skylanders traps

compared.Then look at the source of equals in the integer class: Public Boolean equals (Object obj) { ifinstanceof Integer) { return value = = ((Integer) obj). Intvalue (); } return false ; }Then look at the author's explanation in the original book:the "= =" Operation of the wrapper class (referred to as Integer, in contrast to int) does not automatically unpack without encountering arithmetic operations, and their equals () method does not handle the rel

32768, the highest bit is 1, and the integer variable is given a negative integer value; Conversely, when a negative integer is assigned to the unsigned variable, the resulting unsigned value is a value greater than 32768 (this assumes the int type is two bytes)The type conversion form of the C language can make people feel less sophisticated and less restrictive, because regardless of the value of the expression, the system automatically converts it to the left variable of the assignment opera

CStringA CSA;CStringA csc;CString CSB (L "131231111111");Csa. Format ("%s", CSB); Only outputs 1Csc. Format ("%s", CSB); Will output 131231111111printf ("%s\n", CSA. GetBuffer (0));printf ("%s\n", CSC. GetBuffer (0));The original intention is to output 131231111111, but "%s" will only output 1, because%s is encoded according to Ascill, and CSB is Unicode encoding, Unicode encoding format is a "1" followed by an 0x00, so for Ascill, the string is considered to be terminated .

elements remaining: 2Workaround:The reason is because you want to delete the element to move forward, and your I save the value is still back, so if I do not go backward, go forward one, you can delete the second position of the element is now ranked in the first position of the element.The core code after the change:for (int i=0;iSYSTEM.OUT.PRINTLN ("the element to be removed:" +list.get (i));List.remove (i);i--;}Results:Elements to be removed: aElements to be removed: bElements to be removed:

A question to be discussed in the group today, record it. The origin of the problem isVar_dump (MD5 (' 240610708 ') = = MD5 (' Qnkcdzo ')); TrueA string of two md5, compared with the comparison operator (= =), is actually equal.Output a value of two values, respectively:MD5 (' 240610708 ')//0e462097431906509019562988736854MD5 (' Qnkcdzo ')//0e830400451993494058024219903391Seeing the result, the first feeling is intval, so 0 = = 0 Returns True,Later, I was reminded that this was not the case.PHP

If the general rule is changed, it will die. Change your mind to solve the problem. If you encounter some problems, you don't need to look at how others implement them, but think about what to do if you do it yourself. What should I do? In this way, some problems will be solved. Instead of putting the mindset in the traps that others have previously buried, they cannot climb out. This method is very useful for handling performance and bottlen

: before the age of 35, you must train your speech skills. Many successful people are first of all excellent speakers. Chapter 9: 9 habits The power of habits is amazing. The habits you developed before the age of 35 determine the size of your success.1. Good habits of positive thinking.2. develop a good habit of efficient work-learn to like and get used to your office; be cautious in your life, but be cautious in your work; learn to listen and not interrupt others.3. develop a good habit

$.extendIn general, when using depth to expand two objects, the effect we want is that the B object overrides all the attributes that exist in the A object, and none is added to the A object;Let's take a look at the problems I've encountered:I hope that the editoption in TMP will be covered by the deep expansion of the editoption in the RET, so the depth extension method is adopted ret = $.extend (true,{},ret,tmp);But the result didn't work out the effect I wanted:The length of the array in the

Most Web-basedJava programmingPeople have done the basic work of "turning pages" and "submitting. These network programming steps are usually easy to implement. But I wonder if you have ever had such an experience: in some special circumstances, page turning is messy, but the next page should be 5th pages, but it turns to 3rd pages; it is only submitted once, the results are submitted twice in the shopping cart. Don't think we are dazzled or attacked by viruses. These are the

static blockq static BlockS static BLOCKP Contructorq contructors Contructorp Contructorq contructors contructor5. The static block of code for a class executes only once, when the class is loaded, because each class is only loaded once, so the static code block is only executed faintly, and the constructor is not constructed, and the constructor is called every time an object is generated, so the new one will call the constructor method6. If the inheritance system has both a construction metho

reasons for a Java memory leak.Note: System.identityhashcode (str); You can get a unique hashcode value for an object, and the return value of this indentityhashcode () is independent of whether the class overrides the Hashcode () method. Only if two objects are the same, their values will be the same.It is recommended that string strings be created with Stringbuiler.StringBuilder str = new StringBuilder ("Hello");System.out.println (str);SYSTEM.OUT.PRINTLN (System.identityhashcode (str));Str.a

