mux logic

Introduction: Using the Rules engine can reduce the maintenance and scalability costs of applications by reducing the complexity of components that implement complex business logic. This updated article shows how to use the open source Drools rule engine to make Java™ applications more adaptable to change. The Drools project introduces a new local rule expression language and an Eclipse plug-in that makes Drools easier to use than ever before. Most o

ORACLE application optimization: Please avoid SQL processing in a large number of cyclic logic, oracle Optimization I encountered a case a while ago: a colleague said that a previously running package was suddenly much slower than before and the execution time was very long, in the evening, the job calls this package and does not run data for several hours. So I located an SQL statement in a stored procedure in the package during the tracking and opti

SQL execution time within the cursor takes 2 seconds, previously only 30 cycles, then the SQL needs to be 2*30=60 seconds, if the number of cycles suddenly increases to 8,000 times, 2*8000=16000 seconds, this is a few hours of time. As you can imagine, this performance suddenly drops to an intolerable level! So how to optimize it? Reduce the number of cycles, of course. After a careful look at this SQL, figuring out the business logic of the man who

the statement 2 is with the operation, so there is no need to do with the operation, the first two conditions are false, at this time, the 3rd statement must be executed.The effect of this command is: if the condition 1 satisfies the execution statement 2, if the condition 1 is not satisfied, then executes the statement 3.Bash Programming : character Testing　　　　　　Binocular operator :: Greater Than= =: The left side is a string, the right is a pattern, determine the left side of the string, can

\: Return to disk root directoryCD: return to the previous levelCD: go to that directory fileCLS: Clear Screenexit: ExitMD: New Catalogdir: View all folders and files under the current folderToggle Drive Letter: Drive letter Name: - , using the Doc window to run the Java file step:1), enter the name of the disk where the file is located, and then enter2), Enter the Javac file path (you can also drag the file you want to run into the DOS window), and then enter3), Enter the Java file name,

-*-#Author:hkey#Job Title:#1. Use the while loop to enter 1,2,3,4,5,6 8,9,10Count=0 whileCount : Count+ = 1#equivalent to Count = Count + 1 ifCount = = 7: Continue #continue end this cycle, start the next loop, continue the following code is no longer executed Print(count)#2. Ask for 1-100 of all numbers andNum=0 forIinchRange (1, 101):#Range takes a range of 1, 100 of all numbers, through the for loop to iterate the additionnum + =IPrint(num)#3. All odd numbers of output 1-100Pr

Package Mainimport "FMT" Func Main () {//Run Result: AIF true | | b () {//go If judgment takes a short-circuit evaluation, the value has been determined that subsequent expressions will not be evaluated and will not be called FMT. Println ("a")}//run Result: Baif or (true, B ()) {//function parameters must be immediately evaluated by FMT. Println ("a")}//Run Result: AIF Orfunc (true, b) {//functions that pass in function parameters implement lazy evaluation FMT. Print ("a")}}func B () bool {FMT.

current image when the video or the image of the refresh, if the video is flushed back to exit, then determine whether lossless or lossy compression, call the relevantfunction interface. JPEG is lossy compression, which uses lossless compression according to the settings here.->red_marshall_qxl_drawable->red_marshall_qxl_draw_copy->fill_bits,fill_mask->red_compress_image into the selection of image compression algorithm, currently between the Quic and Glz LZ algorithm, the default is Glz, accor

There is no problem, forgive me just a look at the results of the guy ...Verify that the format is in YYYYMMDD format.Http://www.cnblogs.com/oliver_zh/archive/2009/08/18/1548713.htmlvar p =/^ ([0-9]{3}[1-9]|[ 0-9]{2}[1-9][0-9]{1}| [0-9] {1} [1-9] [0-9] {2}| [1-9] [0-9] {3}) (((0[13578]|1[02)) (0[1-9]|[ 12][0-9]|3[01]) | ((0[469]|11) (0[1-9]|[ 12][0-9]|30)) | (02 (0[1-9]|[ 1][0-9]|2[0-8]))) | (([0-9]{2}) (0[48]|[ 2468][048]| [13579] [26]) | ((0[48]| [2468] [048]| [3579] [26]) 00)) 0229) $/;JS Reg

