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1. The match function wakes up the string with the specified regular expression function and returns the matching string prototype as an array: Stringobj.match (REGEXP) Parameter: Stringobj required option, need to go to match string regExp required option, The specified regular expression return value: If the G (Global match) option is not used, the first matched string, the location of the string, and an array of the original string are returned, and if the G option is used, an array of all ma

Original Address https://www.cnblogs.com/JetpropelledSnake/p/8982495.html http://www.runoob.com/python/os-walk.htmlThe Os.walk method is used primarily to traverse subdirectories and sub-files within a directory.Can get a ternary tupple (Dirpath, Dirnames, filenames),The first is the starting path, the second is the folder under the starting path, and the third is the file under the starting path.Dirpath is a string that represents the path to the directory,Dirnames is a list that contains the n

Recursive queries in SQL statements SqlServer2005 and Oracle two versions Before using Oracle, think of its recursive query is very useful, the study of SQL Server, found that it also supports recursive query in SQLTo illustrate:The SqlServer2005 version of SQL is as follows:For example, a table with ID and PID fields, ID is the primary key, PID represents its ancestor node, table structure and data:CREATE TABLE [AAA] ([ID] [int] NULL,[PI

] mac-authen[Njupt] mac-authen interface GigabitEthernet 0/0/1 to 0/0/24[Njupt] mac-authen username macaddress[Njupt] aaa[Njupt-aaa] local-user 7446a08fa396 password simple 7446a08fa396[Njupt-aaa] local-user 7446a08fa396 service-type ppp[Njupt-aaa] local-user 7446a09590f9 password simple 7446a09590f9[Njupt-

Written questions often have running results, and most of the body size is around the scope of expansion, the following summarizes several related questions: The outer variable function can be found inside the variable inside the function (local variable) outside the outer layer is not found. function aaa () { var a = 10;} alert (a); // error A is not defined because a is a local variable defined inside the function, the outer (global enviro

In RangeSet of Guava learning, we talked about the features and usage of RangeSet. There are many differences between RangeMap and RangeSet.On the official API of Google Guava, we can know that RangeMap is a collection type that does not intersection and is not an empty Range (key) map to a Value ). Unlike RangeSet, RangeMap cannot merge adjacent intervals even if the ing value is the same.Like RangeSet, RangeMap is also an interface that implements only two classes, mmutableRangeMap and TreeRan

own wrapper objects: the String number Boolean base type will find the corresponding wrapper object type, then wrap the object to give all the properties and methods to the base type, and then wrap the object to disappear Varstr = ' Hello ';String.prototype.lastValue = function () {return This.charat (this.length-1);}; Alert (Str.lastvalue ());o var str = ' Hello '; Str.number = 10; After the object is created, the wrapper object disappears immediately alert (str.number); New objects created by

are values, except that the pass-through reference is not a passing value.Start with a small example: Test yourself to see what the output of this program is? ） Copy Code code as follows: #include using namespace Std; Class Cexample { Private int m_ntest; Public Cexample (int x): m_ntest (x)//with parameter constructors { cout } Copy constructors, const in parameters are not strictly required, but reference symbols are required Cexample (const Cexample Ex)//copy constructo

Sysutils. Examples. encodedatesysutils. encodetimedateutils. Examples. Examples. encodedatetimedateutils. encodedateweekdateutils. example. tryencodedatetimedateutils. example. Example Unit unit1; interfaceuses windows, messages, extensions, variants, classes, graphics, controls, forms, dialogs, stdctrls; Type tform1 = Class (tform) memo1: tmemo; Procedure formcreate (Sender: tobject); end; var form1: tform1; implementation {$ R *. DFM} uses dateutils; Procedure tform1.formcreate (Sender

Data Types supported by jqgrid: XML, JSON, jsonp, local or clientside, xmlstring, and jsonstring, Script, function (...). JSON data Jsonreader needs to be defined to correspond to the data returned by the server. Its default value is: · Jsonreader :{ · Root: "rows ", · Page: "page ", · Total: "Total ", · Records: "records ", · Repeatitems: True, · Cell: "cell ", · ID: "ID ", · Userdata: "userdata ", · Subgrid: {root: "rows ", · Repeatitems: True, · Cell: "cell" ·} The data format returned by th

after "subnet mask, to limit 111.222.1.1 ~ For the IP address range 111.222.1.255, enter 111.222.1.0 and 255.255.255.0 In the subnet mask. For example, to disable 111.222.1.1 ~ For computer access in the 111.222.1.255 network segment, the network ID should be 111.222.1.0, And the subnet mask should be 255.255.255.0. Click OK to return.3. If you want to restrict a domain name, select "Domain Name" and enter the domain name you want to restrict below. For example, if the XXX.

Python's smtplib provides a convenient way to send emails. It encapsulates the SMTP protocol.The basic commands for SMTP protocol include:Helo identifies a user to the serverMail initialize mail Transmission mail from:RCPT identifies a single email recipient. It is often behind the MAIL command and can have multiple rcpt:After one or more RCPT commands, data indicates that all Email recipients have been identified and data transmission is initialized to end.VRFY is used to verify whether the spe

The date turns into a string. This is simple, but I believe many of my friends first met certain helpless. Four words in the brain: How does this turn? Directly on the code://获取系统当前时间NSDate *currentDate = [NSDate date];//用于格式化NSDate对象NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];//设置格式：zzz表示时区[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss zzz"];//NSDate转NSStringNSString *currentDateStr

ways, one is direct mail delivery, that is to say, for example, you want to mail to the zzz@163.com, then directly connect to the 163.com mail server, the mail to the zzz@163.com; the other is the verification of the Mail, the process is, for example, you want to mail to the zzz@163.com, you do not directly cast to 163.com, but through their own in sina.com anot

How to refresh the cache file I wrote a judgment in a loop (when the length of array a is less than 1, it will be executed once) into the cache operation, and vice versa, do not write data into the cache. The result is an incorrect result or the value of array a. It does not change. just how to refresh the cached file? How to refresh cached files In a loop, I wrote a judgment statement (once the length of array a is less than 1) into the cache. On the contrary, I did not write it into the cache

What do these two parameters mean: * args, ** kwargs? Why should we use them? Answer If we are not sure how many parameters will be passed into the function, or if we want to pass parameters in the form of a list and a group in the function, we need to use * args; if you do not know how many keyword parameters you want to input to the function, or want to input the dictionary value as a keyword parameter, you need to use ** kwargs. The args and kwargs identifiers are conventional usage. you can

NSDate Turn NSStringThe date turns into a string. This is simple, but I believe many of my friends first met certain helpless. Four words in the brain: How does this turn? Directly on the code://获取系统当前时间NSDate *currentDate = [NSDate date];//用于格式化NSDate对象NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];//设置格式：zzz表示时区[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss zzz"];//NSDate转NSStringNSSt

When the win7 dual-nic is connected to the Intranet and Internet at the same time, two default gateways may conflict, resulting in the two networks being inaccessible.Therefore, the solution is to configure only one gateway and use one static route for the other network. Step 1: configure the Internet Nic as normal. Configure the Intranet Nic. Note that the default Intranet gateway is left empty.Step 2: print the route and confirm that 0.0.0.0 is taken from the Internet gateway.If the current d