Swift Development Array Details use

//

Viewcontroller.swift

Swift+array

Import UIKit

Class Viewcontroller:uiviewcontroller {

Override Func Viewdidload () {

Super.viewdidload ()

Self.view.backgroundColor = Uicolor.yellow;

Array initialization

var numbers = [1,2,3,4,5,6];

Print (Numbers)

var vowels = ["A", "B", "C", "D"];

Print (vowels)

Let Emptyarray = [Int] ()

Array length

Let num = Vowels.count;

Print (num)

Empty sentence

Print (Numbers.isempty)

Print (Emptyarray.isempty)

Get element

Print (vowels[2])//take care not to make an array out of bounds error

Gets the first element and the last element, and returns the selectable

Let first_vowels = Vowels.first;

Print (First_vowels)

Let last_vowels = Vowels.last;

Print (Last_vowels)

Get minimum value, maximum value

Let min_numbers = Numbers.min ();

Print (min_numbers)

Let Max_vowels = Vowels.max ();

Print (Max_vowels)

Scope of Use

Let numbersss = numbers[2..<4];

Print (NUMBERSSS)

Let Vumberss = Numbers[2..<numbers.count]

Print (VUMBERSS)

Contains

Vowels.contains ("a")

Vowels.contains ("B")

Let letter = "a";

If Vowels.contains (letter) {

Print ("\ (letter) in vowel")

}else{

Print ("\ (letter) not in vowel")

}

Get index, return value is selectable

If Let index = Vowels.index (of: "C") {

Print ("C ise a vowel in position \ (Index + 1)")

}else{

Print ("C is not a vowel")

}

Traverse

For index in 0..<numbers.count {

Print (Numbers[index])

}

For number in numbers {

Print (number)

}

for (index, vowel) in vowels.enumerated () {

Iterate over arrays so and elements

Print ("\ (index) + 1: \ (vowel))")

}

Comparison

Let onetofive = [1,2,3,4,5,6];

if onetofive = = Numbers {

Print (True)

}

Before Swift 3.0, arrays are ordered data sets, and Swift 3.0 is unordered

var courses = ["A", "B", "C"]

adding elements

Courses.append ("D");

Print (courses)

Array constants. Arrays defined with let no content can be changed

Courses + = ["E"]

Print (courses)

Courses + = ["F"]

Print (courses)

+ = must be followed by the previous type

Two arrays added

Courses = courses + ["H", "I"];

Print (courses)

Insert

Courses.insert ("W", at:1)

Print (courses)

Delete

Courses.removelast ()

Print (courses)

Courses.removefirst ()

Print (courses)

Courses.remove (at:1)

Print (courses)

Interval Delete

Courses.removesubrange (0..<2)

Print (courses)

modifying elements

Courses[0] = "Z"

Print (courses)

Scope modification

COURSES[1...3] = ["Q", "W", "E"];

Print (courses)

COURSES[0...3] = ["W"]

Print (courses)

Two-dimensional arrays

var board = [[1024,16,2,0], [256,4,2,0], [64,2,0,0], [2,0,0,0]]

var board:[[int]] = [[1024,16,2,0], [256,4,2,0], [64,2,0,0], [2,0,0,0]]

var Board:[array<int>] = = [[1024,16,2,0], [256,4,2,0], [64,2,0,0], [2,0,0,0]]

var board:array<[int]> = [[1024,16,2,0], [256,4,2,0], [64,2,0,0], [2,0,0,0]]

var board:array<array<int>> = [[1024,16,2,0], [256,4,2,0], [64,2,0,0], [2,0,0,0]]

Two-dimensional array get elements

BOARD[0]

BOARD[0][0]

Print (Board[0])

Print (Board[0][0])

Get information about two dimensions of a two-dimensional array

Board.count

Board[0].count

A two-dimensional array in swift, with a different number of elements per dimension

Board[0].append (0)

Print (board)

The element added to the first dimension of a two-dimensional array is an array

Board.append ([0,0,0,0])

Print (board)

board + = [[0,0,0,0]]

Print (board)

Last word Nsarray is a class array is a struct

Additional setup after loading the view, typically from a nib.

}

Override Func didreceivememorywarning () {

Super.didreceivememorywarning ()

Dispose of any resources the can be recreated.

}

}

Swift Development Array Details use