Arrays
//Type inference
//Explicit format:
var fruitList: Array<String> = ["apple", "banana"]
//Explicit shortcut format:
var fruitList: [String] = ["apple", "banana"]
fruitList[1] = "orange"
//fruitList =["apple", "orange"]
Number of Items
println("The fruitList contains \(fruitList.count) items.")
//Console output: The fruitList contains 2 items.
Item Addition
fruitList[2] = "strawberry"
//Wrong: fatal error: Array index out of range
//Correct Method1: Use "append" to add item:
fruitList.append("strawberry")
//fruitList = ["apple", "orange", "strawberry"]
//Correct Method2: Use "+=":
fruitList += ("kiwifruit")
//fruitList = ["apple", "orange", "strawberry", "kiwifruit"]
//Insert an Item to a specific location
fruitList.insert("mango", atIndex: 2)
//fruitList = ["apple", "orange", "mango", "strawberry", "kiwifruit"]
Item Removal
fruitList.removeAtIndex(3)
//fruitList = ["apple", "orange", "mango", "kiwifruit"]
var removedItem = fruitList.removeLast()
//fruitList = ["apple", "orange", "mango"]
//removedItem = "kiwifruit"
Check if the array is empty:
if fruitList.isEmpty {
}
for loop: Iterating over the array
for itemCount in fruitList {
println(itemCount)
}
//Console output:
apple
orange
mango
================================
Initialize an empty array
var intArray = [Int]()
//intArray is of type Int[]
println("intArray has \(intArray.count) items.")
//Console output: intArray has 0 items.
Add new item
intArray.append(2)
intArray.append(2)
//intArray = [2]
Reset the array
Reset the array
intArray = []
Other method for creating arrays
var oneArray = Int[](count: 2, repeatedValue: 1) //[1, 1]
var zeroArray = Int[](count: 3, repeatedValue: 0) //[0, 0, 0]
var combinedArray = oneArray + zeroArray //[1, 1, 0, 0, 0]
