// 可以通过在客串中加\()的方式把值转换成字符串
let Int2Str = "translate int in string with \(VarInt) \(ss)"
-println(Int2Str)
+print(Int2Str)
// 数组
var arrayList = ["apple", "microsoft", "xx", "google", "tencent", "twitter"]
arrayList[2] = "amazon"
-println(arrayList)
+print(arrayList)
// 字典
var dict = [
"apple" : "USA",
"tencnet" : "CN"
]
-println(dict)
-println(dict["apple"])
-println(dict["apple"]!)
+print(dict)
+print(dict["apple"])
+print(dict["apple"]!)
// 创建空数组和空字典
var EmptyArray = [String]()
var EmptDictWithNoType = [:]
for cp in arrayList {
- println(cp)
+ print(cp)
}
var OptionalVar:String? = "hehe"
//OptionalVar = nil
if let name = OptionalVar {
- println("Hello \(OptionalVar)")
+ print("Hello \(OptionalVar)")
}
else
{
- println("sssssss")
+ print("sssssss")
}
switch word {
case "dd" :
- println("unknown")
+ print("unknown")
case "ff" :
- println("fallthrough")
+ print("fallthrough")
fallthrough // 会走到下一个case
case "red apple", "blue apple" :
- println("red")
+ print("red")
default: // 必须在最后。。。
- println("default");
+ print("default");
}
// 闭区间
for i in 0...3 {
- print(i)
+ print(i, terminator: "")
}
-println("")
+print("")
// 开区间
for i in 0..<3 {
- print(i)
+ print(i, terminator: "")
}
for i in 0..<arrayList.count {
- println("arrayList的第\(i+1)个元素为 \(arrayList[i])")
+ print("arrayList的第\(i+1)个元素为 \(arrayList[i])")
}
//let optIntStr = "ffffffff"
let optIntStr = "123"
-let optInt = optIntStr.toInt()
+let optInt = Int(optIntStr)
if optInt != nil {
- println("\(optIntStr) has integer value of \(optInt!)")
- println("\(optIntStr) has integer value of \(optInt)")
+ print("\(optIntStr) has integer value of \(optInt!)")
+ print("\(optIntStr) has integer value of \(optInt)")
} else {
- println("\(optIntStr) could not be converted to an integer")
+ print("\(optIntStr) could not be converted to an integer")
}
let possableString:String?="An optional string"
-println(possableString!)
+print(possableString!)
let assumedString:String!="An implicitly unwrapped optional string"
-println(assumedString)
+print(assumedString)
var opt:String="aaa"
// opt=nil // 如果声明没有? 或 ! 来表明这是一个可选类型，那么 nil的赋值不合法
-print(opt)
+print(opt, terminator: "")
//assert(opt != "aaa", "assert failed")
// String
var s = "aaaaaa\0bbbbb\tccccc\\\n\"\'"
-println(s)
+print(s)
var emptySa = ""
var emptySb = String()
if emptySa.isEmpty && emptySb.isEmpty {
- println("emptySa and emptySb is empty")
+ print("emptySa and emptySb is empty")
}
var emojiStr = "😘😡👿😜"
-for c in emojiStr {
- print(c)
+for c in emojiStr.characters {
+ print(c, terminator: "")
}
var smileChar:Character = "😀"
emojiStr.append(smileChar)
-println(" emojistr \(emojiStr) charactor count is \(count(emojiStr))")
+print(" emojistr \(emojiStr) charactor count is \(emojiStr.characters.count)")
s = "Prefix----Suffix"
if s.hasPrefix("Prefix") && s.hasSuffix("Suffix") {
- println(s.lowercaseString)
- println(s.uppercaseString)
+ print(s.lowercaseString)
+ print(s.uppercaseString)
}
IntArray.insert(1, atIndex: 0)
IntArray.removeAtIndex(5)
IntArray.removeLast()
-println(IntArray)
-for (index, value) in enumerate(IntArray) {
- println("Item \(index+1): \(value)")
+print(IntArray)
+for (index, value) in IntArray.enumerate() {
+ print("Item \(index+1): \(value)")
}
for i in 1...5 {
DoubleArray.append(Double(i)*1.1)
}
-println(DoubleArray)
+print(DoubleArray)
// Set
SetA.insert(2)
SetA.insert(1)
if SetA.contains(1) {
- println(SetA)
+ print(SetA)
}
-for genre in sorted(SetA) {
- println("\(genre)")
+for genre in SetA.sort() {
+ print("\(genre)")
}
let oddSet:Set = [1, 3, 5, 7, 9]
let evenSet:Set = [0, 2, 4, 6, 8]
-println(sorted(oddSet.intersect(evenSet))) // 交
-println(sorted(oddSet.union(evenSet))) // 并
-println(oddSet.hashValue)
+print(oddSet.intersect(evenSet).sort()) // 交
+print(oddSet.union(evenSet).sort()) // 并
+print(oddSet.hashValue)
// Dict
airports["LHR"] = "London"
airports["APL"] = "Apple Internation"
if let oldValue = airports.updateValue("Dublin Internation", forKey: "DUB") {
- println("The old value for DIB was \(oldValue)")
+ print("The old value for DIB was \(oldValue)")
}
for (k, v) in airports {
- println("\(k): \(v)")
+ print("\(k): \(v)")
}
for k in airports.keys {
- println("Airport Code: \(k)")
+ print("Airport Code: \(k)")
}
for v in airports.values {
- println("Airport Name: \(v)")
+ print("Airport Name: \(v)")
}
-println(airports)
+print(airports)
airports["APL"] = nil // Delete
-println(airports)
+print(airports)
if let removedValue = airports.removeValueForKey("DUB") {
- println("The removed airport's name is \(removedValue)")
+ print("The removed airport's name is \(removedValue)")
} else {
- println("The airports dictionary does not contain a value for DUB")
+ print("The airports dictionary does not contain a value for DUB")
}
// create an empty dict