learning swift pdf

(Setm) Setn==Setm var setsub1:set1,2,3] //determines whether a subset or parent setSetsub1.issubset (OF:SETN) setn.issuperset (OF:SETSUB1)//determine if a true subset or true parent setSetsub1.isstrictsubset (OF:SETN) setn.isstrictsuperset (OF:SETSUB1) Traversal of a collection var setsub1:set1 , 2 , Span style= "COLOR: #800080" >3 ] for Item in setsub1{print (item)} for item in Setsub1.enumerated () {print (item)} for (Index, item) in setsub1.enumerated () {print (

class, you must precede the method with the override*/classperson:nsobject {var age:int=0 //Override: Override if one of the methods written is an override to the method of the parent class, you must precede the method with the override OverrideFunc SetValue (_ value:any?, Forundefinedkey Key:string) {}}let P=person ()//p.age =P.setvaluesforkeys ([" age": -,"name":" why"]) Print (p.age) Import UIKitclassPerson:nsobject {//class : Declare the keyword of a class, declare a class, yo

Ios learning: Share on Weibo, facebook, and twitter in swift, Enabling the sharing feature in swift is so simple. 1. First, you must Import Social 2. Under the share button event Var controller: SLComposeViewController = SLComposeViewController (forServiceType: SLServiceTypeSinaWeibo) controller. setInitialText ("come to

A class can inherit another class's methods, properties, and other characteristics, when a class inherits from another class, the inheriting class is called a subclass, the inherited class is called the parent class, or (superclass), in Swift, inheritance is a basic feature that distinguishes [class] and other typesIn Swift, classes can invoke and access superclass methods, properties, and subscripts, and c

switch code block is immediately interrupted and jumps to the first line of code after the switch code block ends. This feature can be used to match or omit one or more branches. Because Swift needs to include all branches and does not allow empty branches, it is sometimes necessary to deliberately match or omit a branch in order to make the intent more obvious, and when you want to ignore a branch, you can write a break statement within that branch.

inference statement of the while loop body, and then decides whether the next iteration of the loop can continue to run. Attention: Assuming that the break statement above does not use the gameloop tag, it interrupts the switch code block rather than the while loop body. Using the Gameloop tag is a clear indication of which block of code the break is trying to interrupt. At the same time, note that it is not strictly necessary to use the Gameloop tag when calli

This book is comprehensive and detailed, not only for those who do not have the technology foundation of Eclipse platform, but also for those who know the relevant technology and have a certain plug-in development ability. "Eclipse plug-in development learning notes" PDF content free download Links:http://download.csdn.net/detail/tan3739/8771149Source code free download Link:http://download.csdn.net/detai

Base operatorMost of Swift's operators are the same as C and OC, and are divided into two yuan, which only records some of the nature or wording of Swift.Assignment operator (=)When the right side of the equals sign is a tuple with multiple values, its member values can be decomposed and assigned to constants or variables, respectively:Let (x, y) = (12)// x are equal to 1, and y are equal to 2Unlike C, OC, the assignment operator itself does not return a value, so the following is an incorrect

Learning Swift from scratch (Day60)-Core Foundation framework The Core Foundation framework is a set of Apis developed by Apple from the Foundation framework. The programming interfaces are for C-language APIs. Although it is troublesome to call this C-language API in Swift, sometimes it is very convenient to use the API of CoreFoundation framework during OS X an

characters similar to identifiers. Defined by the language itself. You can't use it for him. Unless you enclose it with an accent sign ('). Swift language Common keyword have the following 4 species. keyword related to the declaration: class , Deinit , enum and so on. break Span style= "font-family: Arial" >, case , continue expression and type keyword: as catch , dynamictype , false keyword used in a specific context

whether the given parameters match the criteria, return nil if it does not, and not create the object, reducing memory overhead!5. Construct the current object using ' Self.init ' only in the convenience constructor6. Constructors that do not have the CONVENIENCE keyword are responsible for creating the object, and vice versa, which is not responsible for the creation of the object itself.7. If you want to use the properties of the current object in the convenience constructor, be sure to follo

This article and we share the main is the swift in the access control related content, come together to see, hope to learn swift to you to help. Access control constrains the access to your other code source files and modules section. This feature allows you to hide your code implementation and specify a preferred interface through which the code can be accessed and used.class, structure, and enumeration ca

the function name, and Swift is written behind the parameter list with the arrow-----and the return type.Note Swift and Java have just one file and no need to write a function declaration.function definition:Func function name (parameter name 1: parameter type, parameter name 2: Parameter type ...) The return value type of the function, {???? function body???? return value}Call to function:Function name (a

script index of an integer is passed into a custom satellite script implementation, but the subscript index value may be too small or too large. You need to pass in a value to the function, but an illegal value may cause the function to not work correctly. An optional value is now nil, but a non-nil value is required for the subsequent code to run. Note: Assertions can cause your app to stop running, so you should design your code carefully so that illegal conditions do not appear.

model.Deeper in the brain.Fifth Evolutionary School: a natural learning algorithmDarwin's algorithmExploring: Using the dilemmaProgram of survival of the fittest lawWhat's the use of sex?Congenital and acquiredWhoever learns the fastest will win.Sixth Chapter Bayesian School: In the Church of BayeuxThe theorem governing the worldAll models are wrong, but some of them are useful.From "Eugene Onegin" to Siri.Everything's connected, but not directly rel

How to use Swift learning-enumerationUse syntax for enumerations:enum Someenumer The member value of the {// enumeration}Here is an example of the direction:enum direction { Case- up case-left Case Right }The following is an excerpt from Swift's Chinese translation teamNote: Unlike C and ObjectiveC, Swift's enumeration members are not assigned a default integer value when they are crea

Swift Basic Learning Chapter (i)The swift language is a new technology released by Apple in 2014 at the WWDC (Apple Developers Conference), which is used to write iOS and OS X apps and supports code previews; Chris Lattner has been leading the development of the SWIFT programming language since July 2010; Envi

In the tutorial before learning a two-dimensional array, the original inside a lot of knowledge points are not very understanding, and then after some information to find, basically understand thoroughly, do a summary of it.The usual, the first code:Class Array2dIn fact, in general, this custom class is very similar to the template class in C + +, for example, using T to represent arbitrary data types, but only in

: Network Disk DownloadContent Profile ...This book is intended for all readers interested in the practice and competition of machine learning and data mining, starting from scratch, based on the Python programming language, and gradually leading the reader to familiarize themselves with the most popular machine learning, data mining and natural language processing tools without involving a large number of

: Network Disk DownloadContent Profile ...This book is intended for all readers interested in the practice and competition of machine learning and data mining, starting from scratch, based on the Python programming language, and gradually leading the reader to familiarize themselves with the most popular machine learning, data mining and natural language processing tools without involving a large number of