defragmentation definition

1. Unordered list An unordered list is a list of items that are marked with a bold dot (a typical small black circle). Unordered lists start with 2. Ordered list Similarly, a sequence table is also a column of items, and list items are marked with numbers. A sequence table begins with the 3. Definition List Custom lists are not just a list of items, but a combination of items and their annotations. The custom list starts with the The code is

CSS3 tips are only available for advanced browsers: Chrome Firefox Safari ie9+ Definition of valid, invalid and required The code is as follows Copy Code The code is as follows: Input:required, Input:valid, input:invalid{border:0 none; outline:0 none;-webkit-box-shadow:none;-moz-box-shadow: None -ms-box-shadow:none; -o-box-shadow:none; Box-shadow:none;} In the past, verify the form will be through JS and positive to determine whether the com

The array in PHP is actually an ordered map. A map is a type that associates values to the keys. This type is optimized in many ways, so it can be used as a real array, or as a list (vector), a hash (an implementation of a mapping), a dictionary, a collection, a stack, a queue, and more possibilities. Because the value of an array element can also be another array, the tree structure and the multidimensional array are also allowed.Role:1, management and operation of a set of data, data can be an

only one entity, the attribute name needs to be mapped to one of the above conditions,But there are many attribute names, too lazy to add it?In fact, there are methods, as long as the need to add the entity@JsonNaming(PropertyNamingStrategy.SnakeCaseStrategy.class)这样的注解就可以了The strategies you can use here are also consistent with those in the table aboveAboveReference Http://www.baeldung.com/jackson-advanced-annotations https://stackoverflow.com/a/40730352 Reprint Please specif

;timestamp = now; ...else { ...; }In this way, the compiler will be in the process of compiling, the more likely the code followed by the face of the code, thereby reducing the performance of the instruction jump caused by the decline.另外内核2.6.31.5中likely和unlikely另一种定义:# ifndef likely# define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1))# endif# ifndef unlikely# define unlikely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 0))# endifFor example (ke

1. Setting the value$name =test2. Value of the output variable echo$echo $name3. Add Variable ContentPath= $PATH:/home/bin/testPath= "$PATH":/home/bin/testPath=${path}:/home/bin/test4. If the variable needs to be executed in other sub-processes, the variable must be changed into an environment variable with export;Export PATH$name =test$bash$echo $name$exit$export Name$bash$echo $name$exitLinux definition variables, adding variable values

There are two types of threads, one is a user thread and the other is a daemon thread.The most classic implementation of the daemon thread is the GC (garbage collection Mechanism)A daemon thread is a special thread that is automatically destroyed by a daemon thread when there is no non-daemon thread in the process.Explain it in a more understandable metaphor:Any daemon thread is the "nanny" of all non-daemons in the JVM, and as long as there are non-daemons running in the JVM, the daemon will no

; /* Hash collision Chain (Hashed collision chain) */7uint32_t Cache_slot;/*literal cache slot*/8uint32_t Lineno;/*Line number (for AST nodes)*/9uint32_t Num_args;/*arguments number for EX (this)*/Tenuint32_t Fe_pos;/*foreach Position*/ Oneuint32_t Fe_iter_idx;/*foreach iterator index*/ A } U2; -};When a conflict occurs, the location of the original value is saved to the new value zval.u2.next , and then the location of the newly inserted value is updated to the hash table, which is where the co

First, define a basic function as an example:1 def Print (msg): 2 Print (msg)The function name is print, the parameter has one, for MSG, the function body calls the print system function, Output MSG.The next step is the variable parameter, which is a special feature, like the params in C #, but different.Example 1:1 def Printtuple (*args):2for in args:3 print (ARG) 4 5 printtuple ('Tom','Mary',' Lucy')Output Tom Mary Lucy in turn.It is important to note that the args parameter