Define an array, var temp = ["Hint 1", "Hint 2", "Hint 3"];Define a click-Trigger function for three buttons: for inch temp)　　{ var tip = temp[i];　　 var selector = "Input.button:eq (${index})". Replace (/\$\{index\}/, i);　　$ (selector). Click (function() {alert (TIP); });}As a result, three button hits are "Tip 3".With each loop of jquery, there is no such problem:function　　(i, Tip) { var selector = "Input.button:eq (${index})". Replace (/\$\{index\}/, i);　　$ (selector). Click (function() {ale

Deadlock in asynchronous traps Asynchronous programming is promoted to give users a better front-end experience, but asynchronous programming also greatly increases the learning cost and the chance of making mistakes. The most common and difficult to handle is deadlock. What is a "Deadlock"? The term "Deadlock". When two or more computing units are waiting for the other side to stop running to obtain system resources, but no one exits early, this situ

Python Tips and Traps (2), pythontraps 6. The collections module also provides OrderedDict for obtaining ordered dictionaries. Import collectionsd = {'B': 3, 'A': 1, 'x': 4, 'z': 2} dd = collections. orderedDict (d) for key, value in dd. items (): print key, value # B 3 # a 1 # x 4 # z 2 7. colleultdict module of the collections Module The defaultdict class is like dict, but it is initialized using a type (it can also be a callable function withou

first one? We can output the source code of Sayhey, there is a picture of the truth, as shown in:SummarizeThere is a difference between function declarations and function expressions in Javascript, function declarations are promoted in JS parsing, so in the same scope, the function can be called regardless of where the function declaration is defined. The value of the function expression is determined at the JS runtime and is called after the expression assignment is complete. This tiny differe

When using the repeating operator * for a list in Python, it is simply a shallow copy, and the internal structure is not duplicated, so the following example results: >>> lists =[[]]*3>>> lists[[],[],[]>>> lists[0].append (3)>> > lists[[3],[3],[3]] [[]] is just a list of elements, the element is an empty list, after performing a repeat operation, these three elements point to the same empty list, modify any of the elements in the lists will modify this empty list, so you must be t

(aquestion: int a = ten; A = aquestion:int a = ten; Double b = 9.5; System.out.println (A>b a:b);//10.0 result will be converted to double type System.out.println (a>b 1:false); 2 Although a Boolean cannot be converted to int, it can be converted to an object after it is actively boxedQuestions:int a = 1; a+=a+=a++; System.out.println (a);//3question:int a = 1; A + = 3l;//not error// a = a+3l;//error, high type low type

... ASayHello =functionSayho () { -Console.log ("SayHello"); - } the}Else { - //Hoisting ... -SayHello =functionSayho () { -Console.log ("SayHello2"); + } - } +Sayhey ();//= SayHey2 ASayHello ();//= SayHello　　Some people may suspect that the definition of function Sayhey is the second one covering the first one? We can output the source code of Sayhey , there is a picture of the truth, as shown in:SummarizeThere is a difference between function declarations and funct

Android activity can be started in four ways to record and open activity traps of other applications. androidactivity Android supports standard, singleTop, singleTask, and singleInstence. Standard is the most common method to start an activity and the default method. When an activity is started, it will enter the stack top of the returned stack. The system does not care whether the same activity exists in the stack. The method is as follows. Sing

[Nginx] common traps and errorsMany people may encounter a trap. The following lists the problems we often see and explains how to solve them. The # nginx IRC channel on Freenode is frequently discussed. 1. Do not use the 777 permission for permissions. view the directory permission 1 namei-om/path/to/check2, and set root to BAD: server {server_name www.example.com; location/{root/var/www/nginx-default/; # [...]} location/foo {root/var/www/nginx-defau