while后面没有大括号 return res}
2017-01-04