pluralsight training

. ————————————————————————————————(decimal)0.9 to 2 binary is infinite loop decimal 0.1110011001100110011 ...————————————————————————————————2) The computer has limited precision in saving floating-point numbers, such as float , which retains a valid number of 7 digits (binary bits ) in decimal . Double you can keep the decimal 15~16 bit ( binary the bits) valid numbers. The valid number is ignored. Why use binary?The power of the binary can correspond clearly to what the computer expresses.

voidwritedata (stringdata) {out.println ( "Write success");}// repair Seagate HDD public Booleandofix () {returntrue; }}//Samsung HDD classsamsunghddimplementssatahdd{//Samsung HDD Read Data publicstringreaddata () {return "data "; }//Samsung HDD Write Data publicvoid WriteData (stringdata) {out.println ("Write succeeded"); }}//a poor hard drive, unable to write dataabstractclassxxhddimplementssatahdd{//hard Drive Read Data publicstringreaddata () {return "data "; }}Interface is used as a typ

Topic Link: Click to open the linkFirst, the query is processed into Manhattan's smallest spanning tree.Then you can run violently on the tree.Can use MO team situation should be for inquiry [L,r], [l ', R '] cost must be ABS (L-L ') + ABS (R-R ')#include 2038: [2009 countries Training team] small Z socks (hose) MO Team Algorithm

Recently in reviewing data structure, by the way look at the time of the freshman write code, after reading more than at the beginning of a deeper experience.I hope these can provide some reference for beginners.Under the vc++6.0 can be run, at the beginning also wrote a lot of comments."Problem description"Constructs its corresponding two-fork sort tree with the input set of integers as the value of the keyword, and finds the value of the given point on the two-fork sort tree"Basic Requirements

the cross product: 1: The result is that A and B form the parallelogram area of the adjacent edge. 2: The result has a positive negative, there is a sin (a, b) and its angle, the angle is greater than 180 ° is negative. 3: Cross product does not meet the Exchange lawApplication: (1: Through the results of positive and negative judgment between the two vectors of the cis-counterclockwise relationship if a X B > 0 means a in the clockwise direction of b if a x B (2: Judge the zigzag turn, can be

= cin.nextint (); BigInteger ans = biginteger.one;for (int i = 1; I F-Calf re-warI am looking at the sample to guess, except that the number of 1 is all different or up to see if it is $0$. The reason is to study it in depth.#include G-Flood problem$ shaped pressure dp$.$DP [i]$ indicates that the number of digits divisible by the $i$ state can be divided by a few, and the number of digits that can be divisible by the state $i$ is calculated backwards, $DP [0]$ is the answer. Look at the code

It's mainly about rsync.On-Machine experimentand write some scripts.Here is the script for automatic backup#bak Site and logscd/var/html tar zcf/backup/www_$ (date +%f). tar.gz./wwwCd/app tar zcf/backup/logs_$ (date +%f). tar.gz./logs#bak SYS confCD/ tar zcf/backup/etc_$ (date +%f). tar.gz./scripts/bin/cp/var/spool/cron/root/backup/#rsync data to BakserverRsync-avzp/backup/rsync [Email protected]::backup/--password-file=/etc/Rsync.password#del data 7 days agoFind/backup-type f-name "*.tar.gz"-

Or is that sudo and su?When you log in with Su, add the following-Because of this, the environment variable will become the switch user'sThis can cause unnecessary trouble if you do not use environment variables.General Sudo is not allowed for remote logins, because passwords are plaintext and are very insecureBut you can use ssh-t [email protected] sudo-l this way to log inOkay, I'm done.20161129l04-09 old boy Linux OPS training-linux system user and

Sersync pressure test in the next sectionThis section focuses on the pressure test text of the previous section to do a real stress testTest out exactly what the sersync pressure limit is.From 10 to 100 per second# Tree |wc-l #查看写了多少文件# uptime #查看负载Here is the test script#!/bin/shcount=100While TrueDoFor ((i=1;iDo/BIN/CP 10k.jpg/backup/test/$i/10k_echo $ (date) $RANDOM |md5sum |cut-c 1-8.jpgDoneSleep 1For ((i=1;iDo/BIN/CP 30k.jpg/backup/test/$i/10k_echo $ (date) $RANDOM |md5sum |cut-c 1-8.jpgDon

precision.4. Startup script location for all services/ETC/INIT.D5, Uname-r U is worth the Unixname kernel version. This command can be used to view the actual kernel version.6, CD switch directory. Changedirectory's abbreviation.7. The directory where PWD prints. Printworking Directory pwd-p Print non-linked addresses.8, mkdir-m This m refers to the umask user rights. You can use MKDIR-M 711 filename to force permissions on a file.9. Mkdir-p create a directory recursively.10. Cp-p is copied wit

