repeater trap

widen the line segment (the Code allows the line segment to be extended by 1e-6 on both sides) and change it to a standard intersection. Another scenario is: When the line segments of the two endpoints are collocated, the problem also occurs. For example, it should have been closed, but it may be converted into a path because it determines whether to move forward based on the standard intersection of a line segment. The solution is that the points on other line segments at the endpoint after t

Copy codeThe Code is as follows: var a = parseInt ("09"), B = Number ("09 "); Many people think that the values of a and B are numbers 9, but they are not. ParseInt is mainly used to convert a string to an integer, or to convert a decimal point to an integer. Generally, we only use its first parameter. But in fact, it has two parameters:ParseInt (string, radix) ParseInt is converted according to the hexadecimal format specified by radix. For example:Copy codeThe Code is as follows: alert (parseI

"Some places have rivers and lakes", and the server market is like a "river and lake", which has caused many purchasers to be caught off guard. It can be said that the current quality of sales personnel is uneven, manufacturers of various fraud techniques frequently, accidentally will be affected. This requires the procurement staff to have a strong degree of recognition, in order to purchase a satisfactory server for the enterprise. Fortunately, there are also "Swordsman heroes" in the areas wh

rest of the code in several windows, find the Problem window in the window design interface, set the formwindowstate.maximizedThe normally displayed window here is the default normal value.After you restore the window's maximized to normal, the problem is resolved.It can only be guessed that the property value of WindowState will trigger the recalculation of the window size when it is modified, and the correct result can be obtained by modifying this value when needed.The crux of the problem is

This trap comes from a requirement: the need to process the data asynchronously in the background, after processing the event that triggers the completion of processing, presumably this is written:New+ = data_loaded; Action { dalhelper.fill (data) ; NULL null);Very simple code, traps are in it. If Dalhelper.fill (data) throws an exception, then the data. Raiseeventloaded () will not execute and depend on data. The code for the loaded event is al

-circuit rule completely fails, overloading changing the semantics of its original short-circuit if(Func (t0) func (T1))//equivalent to function call operator (func (t0), func (T1)){cout"result:true"Endl; } Else{cout"Result:false"Endl; } coutEndl; //Output: (Analysis: Equivalent to a function call, enter the function body, the value of the parameter must be calculated)//int func (Test i): i.value () = 1//int func (Test i): i.value () = 0//result:true//the short-circuit law completely fai

done another operation on I, such as this:Each connection pops up with 555. The actual i is done as a global variable (JS no block scope, so the for loop i is not a local variable, but a global variable), and I think, if I let the memory back, it will be an error, the result I tried not to recycle, probably because of the closure of the relationship. In fact, even if the browser is a global function is a closure, specifically why I understand here, we can find a closure of the relevant informat

enum drink , It turns out to be an int, and of course the type mismatch also warns, but there's no way, that's where the flaw lies. total+=price (d); NBSP;} va_end (AP); return total; }NBSP; The problem is: at compile time, warning appears: ' Drink ' is promoted to (promoted to) ' int ' when passed through ' ... ' (so you should pass ' int ' not ' drink ' to ' V A_arg ')If this code was reached, the program would abort.And this program does not print out the total price, run crashe

PHP is easy to ignore and error trap numbers are compared with strings. 0 returns true if it is compared with any character leading by a non-number (or character that cannot be converted to a number) (operator. the reason is that when comparing numbers with strings, first try to convert strings 0 returns true if it is compared with any character leading by a non-digit character (or character that cannot be converted to a number) (operator =. The reaso

. Width*desc. height*4); -Initrender (Desc. Width, Desc. Height,2, errormessage);//Initializing render parameters - if(NULL = =s_hthread) - { -unsigned threadID;//Thread ID -S_hthread = (HANDLE) _beginthreadex (NULL,0, Sfprefreshthread, NULL,0, threadid);//new thread control rendering frequency in } - } to //Control Refresh Frequency + if(S_refreshflag S_isinitrender) - { the if( ! Ren

copied the paste from the Pycharm to Notepad, also show a more than one quotation mark, and copy back the Chinese quotation marks and disappeared! Try to copy the following text into the Pycharm bar:I am the Chinese quotation mark "" "" "" "" hoho~~~I am the English quotation mark "" "" "" "hoho~~~Then copy it from Pycharm to Notepad:Oh, by this quote toss for half an hour, Chinese quotation marks are not pycharm intelligent filter, but is hidden! And then silently waiting for the emergence of

