Code snippets for Swift symposium #2

symposium.swift

// About character counting in UTF-8 and Swift
var str = "かきくがぎぐ🇯🇵"

str.characters.count
str.unicodeScalars.count

let s1 = "\u{E9}"
let s2 = "\u{65}\u{301}"

// Compatibility equivalence and Canonical Equivalent
(s1 == s2)
(s1 as NSString) == (s2 as NSString)
let a = (s1 as NSString).compare(s2)
a.rawValue

let taka1  = "高"
let taka2  = "髙" // ハシゴの方
let isEq = (taka1 == taka2)

// overloadの評価基準がSwiftに明確に書かれていない
func hoge(hoge:String) -> Int {
    return 1
}

func hoge(hoge:Int) -> Int {
    return 2
}

func hoge(hoge:AnyObject) -> Int {
    return 3
}
hoge("a")
hoge("a" as NSString)