) { - return("Alice", -) Wu } - About //External Parameter name $Func sum_6 (number num:int, Number1 num2:int),Int { - returnNum +num2 - } - A //Use # to simplify external parameters +Func sum_7 (#num1: Int, Num2:int)Int { the returnNUM1 +num2 - } $ the //function Default Parameters theFunc sum_8 (#num: Int, name:string ="Alice"),String { the returnName +String (num) the } - in //add an underscore to the paramete

VAR is not necessarily the boundary between the global variables and local variables used to define local variables for JScript: All variables outside the procedure body (including method function, object o ={}) regardless of whether you have a var reserved word, he is a global variable the object in the procedure body (including the method function () {}, Object o={}) plus the VAR reserved word is a local variable, without the addition of the VAR reserved word is the global variable : As long a

*{font-size:12px; margin:0; padding:0;}Method 1:#testBox {border:1px solid #cccccc;p adding:5px;width:220px;min-height:100px; /* Height minimum value set to: 100px*/Height:auto!important; /* Compatible FF,IE7 also supports!important tags */height:100px; /* Compatible with ie6*/Method 2:/* Use the following method alone can also be implemented */Height:expression (This.height -This article transferred from: http://www.cnblogs.com/hnyei/archive/2011/10/19/2217205.htmlFixed height div, automaticall

://docs.python.org/2/library/function.html#ABSYou can also view the help information for the abs function on the interactive command line via the Assist (ABS)return value of the functionReturn single value# !/usr/bin/env python # -*-coding:utf-8-*- def Numbers (x): if x>=0: Print(x) Else: Print(-x) Numbers (-5)Returns multiple valuesThe Math package provides the sin () and cos () functions, which we first refer to with import # !/usr/bin/env python # -*-coding:utf-8-*- Imp

1. Using a function pointer array to implement the calculator2. Call the corresponding function by a function pointer variable#include 　　Definition and use of a C function pointer array

implementation of operator== ().Is that qvector don't understand what you mean by inclusion. So you have to define the = = operator separately for data of type T. I think, compare two objects equal enough trouble, unless the logic really needs to save and manipulate the object directly, otherwise, as long as the comparison of two objects of the pointer (the first address) can be. that would be easier. Just like the Tlist in Delphi, the core management class of RTL, many RTL classes are implemen

The declaration of the JS function.The format of the declaring function is as follows:Function name (argument list) {//functions statement; return value;}See the specific function declaration.1. Common functions2. Functions with ParametersIt is important to note that for the JS function of the control that produces the callback Like button, return false at the end of the function and no callback. If for some simple operation on the page, or just call the background of a method of the JS function

, that is: -2147483648--2147483647On a 64-bit machine, the number of integers is 64 bits, namely: -2**63~~2**63-1, that is: -2147483648--2147483647Long Integer type:Python does not refer to the positioning width, theoretically can be infinitely large, but limited by memory; but there is no long in the python3, all of them are positive. Float type (float): 　is a set of a specific subset of rational numbers, In Python, the precision is limited to the precision of the default , all l

there is an instance object that modifies the shared data, the other instance object is also affected. Cat2.changesound ("La la La"); Cat1.makesound (); La La la I simply test the code One methodfunction cart (name){THIS.name = name;This.show=function (){alert (this.name);}}var Icart = new Cart ("Hello");Icart.show ();The methodvar cat = {Name: "Hello",Show:function () {alert (this.name)} }var cat1 = Object.create (cat);Cat1.show ();Three methodfunction Horse (){}H

by Context-param If you need to specify a configuration file location: > param-name> contextconfiglocationparam-name > param-value >/web-inf/myapplicationcontext.xmlparam-value> context-param> Once the configuration is complete, you canThe Webapplicationcontextutils.getwebapplicationcontext method gets the ApplicationContext reference in the Web App . Such as: ApplicationContext Ctx=webapplicationcontextutils.getwebap

class must be defined before it can be used. A class is a template for creating an object, which is also called an instantiation of the class. The following is a simple example to understand the definition of a class in Java: public class dog{ String name; int age; void Bark () {//Barking System.out.println ("Barking, don't Come"); } void hungry () {//Hunger System.out.println ("host, I am Hungry"); } Descriptio