Complex and Legacy database schema

This paper mattered meters alongThis address: http://blog.csdn.net/sushengmiyan/article/details/50414652In this chapter, we focus on the most important part of your system:the Databaseschema, where your collection of Integrit Y rules resides-the

Use USB WiFi (RTL8188CU/RTL8192CU) under ORANGEPI-PC, Ubuntu Trusy Mini

ORANGEPI-PC + ubuntu 14.04 natively supports firmware reading, the reason why the RTL8192CU firmware is not loaded is because ORANGEPI-PC's Ubuntu 14.04 (trusty) No firmware providedAll we need to do is copy firmware from somewhere else to

Linux_note Command Grep,sed,awk

1. grep filters out the specified linegrep [-CINVABC] ' word ' filename--color the match to the key words in red logo such as: # grep--color ' root '/etc/passwd-C: Print the number of lines that meet the requirements-I: Ignore case-N: Output with

The practice of American Mission recommendation algorithm

ObjectiveRecommender systems are not new, they exist long ago, but the referral system really goes into people's sights, and as an important module exists in various internet companies, or in recent years.With the development of Internet, more and

How to quickly extract data from MONGO to NumPy and pandas

MONGO data is often too large to be put into memory for analysis, and if a dictionary is used to store each document directly in Python, the use of lists for storing data will soon be covered with memory. Models with NumPy and

"Reprinted" Kafka High Availability

Http://www.haokoo.com/internet/2877400.htmlKafka in versions prior to 0.8, the high availablity mechanism was not provided, and once one or more broker outages, all partition on the outage were unable to continue serving. If the broker can never

Aircrack-ng Wireless Hack Summary

Test environment under the Linux platform, I use the Ubuntu environment. Ubuntu installation can be directly with sudo apt-get install Aircrack-ngLinux should be able to be installed with yum-y install Aircrack-ng, if you download its installation

Analysis of two methods for three-dimensional reconstruction of OSG: Triangular Patches (osgutil::D elaunaytriangulator) and four-corner patches (Osg::heightfield) (2)

Perform very basic Sanity-check validation on a heightfield.BOOL Validateheightfield (osg::heightfield* HF){if (!HF)return false;if (Hf->getnumrows () getnumrows () > 1024)return false;if (Hf->getnumcolumns () getnumcolumns () > 1024)return false;if

SWF Obfuscation tool (intelligent extraction of fields that need to be confused)

Here is a SWF obfuscation tool, which is now open source project on open source China git mixswfA few days ago want to confuse their own projects, but the Internet to find the obfuscation tool to fill out the field needs to be confused, and confused

The new Year is all about money search Xinxiang leaf buckle pick up fast PayPal and Money method

Gagin leaves Buckle 791059291 , you can receive the latest technology video FREE!!! Fast New Year, a year again such a head!As a child always look forward to the new year, because there will be fresh Spring Festival wear, you can have a lot of

(7) Hadoop-based Simple network disk application implementation 3

First, the login.jsp landing interface to extract the Bootmetro-master.zip, and then copy the assets directory under \bootmetro-master\src\ to project.Bootmetro:https://github.com/aozora/bootmetro, instruction for use:

How front-end and back-end work together

Our process is such that the backend provides the data interface, or interface documentation.Then our front desk carries out the razor template data logic nesting or html,css,js the entire process development.The disadvantage is: the workload is

Git using the Operations Guide and GitHub

This article records the use of Git to organize the scattered memories together. and describes the use of GitHub.The use of Git represents a mindset and a situation that, compared to SVN, is not so much a technical difference, but rather a new

Data cleaning: Decode using the sign function to make small value judgments

BackgroundWhen processing a business data, it is necessary to determine the size of the two data fields and keep the large data below the specified fields. Consider using the Decode function and the sign function for this purpose.Solution1, decode

Hacking events ringing network security alarms

Hacking events ringing network security alarms(Forwarded ... )22nd this month, Weibo topic # E-commerce in the face of hackers lost millions # sparked a hot debate. It is reported that the event is the first social e-commerce show Ah, the app in the

If,if,if,if .... Please, the dense if statement.

int index; if (index = = 0) { NSLog(@ "11111"); }Else if (index = = 1) { NSLog(@ "2222222"); }Else if (index = =3) { NSLog(@ "3333333"); }......Do we see this kind of code that looks like a little eye ache? If it is you, how will you

STM32 using active buzzer to realize alarm clock sound

The sound of the active buzzer is fixed, the operating voltage is constant, changing the time of the power off to obtain a different length of sound, such as continuous, fast short, slow long sound (similar to Morse Telegraph) to distinguish

5.3.2 Counter Object

the Counter class provides a convenient and fast statistical tool. Example:#python 3.4Import CollectionsCNT = collections. Counter ()For word in [' Red ', ' blue ', ' red ', ' green ', ' blue ', ' Blue ']:Cnt[word] + = 1Print (CNT)The resulting

Design of S3C2440 resistive touch screen driver

Design of S3C2440 resistive touch screen driver Experiment: When the pen clicks on the touch screen, SecureCRT displays the X and Y coordinates of the contacts; Objective: To test the resistance touch screen driver; Development Board: S3C2440   /**

The Hyper-V manager in the cluster cannot remotely manage VMS on other nodes/migration exceptions.

The Hyper-V manager in the cluster cannot remotely manage VMS on other nodes/migration exceptions. In the production environment, due to various factors, there may be potential unknown risks of "planting trees and filling traps for future

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