birchbox founders

Beginner MySQL Small white, for the first time to write a blog, in order to allow themselves to remember more profound, but also a small white angle to explain the experience and difficulties of beginners, but also a record of their own growth pace barMy first time using MySQL is on Ubuntu, now using the Red Hat branch of the Linux CentOS 7, installed to find usually is mariadb to replace MySQL, through the data query found that MARIADB is one of the branches of MySQL, A version of the MySQL bra

query performance data, enabling developers to analyze and filter patterns that may interfere with critical system resources. In general, in the power of the open source community and the competition of Oracle system, MySQL itself shows the trend of accelerating development, perhaps in the Oracle system MySQL becomes more complete, more stable, more commercialized, the branch version of the community more open, with stronger key performance, Perhaps these two parallel paths of development can c

One of the main language developers of PHP, one of Zend's founders, Andi Gutmans recently bluntly criticized the Java language in his blog. He points out that the way Java vendors are trying to provide dynamic language implementations on the JVM is simply not right, Java has lost the war on Web development language, and PHP is the de facto standard and winner.Gutmans's article in the technical community sparked a strong controversy, very different vie

I. OGG overviewOGG Full name Oracle Golden Gate.History:Established in 1995 in San Francisco, California, Golden Gate is named after the Golden Gate Bridge known as San Francisco. Two founders Eric Fish and Todd Davidson were originally designed to design a fault-tolerant system for tandem computer, which was used by banks to send transaction data from ATM networks to IBM mainframes due to the robustness of Golden Gate and the excellent data replicati

association rule belongs to single-dimension, single-Layer and Boolean association rules in classification. In this case, all itemsets with support degrees greater than the minimum support are called frequent itemsets, or frequency sets.5. Maximum expectation (EM) algorithmIn statistical computation, the maximal expectation (em,expectation–maximization) algorithm is the algorithm for finding the maximum likelihood estimation of parameters in the probability (probabilistic) model, in which the p

classification with the same attributes and which class the new data belongs to.　　The weaknesses of the EM algorithm:First, the EM algorithm runs fast in early iterations, but the later iterations are slower.Second, the EM algorithm can not always find the optimal parameters, it is easy to fall into the local optimization rather than finding the global optimal solution.The implementation of the EM algorithm can be found in the Weka, Mclustpackage has the R language to the algorithm implementati

supports running 40+ programming languages and can be used to write beautiful interactive documents. Using Jupyter notebook to write Python code, you can display the results of the operation in a good interactive.Official website: https://jupyter.orgAnacondaAnaconda Python is a collection of Python science and technology packages, similar in functionality to Python (x, y). It's a new show that has been updated many times. Package management using Conda,gui based on pyside, all packages are basi

cryptography and cybersecurity, the Internet's status may not be so high today. Now the network is insecure, but when it comes to money-related problems, we need to ensure that there is enough security, if you feel that the network is not safe, will not be silly to enter their own Yinhangka information on the Web page.RSA algorithm, one of the most forked algorithms in the field of cryptography, is presented by the three founders of RSA, and lays the

inheritance, the author has an image of the picture motioned, as below,The Pegasus (the Winged god horse, the place where its feet tread on the spring, the poet drink is inspired) is a classic multi-inheritance, inheriting the horse's body, as well as the Eagle's wings. 4. The author concludes, then, that why multiple inheritance is not supported is a design-based consideration for Java creators, mainly two points: language to be easy to use, and to discard some features that are rarely used an

purpose of the GPL license is to prevent the binary package from becoming the only source of software distribution.BSD licenses are much less restrictive and even allow binary packages to be the only source of distribution. This is the core difference, as you can understand: The GPL license gives you the right to have any method you want to use the software, but you must make sure that you provide the source code to the next person who uses it (including your changes to it section). The BSD lic

. This creates the unfairness of information. Many of the quality of content, may be on the screen for a short time, but can not get enough exposure opportunities, can not trigger the reader's interest. However, the information from top to bottom of the accumulation of traditional Web page layout, virtually to the information marked "level." In fact, to curb the unfairness of this information, many companies have racked their brains. Take Google's search results for example, in order to calcul

I. The history and opportunities of Python 1, Past lifePython is an object-oriented, literal translation computer programming language, invented by Dutch Guido van Rossum in 1989 and released in 1991 by the first public release. It is often nicknamed the Glue language, which makes it easy to easily connect a variety of modules (especially C + +) made in other languages.Modern computer programming languages or technical architectures are mostly from abroad, such as java,c,c# and Python. When you

Moore's law was proposed by Gordon Moore, one of Intel's founders, Gordon Moore. The content is: when the price is unchanged, the number of transistors that can be accommodated on the integrated circuit will increase by one times every 18 months, and the performance will be increased by one times. In other words, every dollar will be able to buy the performance of the computer, each 18 months over twice. This law reveals the speed with which informati

instruction and a changed virus body. The panda's burning incense virus caused serious consequences. In order to avoid the virus to our computer harm, so the small series today for everyone to bring the mainstream free anti-virus software antivirus horizontal assessment, the test software includes: 360 antivirus, rising, Jinshan poison PA, small red umbrella, MSE, free AVAST. History Review of Antivirus Software The oldest anti-virus software in history is said to be McAfee, alm

and text boxes and other controls, and further improve the system's development capabilities. Informix Informix was established in 1980 to provide professional relational database products for open operating systems such as UNIX. The company's name, Informix, is a combination of information and UNIX. Informix's first relational database product that really supports the SQL language is Informix SE (standardengine). Informixse was the main database product in the computer UNIX environment at th

The model-View-Controller (MODEL-VIEW-CONTROLLER,MVC) system highlights the advantages of Servlets and JSP, while minimizing their shortcomings. In the implementation, a user request is sent to a controller servlet that determines the nature of the request and transmits it to the appropriate processor according to the requested type. Each processor is associated with a particular model, which encapsulates a business logic to perform a special set of functions. After processing, the result is sen

improvement. You may wonder, what does such a philosophy have to do with Scala? Inheritance is one of the things we want to discuss. Consider the fact that the creation of the Java language was almost 20 years ago, when it was the "object-oriented" heyday. It was designed to mimic the prevailing language of C + +, trying to lure developers using the language into the Java platform. There is no doubt that such decisions were wise and necessary at the time, but, in retrospect, some of them were

Koa is a Web development framework similar to Express, and the founders are TJ. The main feature of Koa is that the generator function of ES6 is used to redesign the architecture. The KOA principle and internal structure are much like Express, but the syntax and internal structure are upgraded. Creating KOA Applications Creating a KOA is very simple: var koa = require (' KOA '); var app = Koa (); App.listen (3000);Or you can purple: var koa = re

power, and finally achieve 15-20% per second frame rate elevation. 　　5. GPU Boost 3.0+ new SLI Bridge For overclocking players, Nvidia GTX 1080 is more fun to play. First, GPU Boost 3.0 can be more intelligent for safe overclocking and can work better with overclocking software. In addition, the new SLI bridge form, can achieve 4k/144fps screen effect, for high-end players more meaningful. 　　6. Ansel makes you a game photographer. While not the exclusive feature of N

install Apt-get Update apt-get install Nginx Installation Complete Nginx-v Nginx version:nginx/1.8.0 MARIADB Database Installation MARIADB is an Open-source database and 100% is compatible with MySQL, with the goal of replacing the MySQL database. MARIADB's background: In 2008, MySQL was acquired by Sun Microsystems, which was later acquired by Oracle in 2010. Sun's acquisition was initially hailed by the MySQL community for meeting the needs of the project, but