sg300 52

[52 Effective ways to write high-quality iOS code] (iii) messages and run-timeReference book: "Effective Objective-c 2.0", "English" Matt GallowaySneak Peek11. Understanding the role of objc_msgsend12. Understanding the message forwarding mechanism13. Debug "black Box Method" with "Method leveling technology"14. Understanding the purpose of "class object"Directory 52 effective ways to write high-qu

Original Address: http://www.cnblogs.com/Alandre/ (mud and brick pulp carpenter), need to reprint, keep under! ThanksAlthough the world was full of suffering, it was full also of the overcoming of it. -hellen KellerI believe that I can read it, I believe I could write it, and I started to write it. In fact, it's simple.-Sediment brick and mortar carpenterWritten in the FontThree pieces[52-3]:52.suggestion:u

Recommendation 52: Timely release of resourcesThe garbage collection mechanism automatically reclaims resources for us (the garbage collector calls finalizers automatically), so why should we voluntarily release resources?Private void Buttonopen_click (objectnew FileStream (@ "c:\test.txt " , FileMode.Open); } Private void Buttongc_click (object Sender,eventargs e) {System.GC.Collect (); }This is an example of a WinForm form program in wh

Brief introduction:Recently the company project close, you can have time to read the book. "52 Effective ways to write high-quality iOS and OS X code" this book explains many of the skills and specifications of iOS development, highly recommended!Here are the notes that you took when reading your book, as usual, first on the list:Directory:Chapter One: Familiarity with objective-cChapter II: Object, Message, RuntimeChapter III: interface and API desig

Time: 2016-03-11-16:52:26 Title Number: POJ 1887 testing the CATCHER The main idea: a missile interception system that can intercept all missiles with a high altitude of less than the previous missile (the first missile will intercept), give some of the missiles, and ask how many missiles can be intercepted. Input: Several sets of data, each set of data ending with-1, if a set of data begins with 1, which represents the end of the in

these should contain a single integer, denoting the minimal amount of fuel For Victor to finish the travel.Sample Input13 21 2 21 3 3Sample Output10SourceBestcoder Round #52 (Div.2)Topic meaning. All the cities have to go once, the last point 1, to find the most good oil quantity.#include #include #include #include #include #include #include #include #include #pragma COMMENT (linker, "/stack:102400000,102400000")#define PI ACOs ( -1.0)#define EPS 1e-

Light reading is not enough, but also with the outside world more contact, due to the work of the relationship, 5.5 days a week class, really let me tired! So I decided to look at the film to increase their experience, it sounds very nonsense hum, yes!So how many parts do you want to see in a year? -52 parts, one per week.Where do these movies go from, there's a nice place, watercress movie Top250http://movie.douban.com/top250 same as my other book pl

52 carcinogenic plants that cannot be placed indoors Chrysanthemum is closely related to human health: "authentic herbs" and "air purification. Chrysanthemum is bitter, sweet, flat, and non-toxic. Its main components include chrysanthemum, smoothly, amino acid, cholesterol, soda, flavonoids and so on. It also contains vitamin A and B. Chrysanthemum can be used as a drink to relieve heat and reduce heat and drive the wind. The medicine has the

Nine Chapters count judges Net-original websitehttp://www.jiuzhang.com/problem/52/TopicsCount the number K (0Online testhttp://lintcode.com/problem/digit-counts/AnswerThe solution to the problem lies in the skillful use of recursive thinking and preprocessing.Preprocessing: F[0] represents the number of numbers k in 0-9. (definitely =1) f[1] represents the number of numbers k in 00-99. F[2] represents the number of numbers k in 000-999....Existing for

: bulk_quote2 () =default; Direct initialization of Bulk_quote2 (const string book, double Price, size_t qty, double disc): disc_quote (book, Price, Qty , disc) {} double Net_price (size_t) const override; Overwrite pure virtual function};Some people think that to be true, so speak straight. The result is to go straight to offend. In fact a blunder. Chinese people write "true" word, is "straight" the following two points. That is to say, some truth, blunt, also want to keep

::nothrow_t NT)Throw(STD:: Bad_alloc) {return::operator New(SIZE,NT);}Static void operator Delete(void* Pmemory,Const STD::nothrow_t)Throw() {::operator Delete(pmemory);} };classWidgets: Publicstandardnewdeleteforms{ Public://Make these forms visible usingStandardnewdeleteforms::operator New;usingStandardnewdeleteforms::operator Delete;//Add your own defined Static void*operator New(STD:: size_t size,STD::ostream LogStream)Throw(STD:; bad_alloc);Static void operatorDetele (S

