letterform anatomy

-pattern (param-pattern) Method Name (parameter Name) Package Name. Name of the Type. method name"throws-pattern") throws Exception typepublic void Dolog (String Log) {}The object that the Pointcut expression matches is the method name of the target Method. therefore, the execution expression is clearly the signature of the Method.Note : The part of the expression that adds [] can be omitted, separated by a space between the Sections. The following symbols can be used in them:Symbolic meanings:*

, we briefly introduce Linkedhashset, which is a subclass of HashSet, but uses linkedhashmap internally.If you need a map implementation class, and the type of the key is an enumeration type, you can use HashMap, but you should use a dedicated implementation class Enummap, why? Let's discuss it in the next section.----------------To be continued, check out the latest articles, please pay attention to the public number "old Horse Programming" (Scan the QR code below), from the introduction to adv

order to be consistent with the concept of the iterator (begin points to the first element of the iterator, end points to the next position of the last element of the iterator), and is a little different from the forward iterator.The implementation of Reverse_iterator has a iterator named current, which is a template parameter, which is a forward iterator. The forward iterator points to the first element in the sequence to the next position in the last element, in order to maintain the unity of

1. Extends Struts-default (result type) on Struts.xml page(1) Dispatcher request Forwarding (system default)(2) Chain Action link (that is, forward, from one action to another action, and in the same request)(3) Redirect Redirect to a resource(4) Redirecraction Redirect to an action2. The way to complete the content of the form by forwarding the request will cause the content to be inserted repeatedly.The add request is sent to the servlet, which has two functions to add functionality and query

Anatomy of event distribution source code in QTEvent delivery sequence in QT:In a supposed program, it goes into an event loop, accepts the events generated by the system, and distributes them, all in exec.The following examples illustrate:1) First Look at the following example code:[CPP]View Plaincopy int main (int argc, char *argv[]) { Qapplication A (argc, argv); MouseEvent W; W.show (); return a.exec (); }

contained in the slash. For example, A?b will match/XYZ/123/ACB but does not match/xyz/acb/123 Expand Handling Dynamic Src-dest File mappings Example: Filterclean : {: {src: [ ' tmp/**/* ' ], filter: ' isfile ' , }, bar: {src : [ ' tmp/**/* ' ], filter: function (filepath ) {return (Grunt.file. require ( ' FS ' ) . readdirsync (filepath) . length = = 0 ) ; ,}} Where Isfile is the method in Fs.stats, can be directly referenced! Of course, you c

a bit field, but an int type remaining bit space is not enough to store, A2 and B2 accounted for 24 bits, the remaining 8 is not enough to store B3. At this point we can open up a new int type to hold the B3 20 bits of data. In Short, the trilogy of building type structure checkdeclarationspecifiers, Checkdeclarator, and Derivetype are the key points. On this basis, it is relatively easy to understand the function Checkenumspecifier for checking enum enum and the Checktypedef function for

After a rough anatomy of issuevision over the weekend, I found that some areas are similar to the practices of my current project. Threadhelper. dll: Provides thread-related componentsSplash ScreenSingletonapp unique Program The second instance does not act.Safelabel-label that can be operated securely under multiple threadsBackgroundworker background workerRunworkeransy () starts background workDoworkeventhandler background execution start event exe

, which is unwise. Because the so-called expansion of space (no matter how large), as mentioned earlier, is "the allocation of new space/data movement/release of the old space ," The Big project, the time cost is high, should be added to some kind of precautionary consideration.In addition, because the vector maintains a continuous linear space, the vector supports random access .Note: Vector dynamically increases the size, not after the original space after the continuous new space (because t

", which indicates that the next content is the code area. Since SRC1 is loaded into register Reg in line 7th, we can use the name of the register in the assembly instruction, so we will change the SRC1 of the intermediate instruction to the corresponding register on line 37th. Line 38th calls Clearregs to write the necessary writeback to the registers in the x86 CPU, and line 41st calls Putasmcode to produce a assembly instruction that is shaped like "jmp*swtchtable1 (,%eax,4)".Figure 6.3.8 Emi

