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1, pipleline Add the following code: (after the data crawl after the URL into the Redis to heavy) Class Redisinsert (object): def process_item (self,item,spider): set_redis_values_1 (item[' url ') Return item 2. Middleware Add the following code: (see if the URL crawled before crawling the data) Class Ingorerequestmiddleware (object): def __init__ (self): Self.middlewarelogging=getlogger (" Ingorerequestmiddle

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. Otherwise, the result array is storedif (This.indexof (this[i]) = = i) N.push (This[i]);}return n;} 4//Array to Heavy The code is as follows Copy Code Array.prototype.distinct = function () {var filtered= [];var _a = {};for (var i = 0;iif (!_a[this[i]]) {//if already available, no longer added_a[this[i]] = 1;Filtered.push (This[i])}}return filtered;}; Finding indexes by the method of binary Division

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failure. Because of this, you may need to pay more and more attention to all your project contracts (to ensure that each task is completed on time and in accordance with the time stipulated in the contract). In addition, the authors suggest that you should think more about the quality of the product, because many web designers are heavy quantity but not quality, which is clearly wrong. Reject Temptation Whether you are a web design experienced Dani

It is reported that last night (May 31 night) Baidu again carried out a new round of K station, some Taobao guest API station heavy losses. It is understood that the site of the K is included in the basic hundreds of thousands of, millions, most of the site was K-light, and some included also have nothing left. At the same time, there are some sites are safe, even a little reaction is not. The author boldly analyzes the main causes of this phenomenon:

Tags: row_numberTransferred from: http://www.maomao365.com/?p=4942The function of the **row_number function in the database is to generate a number for each row according to a certain rule, we often use this property, the table paging operation, the following we will describe the use of the Row_number function to delete the table repeating data row * */*建表*/create table A(keyId int,info varchar(200))go /*生成数据*/insert into A(keyId,info)values(1,‘a‘),(2,‘b‘),(3,‘C‘),(4,‘d‘),(5,‘e‘),(1,‘a‘),(21,‘b1

(info1 ))))METHOD2: Has %>% group_by (ID)%>% summarise (name = toString (sort (Unique (INFO1) )))--------------------------------------------------------------------------------------------------------------- -----------------------Require (data.table)METHOD1: Setdt (have) [,. ( Info1 = toString (sort (info1))), by = ID]METHOD2: Setdt (have) [,. ( Info1 = Paste (Unique (info1), collapse = ",")), by = ID]Note: The paste function cannot be used as an argument to other functions. For exampleAggreg

filesInnodb_flush_log_at_trx_commit = 1#设置日志可以使用的最大内存空间Innodb_log_buffer_size = 8M#设置日志可以使用的大小Innodb_log_file_size = 256M#以循环方式将日志文件写到多个文件Innodb_log_files_in_group = 3#用来控制在 InnoDB Buffer Pool can be used without writing the scale of the dirty Page in the data file (dirty data that has been repaired but has not been written to the data file from memory)innodb_max_dirty_pages_pct = 90#innodb的这个锁等待超时时间Innodb_lock_wait_timeout = 120[Mysqldump]Quick#消息缓冲区的大小Max_allowed_packet = 16M[MySQL]#不使用自动补全No

There are two ways to use it:1. Single Statement method:1) Delete b from Sys_test B, (select *,max (UUID) from Sys_test Group BY ' name ' have count (' name ') > 1) as D where B.uu Id>d.uuid and b.name = D.nameDelete b from Sys_test B is a set alias, the DELETE statement is generally directly connected to the from, when the need to set the from table alias is, the alias needs to be placed before the from, indicating that the deletion is the content of the alias is deleted.From the different tabl

Label:MySQL SQL statement, count this keyword can be in the number of statistics, such as There is a TableA table with the following data in the table: Id Name Age 1 Tony 18 2 Jacky 19 3 JoJo 18 SELECT COUNT (age) from TableA The above statement can find out how many data are in table tables. The query result is 3 While the Count keyword is used together with distinct, you can count

Method overload (override)/method override, magic function implementation, and heavy-load magic Method overloadDifferent function names use different numbers or types of functions to call the same function name, but different functions can be distinguished.Class {Public function test1 (){Echo "test1 ";}Public function test1 ($ ){Echo "test1 hhh ";}} Heavy Load$ A = newA ();$ A-> test1 ();$ A- gt; test1 (222

17. C # type judgment and heavy load decision-making (Chapter 9 9.4 ), Let's end Chapter 9 today, which we often ignore, but the compiler will help us complete "type judgment and heavy load decision-making" and understand how the compiler can help us complete it, I believe that it will be clearer when writing code to avoid compilation errors and troubleshooting, making development more powerful. We know tha

Transferred from: http://www.gamelook.com.cn/2015/08/225874Gamelook reported/At the beginning of May this year, Gamelook has reported a "Wardragon (War Dragons)" Strategy hand tour, the leisure Hand Tour developer Pocket Gems production of SLG with real-time synchronization play and 3D screen won a lot of praise, The highest ever reached the 16th place in the US iphone income list. The lack of ' core ' game research and development experience led to a number of problems with the Wardragon, which

After a year, the Austrian Wei Power-bi heavy re-push the new version, in the previous V10 Web visualization front-end analysis tools, based on a more user experience this piece. V11 stands at the user's point of view to design and develop a new version of the user's vision, and is optimized for the optimization of the front-end framework, the experience of the mobile device, and the dynamic View and free version optimization four. Let's take a brief

In some dynamic operations, we do not need to constantly call a function to complete some functions, such as the number of words in the input, we do not have to enter a variable statistics once, but can be counted at a time, such as scroll scrolling events, if we just need to know the distance of scrolling, There is no need to listen to scroll events in real time and listen to them once in a while.Here we introduce a function that can solve this problem. The code is as follows:1 //returns a func

, recommended.Fourth: Judging by order detail dataHow to do this: request the order details of the corresponding order, directly set the response assertion (ex: "Status": 4) to judge.This kind of judgment, same concise, also only need to set the assertion in the request response, and guarantee the uniqueness of the order, there is no other order interference situation occurs, it is recommended to take this approach.PS: In the process of solving the problem, but also tried other methods of verifi

Safe Dog Year-end Thanksgiving big feedback activities began, thank you for the new and old users of our support, and now while the advent of the two, in order to thank everyone's love, we specifically launched a heavy Thanksgiving activities, gifts are many, there are apples, there are millet, mobile power, there are mobile phones, there are digital cameras, this holiday wayward up! Duration: December 22 to December 31First Weight:New Year double red

When I was a child, the teacher taught me that the format of the diary should be the date followed by the weather. Now I think there is really no reason to write down my diary. What is the relationship with the weather of the day? We should note that the mood index of the day is similar" Let me talk about it two days ago. It's a day of rain or heavy rain, and it's not until the evening. It may be that the last half month was too serious for sleep.

If she had no class today, she would accompany Huang Bo to guicheng to help Tom with things. At this time, she did not know what the situation was like. In the car, I accidentally saw a "jetant" Bicycle monopoly, and told Huang Bo that he liked all the people who went to Singapore. recently he was quite depressed. Haha, I want to learn from him. The Moho in guicheng is really tnnd expensive, and it costs 3 yuan for two kilometers. How can I not step on a bicycle ?! When I came back, I went th