/* XCode LLVM XXX - Preprocessing中Debug会添加 DEBUG=1 标志 */#ifdef DEBUG#define NSLog(FORMAT, ...) fprintf(stderr,"%s:%d\t%s\n",[[[NSString stringWithUTF8String:__FILE__] lastPathComponent] UTF8String], __LINE__, [[NSString stringWithFormat:FORMAT, ##__VA_ARGS__] UTF8String]);#else#define NSLog(FORMAT, ...) nil#endifPaste the above code into the projectname-prefix.pch file.When debugging, the output (format: File name: line number) of the log.When the release is released, the log output is turned of

to find the PID of a process:To generate a snapshot: Five Summary (1) How to solve the deadlock problem 1) Try to avoid unnecessary synchronized keywords.2) You can replace the Synchronized keyword with another method, such as a flag that is not variable.3) Ensure that the synchronized code block is concise. (2) Suggestions for creating threads Based on the comparison of two methods of creating threads, it is concluded that multithreading is better created using the method of implementing the

title: Given an array of a[0,1,2...n-1], build an array b[0,1,2,... N-1], so that the element in B is b[i]=a[0]*a[1]*...*a[i-1]*a[i+1]*...*a[n-1], you cannot use division. Solution Ideas:Through the positive and negative two times to seek b[i];Zheng: b[i]=a[0]* ... A[I-1];Inverse: temp = b[n]* ... B[I+1];Finally, the results can be obtained by b[i]*temp.Take a[0,1,2,3,4], b[0,1,2,3,4] For example:Step Analysis:First step: b[0] = 1;Step two: b[1] = b[0] * A[0] = a[0]Step three: b[2] = b[1] * A[1]

current share of 30.74%, its share of the last month was 31.58%, the chain shrank 0.84%, the decline does not diminish.Then the 3rd, 4, win 10 and win 8, the share of the same, in turn, 5.8%, 5.18%. It is worth mentioning that the share of Win 10 is on the rise, a 0.47% increase from last month. In addition, Mac OS ranked 5th, with a small share rise to 0.87%. Compared with the previous month, the above five operating system market share ranked order, no change.650) this.width=650; "src=" Http:

Learn Swift from scratch (Day 52)-Cocoa error handling modeThe Swift error handling mode is different in Swift1.x and Swift 2.0. The error handling mode of Swift 1.x Code adopts the Cocoa framework error handling mode. Currently, Objective-C still adopts this mode, while the do-try-catch error processing mode is adopted after Swift2.0. The following sample code reads a string from the file to the memory. If you use the Swift 1.x error handling mode, t

)self.driver.find_element_by_id ("Signin"). Click ()Time.sleep (3)def is_login_sucess (self):U "" to determine whether to get to the login account name 'TryText = self.driver.find_element_by_id ("Lnk_current_user"). TextPrint textReturn TrueExceptReturn Falsedef test_01 (self):U "Login Case Reference: Account number, password set"Self.login (U "Shanghai-Yo", U "xxxx") # Invoke Login method# Judging Resultsresult = Self.is_login_sucess ()Self.asserttrue (Result)def test_02 (self):U "Login Case Re

GetView () function, which can be used directlyBar.Setlistnavigationcallbacks(Myadapter, this);}@Override//list triggers the callback function, which is the example, simply log.public boolean onnavigationitemselected (int itemposition, long itemId){LOG.D ("Listmode", "List Select position" + itemposition + "itemId" + itemId);return false;}}The example code covered in this blog post can be downloaded in Pro Android Learning: Actionbar Small example.RELATED Links: My Android development related a

interfaces for an object so that it can communicate related events to other objects.Define the interfaces that the delegate object should support as protocols, and define the events that may need to be handled as methods in the protocol.When an object needs to be from another object or data, the delegate mode can be used, which can be referred to as the "Data Source Protocol (protocol)" in this mode.If necessary, a struct containing a bit segment can be implemented to cache the information that

); } cgpathaddlinetopoint (Linepath, null, Contactx, contacty);} else {if (_strokeend! = 1.F _strokeend! = 0.f) {cgpathmovetopoint (Linepath, NULL, _ Origin.x, _ORIGIN.Y); Cgpathaddlinetopoint (Linepath, null, Contactx, contacty);}} [Self setpath:linepath oncontext:ctx color: [uicolor colorwithred: 66/255.F Green: 1.f Blue: 66/ 255.f Alpha: 1.f]. Cgcolor]; Cgpathrelease (Linepath); We reduce the amount of code by encapsulating code that adds cgpathref and sets parameters such as l