closure

// closure 001

let superstar001 = { (name : String, yearOfBirth : Int) -> String in

    return "name : \(name), yearOfBirth : \(yearOfBirth)"

}

print(superstar001("nature boy", 1949)) // name : nature boy, yearOfBirth : 1949

 

// closure 002

let superstar002 = { (name : String, yearOfBirth : Int) -> String in

    "name : \(name), yearOfBirth : \(yearOfBirth)"

}

print(superstar002("dead man", 1965)) // name : dead man, yearOfBirth : 1965

 

// closure 003

let superstar003 = { (name : String, yearOfBirth : Int) in

    "name : \(name), yearOfBirth : \(yearOfBirth)"

}

print(superstar003("never give up", 1977)) // name : never give up, yearOfBirth : 1977

 

// closure 004

let superstar004 : (String, Int) -> String = { name, yearOfBirth in

    "name : \(name), yearOfBirth : \(yearOfBirth)"

}

print(superstar004("leukemia", 1985)) // name : leukemia, yearOfBirth : 1985

 

// closure 005

let superstar005 : (String, Int) -> String = {

    "name : \($0), yearOfBirth : \($1)"

}

print(superstar005("3:16", 1964)) // name : 3:16, yearOfBirth : 1964

 

// closure - function

// closure

import UIKit

 

let names = ["apple", "air", "android", "banana", "note", "cat", "blue", "wrestle"]

 

// closure - contains

let containsSomeText : (String, String) -> Bool = { name, find in

    if name.contains(find) {

        return true

    }

    return false

}

print(containsSomeText(names[0], "a")) // result : true

print(containsSomeText(names[0], "b")) // result : false

print(containsSomeText(names[0], "p")) // result : true

 

// closure - first

let isStartSomeText: (String, String) -> Bool = { name, find in

    if name.first?.description == find {

        return true

    }

    return false

}

print(isStartSomeText(names[1], "a")) // result : true

print(isStartSomeText(names[1], "i")) // result : false

print(isStartSomeText(names[2], "a")) // result : true

 

func find(findString : String, condition: (String, String) -> Bool) -> [String] {

    var newNames = [String]()

    for name in names {

        if condition(name, findString) {

            newNames.append(name)

        }

    }

    return newNames

}

print(find(findString: "a", condition: containsSomeText)) // result : ["apple", "air", "android", "banana", "cat"]

print(find(findString: "a", condition: isStartSomeText)) // result : ["apple", "air", "android"]

 

func someFind(find: String) -> [String] {

    var newNames = [String]()

    

    for name in names {

        if name.contains(find) {

            newNames.append(name)

        }

    }

    return newNames

}

print(someFind(find: "n")) // result : ["android", "banana", "note"]