also add points:Zincrby rank:20150401 1 2Zincrby rank:20150401 10 3Look at the data in the ordered set rank:20150401 now (withscores parameters can be shipped with score of the element):Zrange rank:20150401 0-1 Withscores1) "2"2) "1"3) "1"4) "5"5) "3"6) "10"To obtain TOP10 from high to low scores:Zrevrange rank:20150401 0 9 Withscores1) "3"2) "10"3) "1"4) "5"5) "2"6) "1"Because there are only three elements, the data is queried.If you record that day
The "potential fan rank TOP10" is based on the number of comments forwarded by all non-fans to your comment, and ranked according to the cumulative number of comments forwarded and screened out the Top10 of non fans. These people are not your fans at the moment.
If you want to see the details of a potential fan, just click on the user's avatar or name to be able to access their home page for viewing.
Hardcore fans include fan TOP3 analysis, active fans, and fan Butler related content.
Fan TOP3 shows the people who most often comment on and forward your blog in the last four weeks, and the number of trends.
Active fans refer to users who are among your fans, often online/logged in. The bigger the heart, the more fans he has, the more they can be viewed by clicking on their tweets.
This week and last week, the fan Butler showed me commenting on my blog and forwarding a number of top
increase of an order of magnitude, O (N), but not only the time complexity of the optimization, the method only need to IO data file once, and the algorithm 1 more than the number of Io, so the algorithm 2 than the algorithm 1 in engineering has better operability.Step two: Find Top 10 (Find out the 10 most occurrences)Algorithm one: normal sort (we only use to find Top10, so all sorts have redundancy)I think for the sorting algorithm everyone is not
IEEE Spectrum Statistics The usage prevalence of major programming languages based on the following data sources.
1) Google search results2) Google trend analysis3 Twitter (what is this thing??) )4) GitHub Library5) StackOverflow Question and answer6) Reddit Articles7) Hacker News8) Career Builder9) Ice JobIEEE Journal PapersWait a minute.
The following data were obtained:
1 IEEE Spectrum Major languages total list Top 20
1.Java2.C3.c++4.Python5.c#6.PHP7.JavaScript8.Ruby9.R10.MATLAB11.Perl12
obtain TOP10 from high to low scores:
Zrevrange rank:20150401 0 9 withscores
1) "3" 2
) "Ten"
3) "1"
4) "5"
5) "
2" 6 "1"
Because there are only three elements, the data is queried.
If you record that day's score list, then the other list is simple.Like "Yesterday's standings":
Zrevrange rank:20150331 0 9 Withscores
Achieve the "Last week's standings" by using the combined set to realize the sum of many days ' points:
obvious benefit in using internal self-monitoring, when the average response time of the system suddenly slows down, and we open the log to quickly locate what exactly is the problem. A few months ago in our application, the use of a cache component called Hazelcast, the JVM without any indication of oom, and by our operational system automatically restart, we open this log, positioned to be hazelcast operation timeout, and soon, we have the next move.
With the performance-monitored log files,
the existence of TOP1, the query optimizer uses 1 as the estimated number of rows, and the actual number of rows varies greatly, so for this case, using top can result in higher costs (although we see the estimated 0% vs 100% in Figure 4, but the actual difference is huge), as shown in cost 5.Figure 5: Using top instead results in performance degradationFor the above scenario, we can usually have the following centralized workaround:1. Using hints, since we know this is due to the fact that the
optimization, the method only need to IO data file once, and the algorithm 1 more than the number of Io, so the algorithm 2 than the algorithm 1 in engineering has better operability.