servletinfo, which can be said to be a collection of servletinfoservletcontainer: Container for managing Deploymentinfo, one container can add multiple DeploymentinfoDeploymentmanager: Management of the package deployment is a reference to the Deploymentinfo added to Servletcontainer for running the publishing and launching containersHttpHandler: servlet path processor, Deploymentmanager the servlet processor returned after startup, usually Httpcontinuereadhandler (continuous read processor)Pat

a 4-byte integer into the stack.Figure 6.3.10 Pushargument ()In the 26th line of Figure 6.3.10, we give the shape as "*ptr = number;" , UCC calls this command indirectmove, we will load PTR into the register on line 35th, we might set it to eax, and then change the middle instruction of "Movl num,%ecxMovl%ecx, (%EAX)Similarly, the Emitderef function of line 48th to 58th of Figure 6.3.10 is used to deal with the intermediate instruction of the form "T2: *ptr", the corresponding four-tuple is MOV

is saved in the x87 stack top register.Figure 6.3.4 Emitx87move and EmitmoveblockFigure 6.3.4 the Emitmoveblock of line 26th to 55th is used for assignment between struct objects, and for line 39th, "a = B;" , the structure object A to occupy 40 bytes, the corresponding assembly code in line 43rd to 46th, where the register {EDI, ESI, Ecx},esi used to store the address of B, EDI for the address of a, ECX storage to copy the number of bytes, the 46th line of "Rep MOVSB" Memory replication is imp

= Request.geturi (); String servletname = uri.substring (Uri.lastindexof ("/") + 1); URLClassLoader loader = null;try {URL urls[] = new URL[1]; URLStreamHandler streamhandler = null; File ClassPath = new file (constants.web_root); String repository = (new URL ("file", NULL, Classpath.getcanonicalpath () + file.separator)). ToString (); Urls[0] = new URL (null, Repository, streamhandler); Loader = new URLClassLoader (URLs);} catch (IOException e) {System.out.println (e.tostring ());} Cl

Content: There are some security issues in the previous article because we need to transform request and response into ServletRequest and Servletresponse, A servlet programmer who understands how this servlet container works can transform ServletRequest and servletresponse down and then invoke the parse () of request and response. and Sendstaticresource (). So we need to use the appearance class to solve, add two Requestfacade and Responsefacade, then each have request and response, and then eac

same cache key in flight.Synchronized (mwaitingrequests) {String CacheKey = Request.getcachekey ();if(Mwaitingrequests.containskey (CacheKey)) {//There is already a request in flight. Queue up.Queue>> stagedrequests = Mwaitingrequests.get (CacheKey);if(Stagedrequests = =NULL) {stagedrequests =NewLinkedlist>> (); } stagedrequests.add (Request); Mwaitingrequests.put (CacheKey, stagedrequests);if(volleylog.debug) {VOLLEYLOG.V ("Request for cachekey=%s are in flight, putting on hold.

back and forth "eax, EBX, ECX, edx, ESP and EBP" 6 registers, 6.2.3 the 37th line.The code of the function savex87top in line 48th to 57th of Figure 6.2.3, the Putasmcode function called by line 53rd produces the write-back instruction of the floating-point number, we will parse the Putasmcode function in subsequent chapters, and the 56th row x87top is null to indicate that no temporary variables need to be written back.We also find that when the control flow leaves the above basic block BB4, w

? This is simple, because we often use the gesturedetector, add a listener just to see the code implementation Mgesturedetector = new Gesturedetector (Imageview.getcontext (), new Gesturedetector.simpleongesturelistener () { //forward long click Listener @Override public void Onlongpress (Motionevent e) { if (null! = Mlongclick Listener) { Mlongclicklistener.onlongcli

on line 15th to 22nd to achieve zero, otherwise we will generate the assembly code through the 32nd line, In which the Memset function is called to implement the object zeroing. Since register EAX is used in the assembly instruction template x86_clear, we need to call the Spillreg function on line 28th to write back the register EAX.At this point, we have completed the work of generating assembly code for each intermediate instruction.Finally, let's take a look at the compile function, 6.3.16,

Why do I need JNI?Android this huge system from bottom to top consists of the Linux kernel, C + + libraries, Java application framework, Java applications. This involves a question of how the C + + libraries intersect with Java applications, or can call each other, to solve this problem, we need JNI debut.Analysis of JNI invocation mechanismJni--java native Interface, translated into Chinese is a Java local interface, the so-called "local" refers to the C/D + + library layer C/C + + language (he