just artifacts promo code

I made a promo code function, the member in the purchase of a certain item, how to give this coupon code to the member I got a promo code generation function in the mall backstage, how do I go to specify this coupon code when addi

is 7 bits :As can be seen, the string length of 7 bits, the generation of Covin ciphertext, are not duplicated , the basic can meet most of the situation, more I did not test, we are interested to test the number of bits generated when the duplication occurs. The advantage of this approach is that the longer the original string length, the resulting volume of ciphertext that will not be duplicated will be larger, and you can adjust it as needed.However, the only disadvantage of this way is that

　 JS methodfunction Countdown (time,id) { var day_elem=$ (ID). Find ('. Day '); var hour_elem=$ (ID). Find ('. hour '); var minute_elem=$ (ID). Find ('. minute '); var second_elem=$ (ID). Find ('. Second '); var end_time = new Date (time). GetTime (); var Sys_second = (end_time-new Date (). GetTime ())/1000; var timer = setinterval (function () { if (sys_second>1) { Sys_second-=1; var Day=math.floor ((sys_second/3600)/24); var Hour=math.floor ((sys_sec

Digitalocean is my favorite VPS service provider and currently has 10 or so Digitalocean VPS servers on hand. After more than three years of Digitalocean, I found Digitalocean a little bit of a trick. For example, if your account is not logged in after a long period of operation, Digitalocean will think you want to leave, as a retention, Digitalocean will send e-mail to tempt you to stay, mail usually has a coupon code, let you use for free.Digitaloce

per month;Enable DDoS Protection: Enables DDoS protection, which is not required by individual users;Startup script: Automatic scripting for large-scale deployment of the server, using the same installation script, the individual users do not need.SSH keys: Use ssh keys to login to the Management Server, replace the traditional root password convenient, the server is more secure, if you pay great attention to server security, recommended to open, need a certain technical foundation.Server Label

A lot of friends have encountered such a problem, that is: through the invitation of other people link, when they entered the student discount code on GitHub, but the prompt is not available. The reason is that the Digitalocean website limits the number of offers, which means that no matter how you get the offer, you can only offer it once, so the student code doesn't work. This time you can in the site s

What is the abnormal Verification Code of 12306? I have Python artifacts !, Python 12306 Everyone should join me in reading the train ticket with Python! First, we need splinter. Installation: Pip install splinter-I http://pypi.douban.com/simple-trusted-host pypi.douban.com Then a browser driver is needed. Of course chrome is used. : Http://chromedriver.storage.googleapis.com/index.html? Route = 2.20/ Selec

Emmet: Quick compilation of HTML/CSS code artifacts The predecessor of Emmet is the famous Zen coding. If you are engaged in Web Front-end development, you will not be unfamiliar with this plug-in. It uses the syntax similar to the CSS selector to generate code, greatly improving the speed of HTML/CSS code writing, as