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import UIKit
var array1 = [Double](count: 3, repeatedValue: 4.3)
print(array1)
var array2 = array1 + array1
if array1.isEmpty {
print("array1 is empty.")
} else {
print("array1 is not empty, have \(array1.count) numbers.")}
array1.insert(3.2, atIndex: 0)
print(array1)
for item in array1 {
print(item)
}
var letters = Set<Character>()
letters.insert("a")
letters = []
var set1: Set<String> = ["aaa", "b"]
var set2: Set = ["aaa", "b"]
set2.count
set2.insert("33")
set2.remove("b")
set2
for genre in set2.sort() {
print(genre)
}
set1.union(set2)
set1.subtract(set2)
set1.exclusiveOr(set2)
set1.intersect(set2)
let set3: Set<String> = ["33"]
set3.isDisjointWith(set2)
set3.isStrictSubsetOf(set2)
set3.isSubsetOf(set2)
var dict = [Int: String]()
dict[12] = "12222"
dict = [:]
dict = [12: "1222", 23: "232423", 322: "23dsfsaf"]
for (num, value) in dict {
print("\(num) is \(value)")
}
dict[12] = "tw"
for value in dict.values {
print(value)
}
var i = 3
while i < 0 {
print(1)
}
let somePoint = (0, 1)
switch somePoint {
case (0, 0):
print("0")
case (_, 0):
print("is on the x-axis")
case (0, _):
print("is on the y-axis")
default:
print("is outside of the box")
}
if #available(iOS 9, *) {
print(2)
} else {
print(1)
}
var temperatureInFahrenheit = 90
if temperatureInFahrenheit <= 32 {
print("It's very cold. Consider wearing a scarf.")
} else if temperatureInFahrenheit >= 86 {
print("It's really warm. Don't forget to wear sunscreen.")
} else {
print("It's not that cold. Wear a t-shirt.")
}
let someCharacter: Character = "e"
switch someCharacter {
case "a", "e", "i", "o", "u":
print("\(someCharacter) is a vowel")
case "b", "c", "d", "f", "g", "h", "j", "k", "l", "m",
"n", "p", "q", "r", "s", "t", "v", "w", "x", "y", "z":
print("\(someCharacter) is a consonant")
default:
print("\(someCharacter) is not a vowel or a consonant")
}
let yetAnotherPoint = (1, -1)
switch yetAnotherPoint {
case let (x, y) where x == y:
print("(\(x), \(y)) is on the line x == y")
case let (x, y) where x == -y:
print("(\(x), \(y)) is on the line x == -y")
case let (x, y):
print("(\(x), \(y)) is just some arbitrary point")
}
let puzzleInput = "great minds think alike"
var puzzleOutput = ""
for character in puzzleInput.characters {
switch character {
case "a", "e", "i", "o", "u", " ":
continue
default:
puzzleOutput.append(character)
}
}
print(puzzleOutput)
let numberSymbol: Character = "二"
var possibleIntegerValue: Int?
switch numberSymbol {
case "1", "١", "一", "๑":
possibleIntegerValue = 1
case "2", "٢", "二", "๒":
possibleIntegerValue = 2
print("test")
break
case "3", "٣", "三", "๓":
possibleIntegerValue = 3
case "4", "٤", "四", "๔":
possibleIntegerValue = 4
default:
break
}
if let integerValue = possibleIntegerValue {
print("The integer value of \(numberSymbol) is \(integerValue).")
} else {
print("An integer value could not be found for \(numberSymbol).")
}
let integerToDescribe = 5
var description = "The number \(integerToDescribe) is"
switch integerToDescribe {
case 2, 3, 5, 7, 11, 13, 17, 19:
description += " a prime number, and also"
default:
description += " an integer."
}
print(description)
func greet(person: [String: String]) {
guard let name = person["name"] else {
return
}
print("Hello \(name)")
guard let location = person["location"] else {
print("I hope the weather is nice near you.")
return
}
print("I hope the weather is nice in \(location).")
}
greet(["name": "John"])
greet(["name": "Jane", "location": "Cupertino"])
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