Swift basics and practices

Swift basics and practices

1. Same as before

2. Code

1 // 2 // ViewController. swift 3 // SwitfLesson_exam 4 // 5 // Created by Xue yulun on 14-10-7. 6 // Copyright (c) 2014 Dylan. all rights reserved. 7 // 8 9 import UIKit 10 11 class ViewController: UIViewController {12 13 override func viewDidLoad () {14 super. viewDidLoad () 15 16 // 1. 17 // Change Two temper 18 // initialization of Two tuples 19 var a = "Alice" 20 var B = "Dylan" 21 var myType = (a, B) 22 23 var name: Str Ing 24 var family: String 25 (name, family) = ("Alice", "Dylan") 26 27 // test func change 28 swap (& a, with: & B) 29 println (a) 30 println (B) 31 32 // 2. 33 // print String 34 // test func flexString 35 println (flexStrings (s1: "Alice", s2: "Dylan") 36 37 // 3. 38 // sumAny 39 // test func sumAny 40 println (sumAny (1, 2, 3) 41 42 // 4. 43 // countFrom 44 // test func countFrom 45 countFrom (from: 1, To: 5) 46} 47 48/** 49 1. fun change 50 swap the value of two arbitrary objects 51 */52 func swap <T> (inout a: T, inout with B: T) {53 (a, B) = (B, a) 54} 55 56/** 57 2. func flexStrings 58 output String 59 */60 func flexStrings (s1: String = "", s2: String = "")-> String {61 return s1 + s2 = ""? "None": s1 + s2 62} 63 64/** 65 3. func sumAny 66 */67 func sumAny (anys: Any ...) -> String {68 return String (69 (anys. map ({item in 70 switch item {71 case "" as String, 0 as Int: 72 return-10 73 case let s as String where s. toInt ()> 0: 74 return s. toInt ()! 75 case is Int: 76 return item as Int 77 default: 78 return 0 79} 80}) as [Int]). reduce (0, combine: {81 $0 + $1 82}) 83) 84} 85 86/** 87 4. func countFrom 88 */89 func countFrom (# from: Int, to: Int) {90 println (from) 91 if from <to {92 countFrom (from: from + 1, to: to) 93} 94} 95 96 override func didReceiveMemoryWarning () {97 super. didReceiveMemoryWarning () 98 // Dispose of any resources that can be recreated. 99} 100 101 102}

 

In the process of legitimate defense, why does basic training fail to be used in actual practice? What training methods are most effective in practice?

I also had this experience, so I went to learn karate, and now I am a normal student's teacher. Simple suggestions.
First, we recommend that you do not attach your money to those who hold weapons (especially knives and knives). As the saying goes, the swords are heartless, in the chaos, it's a big headache.
If you are dealing with people without weapons, analyze them based on your situation.

1. your weight is too light, but you didn't say your age or the age of the other party, you can only say that you are under weight, your fist, leg force, the kinetic energy is still small, therefore, it is not painful to be beaten. In addition, the body is thin, the muscles are insufficient, and the combat capability is also weak. Do not say that you can dodge. In normal times, unlike in movies, most of the fights are fight and fight, it is inevitable that you are affected.

2. Always practice routines and tricks at home, but it is only a small part of exercise. The key is to improve your overall quality.
○ Recommendation: jogging, re-running, horizontal bars, dumbbells, push-ups, sit-ups, etc. If you have the conditions, you 'd better go to the gym and ask a professional coach to take the exercises. You are only 177CM, which is indeed too thin. ○ I personally think it is helpful for practice: select a dense forest, and run in the wild where the weather is poor. When running, escape the branches and troughs, from jogging to fast running, your response speed will be significantly improved.

3. You are in a mess when it comes to practice. This is the case for anyone at first.
There are three methods:
(1) practice the tricks you have practiced thoroughly. Please note that it is thorough, that is, it has formed a conditioned reflection, just like a table tennis player, you don't have to think about it. You can use a reasonable method to go back. This kind of practice is not a thousand times, but a basic skill that you need to practice at any time and place, even if you have become a peerless expert. We recommend that you buy Professional Books, discs, or go to a professional martial arts class and select a kung fu exercise that you can accept. Recommended: boxing, Sanda, and karate. These are all martial arts routines that can be achieved immediately.

(2) station pile. Ancient language: not martial arts, more gas up, once more skilled, standing as a stiff monument, the beginning is vacated. Full root. It's what you say. Standing pile is to make the movement no longer breathless. Strong. It is as stable as Mount. Combine the power frame, waist, and horse. Only by making a fist can we have the destructive power. It is like a cannon. When the shells go out, the gunshots must be solid. Otherwise, the shells will be dispersed.

(3) Split moves. This requires sparring. No, you can find a friend of your own and let him attack him as you like. At the beginning, you start to slow down a single trick, that is, you can block or dodge it in a reasonable way, and then speed up the opponent's opening (picking) speed. If you have completed the above training, you can combine them for quick start. Because your real opponent has not been professionally trained, it is more practical to find friends who have not been trained to beat you.

Through the above exercises, you can be able to easily find and find your opponent. in actual combat situations, do not take the first action to take the first action, on the one hand, warm up for yourself, on the other hand, it is to dampen your opponent's confidence and boost your morale. After feeling that you have completely refused to attack him, you can effectively fight back, do not round the arm side and other fight tactics, these moves are slow, many flaws, can scare people, the effect is too small. These are the experiences that need to be accumulated in practice. I have only mentioned a small part, and most of them need to be realized by myself.

In general, you still have little experience in practice. This is the path that new people who are just involved in practice will surely go through. Isn't Bruce Lee also known as a generation of masters? You have a heart that punishes evil and promotes good deeds. If you do not fear the courage of the wicked to resist, you have already laid the foundation for your martial arts journey. As long as you can persist and practice hard, keep your confidence in defeating all evil, and you will be able to succeed. Don't rob others of the money.
I hope this will help you. Finally, let's say, you are too thin to exercise. The height should be at least 130.

Basic Learning of the apple language swift0

If there is no foundation at all, we do not recommend learning from swift. Currently, there are not many swift documents and there are fewer posts. The posts on the Internet are either translated into official manuals or experienced. For example, some comparisons with object-c are of little significance to new users.
In addition, there are still a lot of imperfections in xcode 6 beta versions. There are bugs in ide, and the language itself is not perfect. There will still be changes compared with the official version. You can use it to learn it now, maybe some knowledge or habits will be adjusted soon. You may not know the bug.