Power outage analysis, as the name suggests, is the logical analysis of the drawings for power outages. In the electrified line, a line is from a power supply, connecting a lot of equipment, power outage analysis, there are two important roles: first, see whether the shape on the drawings are connected to the normal, and the second is to see which equipment has no electricity. By giving an electrically-powered device a color (such as green), a device that has no electricity, a color (such as red

informationWhen we are Cat/proc/cpuinfo,CPUs with the same core ID are Hyper-threading of the same coreCPUs with the same physical ID are the same CPU-encapsulated thread or core㈢ The following examples illustrate① View the number of physical CPUs#cat/proc/cpuinfo |grep "Physical id" |sort |uniq|wc-l4② View the number of logical CPUs#cat/proc/cpuinfo |grep "Processor" |wc-l80③ View CPU is a few cores#cat/proc/cpuinfo |grep "Cores" |uniq10I check here is the CPU belongs to the server, should be

Visibility: Multiple threads can share access and manipulate the same variables, but one thread changes to a shared variable, and the other thread doesn't have to see it right away, or even never see it. Because it involves registers and cache levels.Solution: Using the volatile keyword Using the Synchronized keyword 5, synchronizedSynchronized can be used to modify an instance method of a class (protect this), a static method (a protected class object), a code block (arbitrar

, the whole process is called context switching, which is not only time consuming, but also invalidates many caches in the CPU, which is a cost.Of course, these costs are relatively relative, and these costs are acceptable if the threads actually do a lot of things, but if you just perform the counter++ in the example in this section, that would be too expensive.In addition, if the tasks performed are CPU intensive, that is, the CPU is mostly consumed, it is unnecessary to create a thread that e

(Passwordfield_2.getpassword ()). Trim (); Try{dos.writeutf (phone); Dos.writeutf (password); } Catch(IOException E1) {e1.printstacktrace (); } } Else{javax.swing.JOptionPane.showMessageDialog (logindialog). This, "Input password is inconsistent ..."); System.out.println ("Input password is inconsistent ..."); Passwordfield_1.settext (""); Passwordfield_2.settext (""); } }Else{javax.swing.JOptionPane.showMessageDialog

#!/usr/bin/python#coding: Utf-8Import reZ=0File=open ('/var/log/httpd/access_log ')For I in file:X=re.search (' Firefox ', i)If x:Z+=1File.close ()Print "Number of times:", Z#!/usr/bin/python#coding: Utf-8Import redic={}Data=open ('/var/log/httpd/access_log ')For I in data:m = Re.search (' (firefox|chrome) ', i)If M:Key=m.group ()Dic[key]=dic.get (key,0) +1Print dic#!/usr/bin/python#coding: Utf-8Import redic={}Data=open ('/var/log/httpd/access_log ')For I in data:m = Re.search (' (\d+.) {3}\d+ '

real fake, fake it for real.So what is the result of using and or not combining together? Example:What is the meaning of this phenomenon, just now I said, the logical operation is from the left to the right of the operation, first count not is not the true,true is true meaning, add a not is not true, that is flase, then add a not, and the fake made the real. So the result of not true is true. Well, now that it's out, it's not going to be the back of the operation. So the direct display of a tru

A scenario with Recyclerview nested Recyclerview is used. The first interface of the shopping cart is Recyclerview, and each item contains a store. Use Recyclerview in the item to include multiple items in a store or shop. Realize the idea: Use an interface callback to callback the listener event for a second adapter product selection to the first adapter and then back to mainactivity in the first adapter. Use an interface callback to callback the listener event for the first adapter item to

Author: slightboy, Time: 2006-10-14 Starting in: http://cs.alienwave.cn/Topic/329.aspx See a lot of students permission to judge is to use string and then or split or intercept In fact, to allow/disallow (True/false) This kind of permission, the logical operation is more appropriate Statement: This article is aimed at getting started and for the mastery of the students, if they already understand that can be ignored Perhaps the meaning of the expression is not very clear, please forgive me. In

Author: slightboy See a lot of students permission to judge is to use string and then or split or intercept In fact, to allow/disallow (True/false) This kind of permission, the logical operation is more appropriate Statement: This article is aimed at getting started and for the mastery of the students, if they already understand that can be ignored Perhaps the meaning of the expression is not very clear, please forgive me. Introduction to Logical operators: And:

Find a lot of trees on the internet to achieve, the total feeling is not satisfactory, not the need to reference JS external files using Plug-ins, is the code too much to see the dizzy, in fact, I just want to implement a simple code, logic is not complex tree, crap not to say more directly on the code: 1, first write the CSS style, the required to write the first rendering of the head Copy Code code as follows: 2, in the pa