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IOS development-UI (1) supplement UIWindow UIView UIlabel,-uiuiwindow

IOS development-UI (1) supplement UIWindow UIView UIlabel,-uiuiwindow I forgot to sort it out before. Now I want to add that I should put it in front Knowledge point: 1. Preliminary understanding of UI 2. UIWindow 3. UIView 4. UIlabel ====================================== Preliminary understanding of UI 1. What is UI (*) The UI is short for the User Interface. Uidesign refers to the overall design of man-machine interaction, operation logic, and be

C-language-scanf function supplement

About the scanf function supplement1 about "character" and "integer" Mixed input2 "integer" and "integer" Mixed inputTwo "integer" is written in one piece, must have For example: 1 and 1, if not split, it's 11.3 "After the project in actual combat, all separated by commas* When there are characters: scanf ("%d,%c,%d", a,ch,b); Input time: 23,a,3 print Out is: 3 A* No characters at the time: scanf ("%d%d%d", a,b,c); Input time:90C-language-scanf function supp

Nineth article: Network programming supplement and process

(hostname= ' 192.168.0.1 ', port=22, username= ' root ', Pkey=private_key) stdin, stdout, stderr = Ssh.exec_command (' df ') result = Stdout.read () print (Result.decode (' Utf-8 ')) Ssh.close ()(3) Upload or download files:#!/usr/binl/env python#encoding:utf-8#author:yangleiimport paramikotransport = Paramiko. Transport (' 192.168.0.1 ', ()) Transport.connect (username= ' root ', password= ' root123456 ') sftp = Paramiko. Sftpclient.from_transport (transport) Sftp.put (' Test.txt ', '/tmp/test

Linux Timing Task Supplement

/root #time sync by ZCL at 2017/5/8*/5 * * * */usr/sbin/ntpdate time. Nist.gov >/dev/null 2>1  Increased task frequency debugging tasks (some tasks cannot be used in a production environment)When debugging, the task execution frequency speed up a bit, such as: every minute, every 5 minutes to execute, or 5 minutes later than the current time, see whether the execution, is not according to your imagination to carry out, if normal no problem, in the need to change the execution time of the task.I

Problems with the gets function for a character array consecutively (buffer content supplement)

alternately press some characters, as follows:You keep pressing down and you'll notice that when you press the No. 4094 character, you're not allowed to continue entering characters. This indicates that the size of the row buffer is also 4 K.At this point you press ENTER to return the first character ' a ', such as:Continue tapping the ENTER key to output all other characters of the buffer, such as:3, standard error output without bufferingIf the error output is used:cerrThis statement is equiv

C + + string function supplement (type cross, split, merge, slimming)

() >= 2) { Result[tmparray[0]] = tmparray[1]; } } return result;}std::string stringutil::linkmaptostring (map{ Vector String tmpstr; Map for (; It!=tmpmap.end (); ++it) { TMPSTR = it->first+secondarysep+it->second; Tmparray.push_back (TMPSTR); } Return stringutil::linkarraytostring (TMPARRAY,PRIMARYSEP);}std::string Stringutil::trimfront (std::string data){ unsigned int i = 0; for (; I { } if (I Return Data.

python-day58 Django Introduction Template supplement, routing

Filter:1. built-in: Filter1.{{value|date: ' Y-m-d h:i:s '}}2 .....2. Custom Filter1. Create a new Templatetags (Python package) in the app2. Create a new py file with a name3. Internal definition An implementation provides specific function functions, which are registered in the Django template language in a fixed notation:From Django Import TemplateRegister = template. Library ()@register. Filter ()def add_sb (value):return value + ' SB '4. Restart5. Actual invocation1. The name of the new Py f

Java Basic Learning Supplement--Exception handling and log4j logs

throws to throw the declaration.Custom exceptionsCustom exception classes, you must base existing exception classesTypically, exception or runtimeexception are inherited, respectively, to declare a check-time exception and a run-time exception.and rewrite its getmessage () method.Use of log4j logsUse of log4j:1. Import Log4j.jar2. Create the Log4j.propetites profile under SRC peer3. Get a Log object through Logger.getlogger () in the class that needs to print the log4, respectively call differe

Knowledge System second time review supplement--Bubbling algorithm

Note: Time complexity: The time required to complete a program;Space complexity: The amount of memory required to complete a program;1. Bubble Sort: 22 comparison, if the previous one is larger than the latter, then the interchange position, after each cycle comparison, the last one is always the largest, the next round of comparison, it will not participate.Eg:function Sort (Array) {for (var i = 0; i for (var j = 0; jif (Array[j] > array[j+1]) {          var SMAP = array[j]; Assign a large valu

Javase: Multithreading Supplement--thread communication

handledClerk.addproduct (); } }}The same consumer I will not write in detail, and the same as above.publicclass Consumer implements Runnable{ ...... publicvoidrun(){ .... clerk.getProduct(); }}To write the Clerk class: Public class clerk{ intProduct//This is the shared data we are working on Public synchronized void addproduct(){if(Product >= -){Try{Wait ();//production of more than 20, we wait for consumers to take away the reproduction}Catch(){ ....

