ecobee differences

', ' hehe3 '} #这种方式是直接定义一个集合List1 = {1, 2, 3, 4, 5, 6, 9}List2 = {2, 3, 4, 6, 1}List3 = {1, 2, 3}Print (List1.intersection (LIST2)) # Take the intersection, that is, take List1 and List2.print (List1 list2) # take intersectionPrint (List1.union (LIST2)) # takes the union, which is to merge List1 and List2, and then remove the duplicatePrint (List1 | list2) # FETCH and setPrint (List1.difference (list2)) #取差集 exist in list, not in List2print (LIST1-LIST2)Print (List3.issubset (list1)) #判断list3是

Indicates that the element is a label and a p:nth-child(2) p second child element , which is two conditions that must be met.So, the first p label color is red (just match: P tag, second child element). If you div insert a label after the label span , the following:Then p:nth-child(2) no elements will be selected. p:nth-of-type(2) represents the second p element under the parent tag , and it is clear that the div span h1 p text in the second label is red, whether it is inserted after the label

occurs, the system throws the exception all the way to the top and continues to experience processing code. If there is no processing block, to the topmost level, if it is multithreading is thrown by Thread.run (), if it is a single thread is thrown by main (). Once thrown, the thread exits if it is a thread. If the exception is thrown by the main program, then the entire program exits. Runtime exceptions are subclasses of the exception, and there are general exceptions that can be handled by c

return or space in the middle. Otherwise there may be problems, such as 3px deviations, and the reason is hard to find.It was unfortunate that I had this problem again, multiple IMG tags attached, and then the definition of float:left, I hope these pictures can be linked together. But the results are normal in Firefox and every img shown in IE is 3px apart. I have no effect on removing the spaces between the tabs.Later, the solution is to set up an IMG outside the Li, and the Li definition marg

var str1= "http://baidu.com"; var str2= "http://baidu.com/~#$* (_+"; var str3= "Http://baidu.com/my page"; Console.log (encodeURI (str1)); Console.log (encodeURI (str2)); Console.log (encodeURI (STR3));　　Operation Result:　　encodeURI () will not escape:;/?:@=+$,#-_.! ~* ' (), but the space is escaped, in order to fully encode the URI　　 var str4= "http://baidu.com"; var str5= "http://baidu.com/:;/?:@=+$,#"; var str6= "http://baidu.com/my page/04563"; var str7= "http://ba

.*/ void Create (link link temp,current;//temp temporary space for adding nodes lt = (link) malloc ( sizeof (struct link);//Create a head node Lt->next = null;//short node current = lt; int value; printf ("input data"); //Create node for (int i = 0; i temp = (link) malloc (sizeof (struct LINK)); if (temp = = NULL) { printf ("Failed to allocate space"); Exit (0); }//ifend scanf_s ("%d", value); Temp->value = value; Current->next = temp; Current = current->next; }//forend Temp->nex

aextern can extend both the scope of the external variable in this file and the scope of the external variable from one file to another, the system's processing rules are:1, first in this document to recruit the definition of external variables, if found, in this file extension scope;2, if not found, in the connection when the external variables from other files to find the definition, if found, will extend the scope to this file;3, if not found, press error handling3. Static external variable

;Ibid methodThe value of a is changed, and a point to the 4,b value is not changed.PS: If it is two objects, then it is different, the object points to the same reference, one changes, the other changes4. Stack and heap differencesThe JVM is a stack-based virtual machine. The JVM allocates a stack for each newly created thread. In other words, for a Java program, it runs through the operation of the stack. The stack holds the state of the thread in frames. The JVM operates on the stack in only t

written code problems, such as the array out of bounds are not considered, NULL pointer exception does not take into account such information, so do not need to pass the throws processing, can be thrown directly, thrown to do not require the caller to handle, The caller can either handle it or not, and if it does not, it will be thrown up and then thrown to the virtual machine to stop the current thread. When other exceptions occur, we can capture this exception (Try-catch) or throw the exc

