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, and the configuration file is often carried out 2 coding, and even the results are 2-encoded, such as Doc, you need to use the Microsoft API to complete the modification. ) Because it is so simple to modify a text file, the Linux system itself must be regulated. This leads to the 2 concepts of users (groups) and permissions. The introduction of these 2 concepts is a perfect guarantee for Linux security without adding complexity. Because everything is a document. So Linux introduced 2 files to

pointer).A simple implementation of a auto_ptr:TemplateclassX>class auto_ptr{Private: x* ptr;mutable BOOLowns; Public:typedefX Element_type;Explicit auto_ptr(x* p =0) __stl_nothrow:ptr (P), owns (p) {}auto_ptr(Const auto_ptr A) __stl_nothrow:ptr (A.ptr), owns (a.owns) {a.owns =0; }TemplateclassT>auto_ptr(Const auto_ptr0; }auto_ptroperator=(Const auto_ptr A) __stl_nothrow {if(a! = This) {if(

possessed relationship, the latter is called the parent/child relationship. In this text, I put the owner window called the owners window. In other words, a window may be owned by a different window (owner) While there is a parent window, or it can have its own child window. In the CWnd Class of MFC, the owner window is saved in the M_hwndowner member variable, and the parent window is saved in M_hparent, but the two values do not necessarily correspond to the values in the Window object's data

is saved in the M_hwndowner member variable, and the parent window is saved in M_hparent, but the two values do not necessarily correspond to the values in the Window object's data structure.The relationship between the Windows determines the external performance of the window. such as display, destruction and so on.If the owner domain of a window data is not NULL, then it establishes a owner-owned relationship with the window, and the owning relationship determines:(1) The owned window is alwa

! = "Object" typeof descriptor! = "Function") | descriptor === null ){Throw new TypeError (ERR_NON_OBJECT_DESCRIPTOR + descriptor );}// Make a valiant attempt to use the real defineProperty// For I8's DOM elements.If (definePropertyFallback ){Try {Return definePropertyFallback. call (Object, object, property, descriptor );} Catch (exception ){// Try the shim if the real one doesn't work}} // If it's a data property.If (owns (descriptor, "value ")){//

| definePropertyFallback ){Var ERR_NON_OBJECT_DESCRIPTOR = "Property description must be an object :";Var ERR_NON_OBJECT_TARGET = "Object. defineProperty called on non-object :"Var ERR_ACCESSORS_NOT_SUPPORTED = "getters setters can not be defined" +"On this javascript engine ";Object. defineProperty = function defineProperty (object, property, descriptor ){If (typeof object! = "Object" typeof object! = "Function") | object = null ){Throw new TypeError (ERR_NON_OBJECT_TARGET + object );}If (ty

InitializeCriticalSection again. Precautions :1. The critical section allows only one thread to access at a time, and each thread must call the critical zone flag (that is, a critical_section global variable) before attempting to manipulate the critical zone data entercriticalsection. Other threads that want access are put to sleep, and the system stops allocating CPU time slices to them until they are awakened. In other words, a critical section can be owned by only one thread, and of course,

Critical sectionCritical section (critical section) is used to achieve "exclusive possession". Scope of application is a single processBetween the threads. It is:A local object, not a core object.Fast and efficient.Not be able to have more than one critical section at the same time being waited.Unable to detect whether a thread has been discarded.You can implement mutual exclusion between threads and cannot be used to implement synchronization.SemaphoreSemaphore is used to track limited resource

learn how to use half of the available range to build a ruler. Chart G Remember, all subnets start from an even number and all subnet endpoints are odd. note that 0.0.0.0 to 0.255.255.255 (0.0.0.0/8) is not used, and 127.0.0.0 to 127.255.255.255 (127.0.0.0/8) is used for loop address. 127.0.0.0/8 is interpreted as: the network ID is 127.0.0.0, The subnet mask is eight 1 on the left, and a bunch of 0 subnets on the right The values of the first octal group of all Class A addresses are betw

Simple logical Expression Lexical analyzer The logical expressions to be parsed are as follows: EXISTS (x) (missile (x) and owns (Father (Nono), part_of (x))) => sells (West,x,nono) To handle logical expressions, you must first extract parts of the logical expression: keywords (and, or, not, ForAll, EXISTS, =>), predicates, and arguments, and must be removed for extra spaces in an expression. This work is done by a lexical analyzer. The most basic pa

" another record if it represents it in the pagedirectory. Each entry in the page directory "owns" the records between Theprevious entry in the directory, up to and including itself . The Count Ofrecords "owned" by each record was stored in the record header, that Precedeseach record.The number of slots is specified in the first field of the Index header section of the page. Page directory contains at least Infimum and supremum slots. Therefore, the d