single phase versus three phase

The inheritance mechanism in OC is single-inheritance, and a subclass can have only one parent classOC supports multilayer inheritance, a inherits Nsobject,b inheritance A which is called multi-layer inheritanceThe order of method calls in the inheritance system1. Find in your own class2, if not, go to the parent class to find3, if not in the parent class, go to the parent class4, if the parent class also does not have, it also looked up until the bas

Game interface: Single, no background picture Added the background End of game: No change No change Game history No Join database: have data record! Game initialization: No Add multiple modes The summary after this mission:After the last reply, and carefully watched the other group of students to complete the situation, I as the team leader, deep understand

1. Expected objectives of the projectA. Complete the basic functions of the gameB. Manual adjustment of Game difficulty playersC. The game can be run wellCompare with previous requirement analysis:The 1th difference is the difficulty of the game adjustment, the original is to choose the difficulty to adjust, but because of the difficulty of layering some differences and coding shortcomings, our group adopted the players themselves by entering the number of pictures and the number of pictures to

workload and complexity: Members Complete task (single task score) Team Contribution points Octanol Restaurant search functions (16), Integration (9) 55 Li Jing Specific Recipes page (24) 54 Liu Wencho Recipes List (19) 49 Zhao Zihao splash screen (8), main interface (10), recommended recipe frame (5) 53 Wang Yixiang

what the various parts of the HTML skeleton are for. 1.html Tags: a root node for all tags in HTML. 2.head tag: for storing title,meta,base,style,script,link. 3.title Tags: Let the page have a title that belongs to you. 4.body Tags: body section, for storing all HTML tags: P,h,a,img,strong ... such asThe next step is to learn a variety of label and tag attribute usage, which can be divided into double labels and single labels, helping to memorize and

/localtime------Time zone fileLocalectl list-locales---------List all languagesLocalectl---All parameters > List-keymaps set-keymap set-x11-keymap list-locales set-locale StatusCAL-Y CalendarTimedatectl----Time Zone command parameters >list-timezones set-ntp set-timezone set-local-rtc set-time StatusShutdown---Shutdown parameters >a,b two machines connected to the same computer hostW Command: Displays the user host and displays the executing action command.Screen command: Remote Assistance, shar

Microsoft will use the expanded version of Outlook instead of consumer network version Hotmail,outlook generally used in the enterprise. In other words, Hotmail is cooling, at least as a brand. To that end, Microsoft is ready to phase out Hotmail services and move to new Outlook brands. Microsoft has said it will turn Hotmail into a new Internet email service called Outlook.com, which has the same name as Microsoft's dominant corporate mail software O

Tags: Administrator technical Engineer Technical Systems Service Management PhaseLinux Administrator Technology--01. Wildcard characters * 、?、 [], {} function*: Any number of arbitrary characters?: Single Character[A-Z]: one of multiple characters or continuous range, omitted if none{A,MIN,XY}: Multiple sets of different strings, full match02. Use NMCLI to create a new connection and configure it with parameters such as a static IP address# NMCLI Con

Hello everyone, here I come again!! LA, I know you miss me very much, I want to quickly write more articles to improve their level, well, I am from you. Now come with me. Java Phase II, applause, applause!!!Chapter II:In this chapter, I'm going to tell you something. variables, common Java data types, variable naming rules, encoding specifications, data types, and variable names are used.(1) First introduce variablesVariables also have their own prope

C Language Conditional compilation and compilation preprocessing phase analysis and application summary (note)The C language is generated by the source code at the following stages:C source program, compile-and-preprocessing, compile-and-build, assembler, linker, executable fileIn the pre-compilation stage, the C source program is read, and the pseudo-instructions (the instructions beginning with #) and special symbols are processed. Or to scan the so

