appleseed primitives

fengsh998 Original address:http://blog.csdn.net/fengsh998/article/details/28904115 Reprint Please indicate the source Suppose that the article is helpful to you. Please support me by leaving a message or following the public account fengsh998 , thank you. Optional type, implicitly selectable typeIn Swift. The source of an optional type is an enumerated type. There are two types of none and some. In fact, the so-called nil is optional.none, non-nil is optional.some, and then through the Some (T

together to prevent the loss of values. These values are optional. An optional value can contain a value or contain a nil to specify that the value does not already exist. Write a question mark "?" After the type indicates that the value is optional.var optionalstring:string? = "Hello" optionalstring = = Nilvar optionalname:string? = "John appleseed" var greeting = "Hello!" If let name = optionalname { greeting = "Hello, \ (name)"}NotePracticeCha

> Amscores + = 3 } else { teamscores + = 1 }}teamscoreIn an if statement, the condition must be a Boolean expression, which means that if score {...} is wrong and cannot be suppressed compared to 0.You can use if and let together to prevent the loss of values. These values are optional. An optional value can contain a value or contain a nil to specify that the value does not already exist. Write a question mark "?" After the type indicates that the value is optional.var opt

to the constant of the let face so that the value can be used in the code block. another way to process an optional value is by using the ?? operator to provide a default value. If the optional values are missing , you can replace them with the default values . Let nickname: String? = nil; Let fullName: String = "John Appleseed"; Let informalgreetin = "Hi \(nickname ?? fullName) "; Switch supports any type of data and various compar

for Mac;* Ie hacks uses independent files;* Quickly create a template;* A small amount of comments/instance demos can save time to understand. 12. content with style framework The next logical step is to extend this to the css framework, allowing you to quickly develop websites using components that are written and tested. What is actually needed is to get a set of naming conventions and a flexible basic template... 13. Boilerplate css framework 14. ESWAT web project framework ESWAT is reorgani

emptyarray = string [] () Let emptydictionary = dictionary If the type information can be inferred, you can use [] and [:] to create an empty array and an empty dictionary, just like when you declare variables or pass parameters to the function. Shoppinglist = [] Control Flow 1. if and switch are used to perform conditional operations. For-in, for, while, and do-while are used to loop. (enclose conditions and loop variable parentheses can be omitted, but the braces in the statement body are r

• Mymagicbox (https://github.com/yaoyansi/mymagicbox)Role: OwnerMiscellaneous projects for exercises. • Maya2renderer (https://github.com/maya2renderer/maya2renderer)Role: OwnerBased on liquidmaya, this project aims to provide a framework to translate Maya data to a Renderer. It supports 3 delight, elvishray and Appleseed now. • Mayaexporter (http://code.google.com/p/mayaexporter)Role: OwnerRefactored an exporter Based on colladamaya. • Gpexporter (h

realistic. Listing 12.1 shows the implementation of the original version. listing 12.1 A simple contact list that uses false data #import "ViewController.h" #import @interface Viewcontroller () @property (nonatomic, strong) Nsarray *items; @property ( Nonatomic, weak) iboutlet UITableView *tableview; @end @implementation viewcontroller-(NSString *) randomName{NSArray *f Irst = @[@ "Alice" @ "Bob" @ "Bill" @ "Charles" @ "Dan" @ "Dave" @ "Ethan" @ "Frank"]; Nsarray *last = @[@ "

{ teamScores += 1 }}teamScore InIfStatement, the condition must be a Boolean expression, which meansIf score {...}It is incorrect and cannot be implicitly compared with 0. You can use it togetherIfAndLetTo prevent value loss. These values are optional. An optional value can contain a value orNilThe specified value does not exist. Write a question mark "? "After the type, the value is optional. var optionalString: String? = "Hello"optionalString == nilvar optionalName: String? = "John

? = "Hello" Optionalstring = nil Var optionalname: string? = "John appleseed" Var grespon= "hello! " If let name = optionalname { Grespon= "hello \ (name )" } Flexible switch Switch in swift supports various comparison operations: 1 2 3 4 5 6 7 8 9 10 11 Let vegetable = "red pepper" Switch vegetable { Case "celery ": Let vegetablecomment = "add some raisins and make ants on a log ." Case "cucumber" "watercress ": Let vegetablecomment = "that wocould m

to quickly develop websites using components that are written and tested. What is actually needed is to get a set of naming conventions and a flexible basic template...13. Boilerplate CSS Framework 14. ESWAT Web Project Framework ESWAT is reorganizing. If you are targeting my website framework, you can download it here. Maybe you want to see my other projects gmachina and AppleSeed.15. Tripoli CSS Framework Tripoli is a general css specification fo

> 50{Teamscore + = 3}else {Teamscore + = 1}}Print (Teamscore)In a if statement, the conditional must was a Boolean expression---this means that code such as if score {...} is an Erro R, not a implicit comparison to zero.You can use the IF and let together ro work with the values that might is missing. These values are represented as optionals. An optional value either contains a value, or contains nil to indicte, a value a is missing. Write a question mark (?) after the type of a value to mark

= @[@ "appleseed", @ "Bandicoot", @ "Caravan", @ "dabble", @ "Ernest", @ "Fortune"]; Nsuinteger index1 = (rand ()/(double) int_max) * [First Count]; Nsuinteger index2 = (rand ()/(double) int_max) * [last count]; return [NSString stringwithformat:@ "%@%@", First[index1], Last[index2]]; } -(NSString *) Randomavatar { Nsarray *images = @[@ "Snowman", @ "Igloo", @ "Cone", @ "Spaceship", @ "Anchor", @ "Key"];

as follows:var optionalname:string? {get {If Checktouchid () {Print ("Get Optionalname")Return "John Appleseed"} else {return Nil}}}var greeting = "Hello!"If optionalname! = Nil {Greeting = "Hello, \ (optionalname)"}In this code, because Optionalname's getter method is declared, the IF optionalname! = Nil and greeting = "Hello, \ (optionalname)" There are getter methods called Optionalname, that is, the Getter method executes 2 times, so there are so

A protocol defines a set of standards for methods and attributes without specific implementation. The Protocol can be implemented (or followed) by classes and struct ). protocol SomeProtocol { // protocoldefinition goes here } struct SomeStructure: FirstProtocol, AnotherProtocol {// structure definition goes here}class SomeClass: SomeSuperclass, FirstProtocol, AnotherProtocol { // class definitiongoeshere } Attribute 1. Set and get accessors protocol SomeProtoc

optionalname:string?= "John Appleseed"var gretting = "Hello!"If let name = optionalname {gretting = "Hello, \ (name)"}Flexible switchThe switch in Swift supports a wide variety of operations:Let vegetable = "red pepper"Switch Vegetable {Case "Celery":Let vegetablecomment = "Add some raisins and make ants on a log."Case "cucumber", "watercress":Let vegetablecomment = "so would make a good tea sandwich."Case Let X where X.hassuffix ("Pepper"):Let veget

Control flowUse if and switch as conditional controls. Use For-in, for, while, and do-while as loops. The parentheses are not required, but the main braces are required.Let individualscores = [75, 43, 103, 87, 12]var Teamscore = 0For score in individualscores{If score > 50{Teamscore + = 3}else{Teamscore + = 1}}TeamscoreIn an if statement, the condition must be a Boolean expression, which means that if score {...} is wrong and cannot be suppressed compared to 0.You can use if and let together to