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115 Java Interview Questions and answers-ultimate list (I), 115 java Object-Oriented Programming (OOP) Java is a computer programming language that supports concurrency, class-based, and object-oriented. The advantages of object-oriented software development are listed below: • Code development is modularized to facilitate maintenance and modification.• Code reuse.• Enhance code reliability and flexibility.• Increase the comprehensibility of the Co

var arr = [ isarrayfn Function--(obj) { // encapsulates one of the functions if ( typeof Array.isarray = = = "function"return// browser support use the IsArray () method } else{ // Otherwise use the ToString method return Object.prototype.toString.call (obj) = = = "[Object Array]"The ultimate solution for judging arrays

cookie, it must be encoded with Base64 and sent to the client's browser to enter the storage.The next time the client browsing access is the value of the cookie that is brought back, it is Base64 encoded, so it needs to be decoded by Base64. BASE64 encoding is mainly to solve the re-encoding of special characters, encoded into a-B, a-B, 0-9, + and/, character 52, 10 digits with a +, A/a total of 64 characters. Its principle is to encode the original 3 bytes of content into 4 bytes. The main is

settings, click Environment variables, click Path, and then click OK with our Python installation path. It is indicated by a picture:The problem to note in this process is that when you add a path path, you add a semicolon to the last side. Now that we have entered "Python" in the browser again, we can access the command directly from the console:In the second step, we install PIP. We also need to download on the official website of Python: https://pypi.python.org/pypi/pip#downloads:　After the

chain is Proro, not prototype.Therefore, if you specify dog in this way. Proto = animal. That Dog.price = 2000.The final metaphor, though not very precise, may help with the understanding of the prototype.Father (Function Object), Sir, a big son (prototype), that is your eldest brother, father to your eldest brother bought a lot of toys, when you were born, the relationship between you (Proto) will let you naturally have your eldest brother's toys. Likewise, you, the older son of yours, buy a l

This article mainly introduces the simple documentation of Seajs, which provides a simple and ultimate modular development experience. Non-official documentation is used to organize the text and examples of your own official documents for convenient fast query. You can refer to unofficial documents to sort out the text and examples of your official documents for quick query. Why is Sea. js used? Sea. js pursues simple and natural code writing and org

++-mode-hook ' Global-company-mode);; Ycmd (Require ' ycmd) (Add-hook ' C++-mode-hook ' Ycmd-mode) (set-variable ' Ycmd-server-command ' ("Python"/home/dean/ Work/software/ycmd/ycmd ")) (Set-variable ' ycmd-extra-conf-whitelist ' ("/home/dean/work/gitlab/gitlab.com/ cppwizard/console/* ")) (Require ' Company-ycmd) (Company-ycmd-setup)Configuring a dedicated Ycmd file for C + + engineeringThe file can be copied from the Ycmd example directory, called. ycm_extra_conf.py, and put it here./home/dean

Windows 7 Ultimate Goal: Eliminate the linux operating system-general Linux technology-Linux technology and application information. For more information, see the following. Source/eNet power in Silicon Valley The release date of Windows 7 is getting closer and closer, and it is widely believed that Windows will become the terminator of Linux because it will replace Linux as netbooks) and end the hope of Linux on the desktop. However, I think Windo

Vmware prompts kernel headers for the ultimate solution when installing the centos System for virtual machines The most intuitive way to install kernel headers is not good, so enter the command: Yum install kernel-headers However, after the installation is complete, the system prompts the need for kernel headers when re-installing vmware-tools. What should I do? Do not worry. Enter the following command: Yum install kernel-devel After the install