Ping An Technology Mobile Development Team 2 Technical weekly (Phase 3), Team 2 weeklyPing An Technology Mobile Development Team 2 Technical weekly (Phase 3) industry news 1) reply to AFNetworking security bug AFNetworking code maintainers respond to incorrect and misleading descriptions of the popular iOS network communication library AFNetworking exposed to the SSL Vulnerability.2) cross-platform mobile d

also began to appear new changes in the 2015 global smartphone shipments rankings, in addition to the first two Samsung and Apple, the third has become Huawei, and shipments reached 100 million, became the following Samsung, Apple, Nokia, the fourth in the history of a year to achieve 1 shipments Hundreds of mobile phone manufacturers.In the past, the ultimate single-product run of the King Millet, then ranked in the fourth place Lenovo, became the o

---restore content starts---Python Phase summary python installation:First we need to install Python software, the teacher sent an installation package directly click to download the installation, according to the number of computer-based choice to download 64-bit. After the installation is successful, choose Anaconda3 (64-bit) from "Start" to select Jupyter notebook The following screen appears, waiting will jump to the Web interface, it can be used.

hregionserver at any time. In addition, zookeeper also avoids a single point of hmaster problem.3) HmasterEach hregionserver communicates with Hmaster, and Hmaster's main task is to tell each hregion server what hregion it maintains.When a new hregionserver logs on to Hmaster, Hmaster tells it to wait for the data to be allocated. When a hregion crashes, hmaster marks the hregion that it is responsible for as unassigned, and then assigns them to othe

on two releases of Debian, programmers preferMint based on Ubuntu's derivative releaseRedHatRhel readhat Enterprise Linux Business EditionBecause it is used in the enterprise, the stability is very high. The release time is a new version every 18 months, and the software used is tested on fedora, so it's stable.CentosCentOS is an abbreviation for the Community Enterprise Operating system. Rhel source code re-compiled products, and so like Rhel, than other distributions, its stability is better.

provides some application-specific instructions based on the basic instructions. These directives are in the form of a specific application extension (ase:application-specificextensions).Whether a processor implements some kind of extension. Can be specified by setting the standard configuration register. The basic extensions are enumerated for example below. MIPS 16e: Designed for embedded systems and limited storage space applications, the ability to run 16-bit and 32-bit mixed-lengt

region:#hbase> major_compact ‘r1‘, ‘c1‘#Compact a single column family within a table:#hbase> major_compact ‘t1‘, ‘c1‘ Configuration Management and node restart1) Modify the HDFs configurationHDFs Configuration Location:/etc/hadoop/conf # 同步hdfs配置cat /home/hadoop/slaves|xargs -i -t scp /etc/hadoop/conf/hdfs-site.xml [emailprotected]{}:/etc/hadoop/conf/hdfs-site.xml#关闭：cat /home/hadoop/slaves|xargs -i -

WHERE acreage = N or acreage=500 or acreage=600;(7) Use of like and wildcard characters_: Takes up a single character.%: multiple characters to matchSELECT * from Pj_appoint_order WHERE user_name like '% brother 'SELECT * from Pj_appoint_order WHERE user_name like ' _ Brother _ '(8) In general, the query value is NULL, but it will exist, query null needs to beSELECT * from Pj_account where score is null;SELECT * from Pj_account where score are NOT nu

Egrep to remove the directory name of the path above# echo "/etc/rc.d/init.d/functions" | Egrep-o '. */'14. Count the number of logins per host IP address that was logged in as root in the last command# Last |grep-eo "([0-9]|[ 1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]) \.) {3} ([0-9]| [1-9] [0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5]) "|sort | Uniq-cNote that the double brackets on the previous match do not appear to be three. There are only 1. The following should also have (), grep when using the n

or Autorelease to release objects, and the second is, in addition to Alloc, Objects created outside new and copy are Autorelease, and the third who retain, and who releases them.2.3 Some language featuresOC First is only a single inheritance, no multiple inheritance.Property access, @property plus @synthesize can automatically generate setter and getter methods after use.Category, Chinese is generally called a class, he is able to provide new methods