Function Test (){ This. Name = 'test '; VaR name = 2; This. Show = function (){ Alert (name ); Alert (this. Name); // display name } } VaR test = new test (); // create an object through the constructor Test. Show (); // output 2 and 'test', indicating that this must be added when the object method accesses its attributes. Function Test2 (){This. Name = 'test2 ';This. Show = function (){Alert (name );Alert (this. Name );}}Test (); // directly call test ();VaR Test2 = new Test2 ();Test2.show

problem comes from today's Bug report: #63281 The reason is the difference between bindParam and bindValue. bindParam requires that the second parameter be a reference variable ). Let's split the foreach of the above code, that is, the foreach: foreach( $bind_params as $key => $value ){ $statement->bindParam($key, $value); } Equivalent: // The first cycle $ Value = $ bind_params [": username"]; $ Statement-> bindParam (": username", $ value); // at this time, userna

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project" in Jenkins.In the project, add the "build step" in the following order:Execute ShellCommandandroidupdateproject-p.--targetandroid-19Invoke AntTargetscleandebugfindbugslintSee, the FindBugs command is the ant build task we just configured.The lint command requires Jenkins to install the response plugin, which is not mentioned here.Resources:Http://www.cnblogs.com/ifantastic/p/3981295.htmlHttps://www.digitalocean.com/community/tutorials/how-to-build-android-apps-with-jenkinsHttp://stacko

Copy codeThe Code is as follows:Var a = parseInt ("09"), B = Number ("09 "); Many people think that the values of a and B are numbers 9, but they are not.ParseInt is mainly used to convert a string to an integer, or to convert a decimal point to an integer. Generally, we only use its first parameter. But in fact, it has two parameters:ParseInt (string, radix)ParseInt is converted according to the hexadecimal format specified by radix. For example:Copy codeThe Code is as follows:Alert (parseInt (

Java basic knowledge trap (2)This article is published on my blog. The last time I talked about some string-related knowledge, it was quite basic. This time I also talked about object address issues, such as passing parameters. First read the following code: public void changeInt (int a) {a = 3;} int a = 1; changeInt (a); System. out. println (a); I believe this beginner knows the result and the value is passed. Let's take a look at the process: publi

Java basic knowledge trap (7)The relationship between HashSet and HashMap was discussed last time. The HashMap contains the following internal sentence: static final float DEFAULT_LOAD_FACTOR = 0.75f; this sentence indicates a constant, the function is to re-construct an array of 2 times the size of the container when the number of containers reaches 0.75%. If the two are collections, let's look at other collection classes today, such as ArrayList, Ve

;ImportOrg.springframework.ui.ModelMap;Importorg.springframework.web.bind.annotation.RequestMapping;/*** Created by Administrator on 14-4-9. * *@authorleizhimin 14-4-9 Morning 10:55*/@Controller @requestmapping ("/demo/lsh/ch5") @Scope ("Prototype") Public classMultviewcontroller {Private Static intst = 0;//of Static Private intindex = 0;//non-static@RequestMapping ("/show") PublicString toshow (Modelmap model) {User User=NewUser (); User.setusername ("Testuname"); User.setage ("23"); Mod

the code. To avoid this problem, we can use the hasOwnProperty () method of the object to avoid this problem, and the hasOwnProperty () method returns True if the property or method of the object is non-inherited. That is, the check here does not involve properties and methods inherited from other objects, only properties that are created directly in the particular object itself.Case THREE:Copy CodeThe code is as follows:Vararray = ["admin", "manager", "DB"];Array.prototype.name= "Zhangshan";Fo