social security number check digit

We do the site, the user experience that is very important, such as 12306 Rob tickets need to fill in the ID card, if not the space, dense to give me a very depressing feeling, and also not easy to check whether the information is filled out

ID number 15, 18 digits. ID 18-bit authentication The 18-digit ID standard is clearly stipulated in the gb11643-1999 "citizenship number", which was implemented by the National Quality and Technical Supervision Bureau on July 1, 1999. Gb11643-1999

Recent project new features, need to mobile phone number, name, ID card number and other information to verify, the best way is through regular expression to verify, on-line check some information, wrote these tools methods.1. Verify the phone

Verify that the ID number is in accordance with the rules, more practical, the wrong rate of my own test for 0, very easy to use, welcome to the great God to add.protected bool Checkidcard (string idcard) {//verify 18-bit or 17-bit XL lowercase x

Test the data structure-Part 2: queue, stack, and hash table Original article:Part 2: The Queue, Stack, and HashtableBenThis article is the second part of the "Data Structure" series. It examines the three most researched data

Author: lizaibSource: Fire Ant alliance [X. S.T]Glossary-social engineering:Simply put, it uses the vulnerabilities of people's psychological vulnerabilities, rules and regulations to attack, in order to obtain the information that attackers

Transferred from: http://www.cnblogs.com/gaochundong/p/3813252.html#!comments Data Structure Add Find Delete Getbyindex   Array (t[]) O (N) O (N) O (N) O (1)

We know that any element in an array can be accessed within an O (1) time by direct addressing via an array (directly addressing). Therefore, if the storage space allows, you can provide an array, for each possible keyword to maintain a location,

What is a regular expression? A regular expression is composed of one or more character characters and/or metacharacters. In the simplest format, a regular expression only consists of characters, such as a regular expression cat. It is read as C

A new feature of OracleDatabase10g greatly improves your ability to search and process character data. This feature is a regular expression used to describe the text mode. It has appeared in many programming languages and a large number of UNIX