Python basic three-----Basic data type Summary supplement

1. A small problem:Deleting a list element during a loop will be different from the expected result, but will not cause an errorLis =[11,22,33,44,55] forIinchRange (len (LIS)):#When you use range () for the first time, the value is saved by default, and the value in the subsequent loop value is fixed to dead. Print(i)delLis[i]Print(LIS)delLis[1::2]Print(LIS) forIinchRange (0, 2): Print(I,type (i))delLis[i]Print(LIS)View CodeFor dictionary dict: Cannot delete dictionary key value pair durin

A little supplement to the SPRINGMVC controller

}") Publicstring Hello1 (@PathVariable string put) {returnput; }@RequestMapping ("/free/{put}") PublicString Hello2 (@PathVariable ("put") StringGet) { return Get; }Two methods:1. Pass the path parameter put to the method parameter put, note that the two put to be consistent, that is, the path parameter name is put, the function parameter name is also put;[Email protected] ("put") gets the value of the path parameter named put and passes it to the method parameter get, where the f

JS errors encountered at work (supplement at any time)

; } }) In this way, Google and Firefox can be compatible with the number of input restrictions. Of course, if the paste copy in the past can not be controlled, so after the loss should also do a check.2. About JS Digital size comparison problem:    1 var first = ' 1234 '; 2 var = ' second '; 3 Console.log (first This is because this is a string comparison, according to a letter-by-letter comparison, comparing the first letter 1, equal, the second letter 3>2, so true;Usually use jquer

Python Regular Expression Supplement

Cuiqingcai "Python3 Network crawler development Combat" finishingGreed and non-greedImport'Hello 12345678 word_this is a Regex Demo'= Re.match (' ^he.* (\d+). *demo$', content)print(Result.group (1))Originally intended to take out 12345678, butRun Result: 8Greedy match pattern:. * Matches as many characters as possible.. * After (\d+) match at least one number, no specific number specified. So. * Match as many characters as possible, match 1234567, and give \d+ a result that satisfies only 8 of

Knight Plan-python full stack 07 base data type Supplement

= {}2) dic = Dict ()3) dic = Dict.fromkey (key, value) #如果没有值, default is NoneTrap question TwoDic1 = Dict.fromkeys ([],[])print(dic1) dic1[1].append ('Alex ')print(dic1) #print(ID (dic1[1))) Print(ID (dic1[2)))print(ID (dic1[3)))Conversion of data typesint STR BOOL Three conversionsstr STR Dict.keys () dict.values () dict.items () list ()Tuple Dict---> Liststring conversion to list split# str---> List# S1 = ' Alex Wusir taibai '# L1 = S1.split ()# print (L1)# list ---> str the eleme

Python Full Stack development "supplement" the difference between the map function and the reduce function

① in terms of parameters:Map () Function:Map () contains two parameters, the first one is a function, the second is a sequence (list or tuple). Where a function (that is, a function of the first parameter position of a map) can receive one or more parameters.Reduce () function:The first parameter of reduce () is a function, and the second is a sequence (list or tuple). However, its function must receive two parameters.② from the numerical effect on the transfer in terms of:Map () is the function

Python Basic small knowledge point supplement and coding

)--->true string A word typeface multiply, out of the 20 range is the same two memory addresses: S1='h'* +S2='h'* +Print (S1 isS2)--->falseOther data typesThe list dic tuple set has no small data pool conceptTake list For example: L1=[1,]l2=[1,]print (L1 is L2)--- >falseCodingAsciiNo Chinese only English one byte (bytes) ==8 digit (bit)UnicodeEnglish: 32 bits 4 bytesEnglish: 32 bits 4 bytesUtf-8English: 8 bits 1 bytesEnglish: 24 bits 3 bytesGBKEnglish: 8 bits 1 bytesEnglish: 16 bits 2 bytes1.

Supplement to python-data types

' 1.int 2.str 3. Meta-zu tuple Tu = (' name ') TU1 = (' name ',) Print (Tu,type (TU)) Print (Tu1,type (TU1)) 4. List When you loop through a list, if you delete some or some elements in the loop, the number of elements in the list changes, causing the index to change and error-prone 5. Dictionary When a loop dictionary is deleted, if you delete some or some key-value pairs in the loop, the number of key-value pairs in the dictionary changes. Changes in length, error prone 6. Convert

In-depth understanding of JavaScript prototypes and Closures (18)-Supplement: Context and scope relationships

in the previous article, which is not covered here).Five, proceed to line 18th and call the FN function--fn (10) again. Generates the FN (5) context and presses the stack and sets it to the active state. At this point, however, the context of FN (5) is still in memory-there are two contexts in a single scope. Here, the emphasis has been told, and then the scene here will not repeat.The goal is to hope that we can use this example to clarify the context and scope of the relationship. Of course,

Python full stack day19 (function supplement)

One, depth copySee Copy day19-1.pyS=[1, ' Zhangsan ', ' Lisi '] #s2是s的拷贝s2 =s.copy () #打印s2和s是一样的print (S2) #修改s2s2 [0]=2# print S is the unchanged print (s) #打印s2因为修改了所以有变化print (S2) [1, ' Zhangsan ', ' Lisi '] [1, ' Zhangsan ', ' Lisi '] [2, ' Zhangsan ', ' Lisi ']If the modified element is a list, the source list also changes day19-2.pys = [[up], ' Zhangsan ', ' Lisi ']s3=s.copy () print (S3) print (s) s3[0][1]=3# modify S3 inside list element after source list also corresponds to change prin

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