, nonzero, which is true 2, nonzero, true, Truetrue = True The result is true. The whole process of operation needs to be transformed. The binary direct comparison of operands is not directly used. So the results are different. At the time of comparison, true should be converted to a binary value like 11111111, false may turn into 00000000. The is the same here, that is, for an operand. 's operand is true/false regardless of what type of expression you are using, he first converts to one

code has been introduced, then the query is how to execute it exactly?The answer is that the interface caches the query expression in the expression tree first, and only when the true traversal occurs, will the expression tree be parsed by Iqueryprovider, and the SQL statement executed to perform the database query operation.Gee, it's almost finished now.The above describes the two interfaces of the difference and contact, the specific use of which is to see their own project requirements.Final

C++and C # differences and Links C constructor C language syntax structure, c++and C # Basically the same, only the following aspects are different:1, inheritance: C + + supports multiple inheritance, C # classes can only inherit implementations from one base class, but multiple interfaces may be implemented.2, arrays: The syntax for declaring C # arrays and declaring C + + arrays is different. In C #, the "[]" tag appears after the array type.3, data

I want to represent let's go this string, it must:S4 = ' let\ ' go ', note that there is a ' in the string, and the string is used ' to denote, soThis is the time to use the escape character \ (\, escape character should know), if your string has a large heap ofThe escape character, looks certainly uncomfortable, Python also solves this problem very well, as follows:S5 = "Let ' s Go"At this point, we see that Python knows that you are using "to represent strings, so Python will put that in the

be written and readable Create Is 0 A can only write Create No, append write At last A + Readable and writable Create No, append write At last You can make a test file, modify the next open mode, and then output look at the pointer differencef=open(‘I:\\python\\test\\text.txt‘,‘r+‘)print(‘指针在:‘,f.tell())lines=f.read()if f.writable(): f.write(‘nono\n‘)else: print("此模式不可写")print(‘指针在:‘,f.tell())f

dispatch, all the threads share all the resources and code of the process to which they belong.3, the process of thread execution is easy to synchronize, and the process needs to be synchronized through message communication.4, the thread partition scale is smaller, the concurrency is higher.5, threads share the process of data at the same time, have their own private stack.6. Threads cannot be executed individually, but each thread has a program's entry, execution sequence, and program exit. I

this.sayName != "function"){ Person.prototype.sayName = function(){ alert(this.name); } }}Parasitic constructor modeIt is recommended that you do not use this mode in situations where other modes are available.Secure constructor ModeSafe object: As the name implies, is very safe, refers to the absence of public properties, and its methods do not reference this object. Secure objects are best suited in some secure environments where this and new are forbidden.function

browser support for HTML5, CSS3: http://tools.yesky.com/233/30105733.shtml Support Detection for WEBGL: http://doesmybrowsersupportwebgl.com/ Add-ons let IE support webgl:http://www.iefans.net/iewebgl-ie-zhichi-webgl/ about WEBGL:WEBGL is a 3D drafting standard that allows the combination of JavaScript and OpenGL ES 2.0, and by adding a JavaScript binding to OpenGL ES 2.0, WebGL can be HTML5 Canvas provides hardware 3D accelerated rendering so that Web developers can use the system

Uri-url-urn differencesURI (Uniform Resource Identifier) Uniform Resource identifier, used to uniquely identify a resourceURL (Uniform Resource Locator) a Uniform Resource Locator, which is a specific URI that the URL can use to identify a resource and also how to locate the resourceThe URN (Uniform Resource name) is a uniform Resource name that identifies resources by name, such as Mailto:[email protected].Urns Define Uniform resource identities in an abstract, high-level concept, whereas URLs

First, IntroductionA jar package that supports Servlets. It should be called Servlet-api.jar.If you write a servlet, you know that objects such as httpservletrequest and HttpServletResponse are used by this jar package.If you have Tomcat installed, this jar package is typically under the Tomcat installation directory \lib folder, and when you deploy the Web project to Tomcat, it will automatically load the jar to identify some Serlvet objects.Second, the differenceBoth of these artifacts are the

assign to keywordIteratorsMany of the built-in functions and methods in Python2 return list objects in Python 3 have been changed to return objects similar to iterators, because the lazy loading of iterators makes it more efficient to manipulate big data. The range and xrange functions in Python2 are combined into range, if they are compatible with both 2 and 3:Try : = xrangeexcept: PassIn addition, the Dict.keys (), Dict.values () method of the Dictionary object no longer returns a list