The ultimate solution similar to QEventLoop: Cannot be used without QApplication appears in the Qt program Release version. cannotdowithout Recently, I am working on Qt program development. There is no problem in running the program under Debug. After the program is released to the Release version, there are various problems:Various inexplicable errors are reported. Similar errors include: QEventLoop:Cannot be used without QApplication QObject::con

sgr0 The cause of linux Command garbled is SSH, because cat uses a sample file on other terminals and does not produce garbled characters, so the cause of linux Command garbled Oracle @ linux-suse: ~> ^ N If you use ctrl + v and ctrl + n, the linux Command on the screen is garbled. Of course, try again after recovery. Oracle @ linux-suse: ~> Echo-e '\ xe' The screen is garbled again. OK, recover again. Oracle @ linux-suse: ~> Echo-e '\ xf' The above needs to be played blindly, because the linux

(); startY = (int) event. getY (); break; case MotionEvent. ACTION_MOVE: break; case MotionEvent. ACTION_UP: endX = (int) event. getX (); endY = (int) event. getY (); judgeDirection (endX-startX, endY-startY); if (isMoved () {addRandomNum (); // modify the display score Game. getGameActivity (). setScore (Config. scroe, 0);} int result = checkCompleted (); if (result = 0) {if (Config. scroe> highScore) {Editor editor = Config. sp. edit (); editor. putInt (Config. KEY_HighScore, Config. scroe);

Euclidean Algorithm gcd and its ultimate explanation This problem has plagued me for a long time. I finally found an explanation, and I made some changes myself. I will certainly be able to deepen my understanding after my patience. Extended Euclidean algorithms-solutions for indefinite equations, linear homogeneous equations. When two frogs meet each other after step s, the following equations must be met: 　　　　(x+m*s)-(y+n*s)=k*l(k=0,1,2....) Slightl

different from rhel, centos and so on are using O2 debian using OS I suggest if you compile the kernel or change it to OS for the main kernel, or debian kernel, rhel or O2, this type of release version makes great changes to the kernel, basically breaking away from the standard main kernel ..... As for the O3 or Ofast level, if you are not crazy, you can't see the effect. If you are not crazy, it will also reduce the performance and cause errors .... The above tests are all conducted in debian6

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Reason Analysis: If the prompt is: 0x000000ed error. This indicates that the computer's hard drive has caused the failure. In general, it may be a sudden power outage, or the host has a collision, hard disk data cable loose, etc., will cause hard disk failure. Workaround: It is best to repair the hard disk to prevent the next occurrence of such problems or loss of files The specific repair methods are as follows: Step one: Enter the BIOS setup settings and invoke the BIOS default settings.

Http://www.cnblogs.com/caimuqing/p/7065694.htmlProblem Description:Use Webpack to package Vue project, use Font-awsome font, found after packaging, font-awsome icon is not displayed, error is path is wrongLooked under the package path, indeed the path is not correct, after packaging font-awsome files are stored under static/fonts/, and access to the time static/css/static/fonts/The reasons are:Build > Webpack.base.conf.js inside Loader settingsLimit value to be set to a larger size, at least lar

No mapping found for HTTP request with URI This problem occurs because the configuration is wrong in Web. XML, such as: 　　SPRINGMVC show no mapping found for HTTP request with URI the ultimate solution

visibleFramelayoutparams.height = usableheightsanskeyboard-heightdifference; }Else{//keyboard probably just became hiddenFramelayoutparams.height = Usableheightsanskeyboard; } mchildofcontent.requestlayout (); usableheightprevious = Usableheightnow; } }The above code adds a "Heightdifference > (USABLEHEIGHTSANSKEYBOARD/4)" judgment, this is to remove unnecessary interference. Because there are many reasons to trigger the Ongloballayout event, it is not only the pop-up chang

Note1: The recommendation of net fly tends to the long tailNote2:Symbolic School: Reverse deduction, seeking insight from philosophy, psychology and logic--reverse deductionConnection School: Reverse analysis of the brain, from neuroscience and physics---Reverse propagationEvolutionary school: Simulating on a computer, using genetics and evolutionary biology---genetic programmingBayesian School: Probabilistic reasoning, theoretical basis is statistical---Bayesian inferenceAnalogy School: Extrapo