40gbase t switch

After the swich....case condition branches more, it will seriously destroy the aesthetics of the program. Like this one. The code above is used to communicate between two processes of code, because the enumeration of communication is particularly many, so the branch of case is particularly much. Causes the code to be readable, and maintainability is severely degraded. After finding the data and refactoring, I think of a feasible scheme to replace sw

mainly involves a variety of ioctl, there are too many ioctl, and all of them are written in a function using swich case, it must be smelly and long. this improves code readability and maintainability .?This indicates the v4l2-core willV4l2_file_operations is divided into two interfaces, one isIoctl, anotherOther v4l2_file_operations members .?Here we know that to implement a v4l2 driver, we must implement the following: v4l2_ioctl_ops Other v4l2_fil

{public function test () {$subject = new subject (); $subject->attach (New Observer1 ()); $subject->attach (New Observer2 ()); $subject->notify ();//output: Amount of data plus 1 points plus 10}}The Observer pattern is more suitable for situations where a subject needs to dynamically add attributes or other related items, such as a swich operation, when the switch needs to increase the variety frequently, and you do not wa

){System.out.println ("n1>n2");}Else{System.out.println ("n1}}4.2.2switch Multi-Branch statementFormat:switch (expression){CASE constant 1:Language block one;Break......Case constant 2:Language block two;BreakDefaultStatement block N+1;Break}The value of an expression in a switch statement must be an integer (not long) and a character type, and in a switch, constants must differ from each other.In switch, the value of a constant expression after a case statement can be an integer, but it must ne

constantsSecond, operatorArithmetic Operators+ 、-、 *,/,% (remainder operation can only be used for integer type)Relational Operators> >= == !=logical Operators！ | | (the expression whose connection is evaluated from left to right, and stops the calculation immediately after knowing that the result value is False or True )bitwise operators (only for integer operands) (to be continued ...) ）~ | ^ Type Conversions (when several operand types of an operator are different, they need to be converte

. writeLine ("******* after the unbinding method Write2 ******"); gm. delegate1-= Program. write2; // unbind gm from the delegate method. sayHello (1, 2); // After unbinding, only the Write1 Console is called. readKey ();} The running result is as follows: the delegate only executes Write1. 3.4 what is a delegated chain In other words, a multicast delegate can generate a delegate chain and bind and unbind the strings with the + = and-= operators, bind multiple methods to the delegate variable t

side, and the data type is the same), >=, >,7) logical operators: | óor, óand, xor (true is returned when only one of the left and right sides is true ),!4. Notes:Single line comment ://,#Multi-line comment :/**/5. Each statement ends with a; sign, which is the same as java6. define constants: define ("CONSTANS_NAME", value)7. print statement: print, same as C Language8. Process Control statements1) if statement:(1) if (expression){// Code to excute if expression evaluates to true}(2) if (expr

conditionScope: Specify the range of VarSimilar to Swich statements in JavaMethod Body 1Method Body 2Method Body 3Ø Iterative Labeling Used to repeat nested tag body contents in a collection of true individual objectsBody Contentwhichvar: Specifies the name of the exported range variableItems: Specifying a collection of objects to traverseVarstatus: Specifies the name of the range variable for the traversal state.Begin: Index to begin traversalEnd: I

ConsoleApplication1Demo1{ class MainClass { public static void Main(string[] args) { int num = Console.Read(); if (num > 10) { Console.WriteLine(num-10);} else if(num>0){Console.WriteLine(num);} else { Console.WriteLine(num + 10); } } }} Can be seen (Figure 1), the result is not correct, but the sense of logic is not wrong, a closer look, read can only read the next character, but it is not readline. Actu

: declaring delegates and registering methods (also called binding methods)1. Declaration of Delegationdeclaration with delegate;2. Binding methodBinding concrete method, passing the method name;(v) Type of consignmentDelegate types, generally divided into multicast delegates and unicast delegates1. Unicast delegation: How to bind an order2. Binding Multiple methods(vi) Entrusted operation1. Binding method2. Unbind methodWhat problems can be solved by two delegates (can do)1. Avoid the existence

executed according to the size value. The disadvantage of switch is that the Code defining swich and the Code defining enumeration types may be different. If an enumeration value is added, you must modify the switch code as well, but you may forget it, if an abstract method is used, it cannot be forgotten. When defining enumeration values, the compiler will force the relevant behavior code to be defined at the same time. Therefore, if the behavior co

URL Httpurl =Newurl (URL); HttpURLConnection Conn=(HttpURLConnection) httpurl.openconnection (); Conn.setrequestmethod ("GET"); Conn.setreadtimeout (5000); InputStream in=Conn.getinputsteam (); Xmlpullparserfactory Factory=xmlpullparserfactory.newinstance (); Xmlpullparser Parser=factory.newpullparser ();p arser.setinput (in,"UTF-8");intEventType =Parser.geteventtype ();FinallistNewArraylist(); Girl Girl=NULL; while(EventType! =xmlpullparser.end_document) {String Data=parser.getname ();