IPND, stage5, iOS

Apple invented a language called swift in 2014. So it’s a pretty new one and includes many good merits from other languages. Basically, its grammer is very similar to JavaScript. The nice part is swift introduces “struc“ that groups relevant data. And its IDE Xcode provide immediate feedback.

I am not interesting in developing a game now. But it’s good to know it.

learning sources:

https://developer.apple.com/support/development/

https://developer.apple.com/library/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/

support both inferred typing and explicit typing

Once the type is declared or set, it can’t change.

var mylove = “w” //inferred typing, will guess it as string

var mylove: Character =”w”//explicit typing

var islove: Bool = true

var secretNumber = 7

var price: Double = 2.50

let pi = 3.14 //constant

Naming

keyword:

var, let, class, import, private, operator.

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/Swift_Programming_Language/LexicalStructure.html#//apple_ref/doc/uid/TP40014097-CH30-ID413

Hungarian Notation:

• `intNumberOfLives
• countNumberOfLives
• sumTotalScore

Camel Casing:

• totalCumulativeScore
• secondsSinceLastUpdate
• minutesTillLaunch

Naming constant:

• PointsPerLife
• DefaultGreeting
• MaxLength
• POINTS_PER_LIFE
• DEFAULT_GREETING
• MAX_LENGTH

name for a struct a capital letter:

struct Student {
    let name: String
    var age: Int
    var school: String
}

var ayush = Student(name: "Ayush Saraswat", age: 19, school: "Udacity")

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