Step two: Find Top 10 (Find out the 10 most occurrences)Algorithm one: normal sort (we only use to find Top10, so all sorts have redundancy)I think for the sorting algorithm everyone is not unfamiliar, here is not to repeat, we should pay attention to the sorting algori
MySQL service username. The VNC service uses a password to provide Remote Desktop access to password.0x07vulnerable Web ServicesMetasploitable 2 pre-installed intentionally vulnerable web applications. Boot metasploitable 2 o'clock, the Web server starts automatically. To access the Web application, open a Web browser and enter the URL/HTTP//Steal a pictureThere is a point of knowledge:192.168.56/24 is the default "host only" network in virtual box. The IP address is assigned starting from "101
EXP9 Web Security Fundamentals 20154305 Qi Shuai One, the experiment requires the objective of this practice to understand the basic principles of commonly used network attack technology. Webgoat in practice related experiments:
FQ
Webgot
Burpsuite
Injection Flaws
Cross-site Scripting
Ii. practice Process 1. Installing WebgoatWebGoat是由著名的OWASP负责维护的一个漏洞百出的J2EE Web应用程序,这些漏洞并非程序中的bug,而是故意设计用来讲授Web应用程序安全课程的。这个应用程序提供了一个逼真的教学环境
browser to obtain information such as its cookie. Instead, CSRF is borrowing the user's identity to send a request to Web server because the request is not intended by the user, so it is called "cross-site request forgery".
The defense of CSSRF can be carried out from a few aspects;
Referer, token or verification code to detect user submissions;
Try not to expose the user's privacy information in the link of the page, for the user to modify the deletion and other operatio
click, B borrows the identity of a for illegal operation, that is, B has the permission of a.
Defense: 1.cookie storage time should not be too long; 2. The server requires the user to enter the corresponding verification code; 3. The server tries to use the Post method in the formSecond, the experimental process record
Open Webgoat
It's a bit of a thrill to see everyone else getting crazy about installing the JDK. Finally realized what is called the ancestors planted t
of the input point, the corresponding location of the database has been replaced. Tips:
Do exercises
Do not blindly brush the hole, jump out of the comfort zone broken read:
Today, with Ziwei, the harvest is still very big.
In getting a station, infiltrating the train of thought. Sub-domain name mining: sub- Domain excavator
Compare network occupancy
Online sub-domain name mining tool
Why would you do that?
Because the general main battle protection is better, so generally can from the side sta
Pixy
Php
Open source
\
Finding XSS and Sqli vulnerabilities
http://pixybox.seclab.tuwien.ac.at/pixy/
Mike
Java
Open source
\
Java source code security scanner built on the top of Orizon.They are connected to OWASP.
Http://milk.sourceforge.net/download.html
Smatch
C
Open source
\
\
http://smatch.sourceforge.net/
Oink
C++
Open source
1.Mitmproxy
Mitmproxy is an HTTP proxy tool that can be used for man-in-the-middle attacks or for HTML scratch-wrap debugging
2.BP
Use more, do not describe
3.owasp-zap
Zed Attack Proxy is Zap, is a simple and easy-to-use penetration testing tool, is to discover the flaw in the Web application is a sharp weapon, is the penetration test enthusiasts good thing.
4.Paros
Parosproxy, this is an agent that evaluates Web application vulnerabilities, a java-b
services to improve the reliability of the network. But at present, most of the small and medium-sized sites are hosted in the form of a virtual host, to improve the security of the site, reduce the risk of hacker attacks, webmasters should be timely to their own web site procedures to play the latest patches, in the development of the time should strengthen security awareness, pay attention to prevent injection loopholes, At the same time, the site hosted in the technical strength, high saf
professional equipment, the other is towards the Web application integrated Gateway development. Barracuda Technical Director Optics the traditional firewall and Web application firewall, he believes that the traditional firewall and Web application firewall, the essence of the difference is that the former is only for the network protocol of the third layer of network layer, layer fourth transmission Layer access control and attack defense, The latter, which went deep into the application laye
(column_name)from+information_schema.columns+where+table_schema%3ddatabase()+and+table_name%3d0x676f6f6473+limit+0,1),1,1)=0x69,1,0x00)) 正常/?order=(select+1+regexp+if(substring((select+concat(column_name)from+information_schema.columns+where+table_schema%3ddatabase()+and+table_name%3d0x676f6f6473+limit+0,1),1,1)=0x68,1,0x00)) 错误Sqlmap TestIt is possible to detect injections without filtering, such as:Appendix Service-Side Codeuse sqlidemo;create table goods (id int(4) not null primary key auto_i
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