Swift var-let-array-dict

var-let-array-dict.swift

//  Created by efe ertugrul on 18/08/16.

import Cocoa

// VAR - LET - ARRAY - DICTIONARY


// constants
let anInt : Int = 1
let aDouble : Double = 1.0
let aFloat : Float = 1.0
let aString : String = "bir"

// optional variables can be 'nil'
var anOptionalInt : Int? = 1
var anOptionalDouble : Double? = 1.0
var anOptionalFloat : Float? = 1.0
var anOptionalString : String? = "bir"

// empty array and dictionary
var anArray : [Int] = []
var aDictionary : [String:String] = [:]

// optional empty array and dictionary
var anOptionalArray : [Int?] = []
var anOptionalDictionary : [String:String?] = [:]

// add item to array
anArray.append(0)
anArray.append(1)
anArray.append(2)

// add item to optional array
anOptionalArray.append(0)
anOptionalArray.append(nil)
anOptionalArray.append(2)

// add item to dictionary
aDictionary["0"] = "sıfır"
aDictionary["1"] = "bir"
aDictionary["2"] = "iki"

// add item to optional dictionary
anOptionalDictionary["0"] = "sıfır"
anOptionalDictionary["1"] = nil
anOptionalDictionary["3"] = "üç"

// mixed array and dictionary
var mixedArray = [Any]()
var mixedDictionary = [String: Any]()

// add item to mixed array
mixedArray.append(0)
mixedArray.append("bir")
mixedArray.append(1.25)
mixedArray.append([334,55,33,22])
mixedArray.append(["ssd":[33,"ddds",445]])

// add item to mixed dictionary
mixedDictionary["0"] = 15
mixedDictionary["1"] = "bir"
mixedDictionary["2"] = [33:45]
mixedDictionary["3"] = [22,34,33,"ksks"]
mixedDictionary["4"] = ["current":[23,55,3,44,2]]

// optional mixed array and dictionary
var optionalMixedArray = [Any?]()
var optionalMixedDictionary = [String:Any?]()

// add item to optional mixed array
optionalMixedArray.append(0)
optionalMixedArray.append("bir")
optionalMixedArray.append(nil)
optionalMixedArray.append([33,44,33,22])
optionalMixedArray.append(["ssd":[33,"ddds",445]])

// add item to optional mixed dictionary
optionalMixedDictionary["0"] = 15
optionalMixedDictionary["1"] = nil
optionalMixedDictionary["2"] = [33:33]
optionalMixedDictionary["3"] = [22,34,33]
optionalMixedDictionary["4"] = ["current":[23,55,3,44,2]]

// printing
print("anArray : \(anArray)")
print("aDictionary : \(aDictionary)")
print("anOptionalArray : \(anOptionalArray)")
print("anOptionalDictionary : \(anOptionalDictionary)")
print("mixedArray : \(mixedArray)")
print("mixedDictionary : \(mixedDictionary)")
print("optionalMixedArray : \(optionalMixedArray)")
print("optionalMixedDictionary : \(optionalMixedDictionary)") // doesn't print 'nil's !!


print("---------")
print(anArray)
print(aDictionary)

// delete an item from array and dictionary
anArray.remove(at: 0)
aDictionary.removeValue(forKey: "0")

print("---------")
print(anArray)
print(aDictionary)

// change an item in array or dictionary
anArray[0] = 33
aDictionary["0"] = "dkdkdkdk"

print("---------")
print(anArray)
print(aDictionary)

// sort array items
anArray.sort() // incremental
anArray.sort( isOrderedBefore: { $0 > $1 } ) // decremental

// check if an element exists

anArray.contains(33)

print("---------")
print(anArray)
print(aDictionary)

// delete all items in array and dictionary
anArray.removeAll()
aDictionary.removeAll()

print("---------")
print(anArray)
print(aDictionary)