(XL) Lt1-2The problem is still not very difficult, but note the operator overloads so that sort, as well as the construction members, and the sort encounter vector iterator.Wrote two copies of the code.Attach your own common method first:#include #include#includeusing namespacestd;Const intmaxn= ++5;structsoldier{intb; intJ; BOOL operatorConstSoldier a)Const{ returnJ>A.J; }}; Soldier A[MAXN];intMain () {intN,kase=0; while(SCANF ("%d", n) = =1N) { for(intI=0; i"%d%d",a[i].b,A[I].J

connected components. the necessary and sufficient condition of the binary graph is that there is no odd circle, which can be obviously obtained: if a two-connected component is a binary graph, then the inside point must not be on the odd circle. If a two-connected component is not a binary graph, will the dots in it be on the odd circle?The answer is certain in the odd circle, the first two connected components is not a binary map, then there must be a singular ring C. There are two states fo

Issue: To write a spiral phalanx. The spiral phalanx form is as follows:1 12 11 102 13 16 93 14 15 84 5 6 7Set Row,column to represent row, column coordinates, the variable p from 1 to N2 p in order to the array A[row][column], to determine the row, colomn changes. The analysis is as follows: Introduce the variable k, the initial value is N. When the data is deposited to the lower-left or upper-right corner, K minus 1, which guarantees the output matrix. The introduction of the variable T, the i

motion = = Uieventsubtype.motionshake { var alertController1 = Uialertcontroller (title: "Congratulations, you've succeeded!") ", Message:nil, Preferredstyle:. Alert) var cancelaction = uialertaction (title: "Cancel", Style:.) Cancel, Handler:nil) alertcontroller1.addaction (cancelaction) Self.presentviewcontroller ( AlertController1, Animated:true, Completion:nil) } }This method is judged at the end of motion, and if motion is shaking,

Shareview = Shareviewcontroller () Self.presentviewcontroller ( Shareview, Animated:true, Completion:nil) } @IBAction func message (Sender:uibutton) { if Self.cansendtext () {let Messagevc = Self.configuredmessagecomposeviewcontroller () Presentviewcontroller ( MESSAGEVC, Animated:true, Completion:nil) } else {let Erroralert = Uialertview (title: "Cannot send", message: "Your device is not short Function ", Delegate:self, Cancelbuttontitl

Sometimes we can not put all the content in a page, we need to use the ScrollView, the extra content is scroll to get.First define the width and height, easy to fit the equipment.Let PageWidth = PageHeight = 800Then initialize a scrollview in the viewdidload:var ScrollView = Uiscrollview () scrollview.frame = Self.view.bounds scrollview.contentsize=cgsizemake ( CGFloat (PageWidth), CGFloat (pageheight)) scrollview.pagingenabled = True Scrollview.showshorizo

Link to original topicDescribeSmall fish spit bubble, toot toot out. Small fish will spit out two kinds of bubbles: Big bubble "o", Small bubble "O".Two adjacent small bubbles will melt into a large bubble, two adjacent large bubbles will explode.(Yes, you're right, little bubbles and bubbles don't make any difference, and I don't know why.) ）Note: Merge from left to right.For example: Oooooooo will become OO after a period of time.InputThe data has multiple groups and is processed to the end of

1. The task class represents a thread, and the simplest task is constructed by a parameter of Action2. You can also use the Task.Factory.StartNew method, which constructs a Task and starts running immediately. Equivalent to executing the constructor of a task with the Start method.4. Task5. To suspend the current thread, wait for a thread to finish, you can use the Wait () method of the execution thread, and the wait method has some overloads that specify the wait timeThe results are several, in

1, When making a table, it should be a line of drawings, that is, H3> Test array initialization and operationH3>TableId= "Carname"Width= "120px"Border= "100px">Tr>Td>noTd>Td>1Td>Td>2Td>Td>3Td>Tr>Tr>Td>carnameTd>TdId= "First">aodiTD> td ID= "second">benchitd> TD ID = "Third">bydtd> tr> table> Execution resultsIf the 2, JS and CSS statements can be separated into files, and then linked to the HTML file.src= "Myscript.js">script> "stylesheet" href= "Test.css"/> 3. CSS Box model4, Vscode Chinese g

property value in the controller for $scope,$scope. Q = {Name: ' m '}With the code above, we can implement the function of dynamic filter collection.4. Custom FilterOf course, the built-in filter can not meet all your needs, then you can engage, how to do what you want to do, you want to.Usually we can use the module's filter method to define one. As follows:Module.filter (Filtername,function () {return function (Input) {return;}});Let's start with a filter to add a string! No.First declare a s