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←divide-and-conquer (pi) recursive solution pi6. T←merge (y1,y2,..., yk) merging sub-issues7. Return (T)Among them | P| indicates the size of the problem p, N0 is a threshold value, indicating that when the size of the problem p does not exceed n0, the problem is easily solved and no further decomposition is necessary. Adhoc (P) is the basic sub-algorithm in the division method, which is used to solve the problem P of small scale directly. Therefore,

word2010 to make it easier for users to find the last document they opened, there is a feature that records the documents you have recently used. This feature is really convenient for our day-to-day office work, but the pros have disadvantages, so that we can disclose the privacy of our documents, but how to delete or hide our recently used documents? How do you delete the most recently

NmapNmap + IP Address scan host open portNmap-p 1-x + IP address scans specific host portsNmap-v-A-SV +IP address detailed scan hostNmap-p Port +IP address 192.168.1.* specific IP in clusterNmap-o System TestingNMAP-SV ports running on the +IP serviceZnmap graphicalPOF fingerprintTool can scan the capture fileRecon-ng reconnaissance using reconnaissance/HOST/enumeration/HTTP/network/xssed)Target domainUse many modulesNetdiscover can check all the hosts on the LANis a set of Nmap, Nikto, Hydra an

writing and usageThe first thing to understand is that in JS everything is an object, and a function is a kind of object. Let's take a look at the 5 types of closures, and simply understand what closures are. It will be explained in detail later.The 1th notation function Circle (r) { THIS.R = r;} Circle.pi = 3.14159functionThisnew Circle (1.0 There is nothing special about this notation, just adding some attributes to the function.The 2nd notation function() { new Object ()

Came to the weekend, little bastard finally have the energy and time to update the next blog. A short time ago, Bastard read a code, a variety of data structure of the flexible use of praise, but also greatly stimulated the small bastard on a variety of data structure to comb and summarize the desire. Just recently also read a number of great God's articles, feel summed up the commonly used data structure for their own can also be flexible use becomes

The. NET platform is great. It's really great. Until it's no longer so great. Why am I no longer using. NET? In short, it limits our ability to choose (which is important to me), diverting our attention and making us aware of its security, instead of all the possibilities that help us to perceive the wider world outside.　　[Fasten your seatbelt: the length of this article is almost a book ...]AdvantagesFirst, let me start by saying that. NET is doing the right thing, although most of it doesn't c

Overview of Threads:A thread is a program's multiple execution path, the unit that executes the dispatch, relying on the process existence. The thread can not only share the memory of the process, but also have a memory space of its own, which is called the line stacks, which is allocated by the system when the thread is established, and is mainly used to hold the data inside the thread, such as the variables defined in the thread execution function.J

"/". 　　 2. Character classYou can combine individual direct characters into a character class by putting them in brackets. A character class matches any of the characters it contains, so the regular expression/[ABC]/And the letter "a", "B", and "C" all match. In addition, you can define a negative character class, These classes match all characters except those contained within the brackets. To define a negative character tip, use a ^ symbol as the first character from the left bracket. The col

-channel stereo, but as a free tool, quite impressive. Audio Hijack Pro: Provides a balanced tool for output audio for individual applications, with more than 100 plugins (which you can use simultaneously), and supports standard VST plugins. Audiox: Equivalent to the Windows System recorder, but the interface is more beautiful, more functions, you can save files in a variety of formats. Backup: Apple provides the. Mac user with the backing software, you can back up the main application settin

external resources when needed or in the Page_Load method.Never store any STA COM component in a shared resource that can be accessed by threads other than the thread that constructs it. Such resources include resources such as caching and session state. Even if an STA thread invokes an STA COM component, only the thread that constructs the STA COM component can actually call the service, which requires marshaling calls to the creator thread. This marshaling can have significant performance los

Label: Company projects have been using MyBatis as a persistent layer framework, natural, dynamic SQL is also more written, the most common is to use the IF tag in query statements to dynamically change the filter conditions. One of the great features of MyBatis is its dynamic SQL, which eliminates the hassle of splicing SQL, which is common and uncommon in the development of your project, and you can now summarize this piece. 　If Choose (when,otherwise) Trim (Where,set) Fo

what circumstances are indexes, but not used?Indexes do not always take effect, such as the following, which will invalidate the index : If there is or in the condition, even if some of the conditions in the index are not used ( which is why the use of or is minimized ), in the example user_id no index Note: If you want to use or, and you want the index to take effect, you

whether you can add only new drawing objects or overwrite existing drawing objects in the current axis. Use hold on to preserve the current shape's property values from the current axis, and the graphics command that follows can only add graphics to the currently existing axis. However, when the data range of the new shape exceeds the range of the current axis, the command automatically changes the range of the axis to fit the new shape. Hold off before drawing a new drawing, reset the axis pro

A ShiftParameter shift LeftUntil [$#-eq 0]Doecho "The first parameter is: The number of arguments is: $#"ShiftDoneTwo WcThis command is used to count the number of bytes, words, and lines in the specified file. The command options have the following meanings:-L count rows-W Count Count-C Statistics byte numberThese options can be used in combination. The order and number of output columns are not affected b

Third, index6. Several common possibilities for adding an index but not being usedThe previous talk about when not to use the index, but sometimes used is not necessarily used.Here are a few things that have been indexed but not used1) Multi-column index query condition does not use leftmost fieldFor a multi-column index that is created, the index is not used if the query condition does not use the leftmost

The members of a class are divided into two classes, static members (static member), and instance members (instance member). A static member belongs to a class and an instance member is an instance of an object, that is, a class.A brief discussion of whether static fields and static methods are used in a class is a thread-safe issue.We are aware that the call to static field and static method is called through the class. Static methods do not operate

My personal blog is: www.ourd3js.comCSDN Blog for: blog.csdn.net/lzhlzzReprint please indicate the source, thank you.A very important concept was used in the previous section-scale ( This does not know what to translate into, let's call it proportions ). This section will focus on how it is used.Before introducing scale, let's introduce two functions that appear together with the scale, and also appear in the previous section. D3.max ()

The following are the conditional functions that can be used in the body of the FindProxyForURL () function:Host-Name-based functions: isPlainHostName () dnsDomainIs () localHostOrDomainIs () Isresolvable () isInNet () Related Utility functions: Dnsresolve () myIpAddress () dnsDomainLevels () Conditions based on url/host name: shExpMatch () Time-based conditions: Weekdayrange (

so on can be used to assign values. The parameter Val (arraySlice (Start,[end])Select a matching subset.Add (expr)Adds an element that matches an expression to a jquery object. This function can be used to concatenate the result set of an element that matches two expressions respectively.The parameter expr (string, domelement, arrayNextall ([expr])Finds all elements after the current element.Prev ([expr])G

precise timing in microseconds Long Long l1,l2,l3; Timeval TV1; Take a Time Gettimeofday (tv,null); L1 = tv.tv_sec*1000*1000 + tv.tv_usec; Execute some code, such as algorithm 1 ... Second time taken Gettimeofday (tv,null); L2 = tv.tv_sec*1000*1000+tv.tv_usec; Execute some code, such as algorithm 2 ... Gettimeofday (tv,null); L3 = tv.tv_sec*1000*1000+tv.tv_usec; printf ("%lld%lld/n", L2-L1, L3-L2); You can see the execution time of two algorithms in microseconds (one out of 10,000 seconds