String to check: As it turns out, our potential shipmates are extremely superstitious. As such, we do not want anyone to enter certain words in their comments. Requirements:  1. Let's start checking for bad words within a sentence. We can begin with …

维基百科:http://en.wikipedia.org/wiki/Regular_expression 正则表达式在线测试:http://tool.chinaz.com/regex/ 正则表达式,常用于文件搜索和数据校验等 iOS 提供了对正则表达式的支持:NSRegularExpression   常用的第三方正则库regexkit有全面的介绍(英文): http://regexkit.sourceforge.net/RegexKitLite/index.html  这个需要很长时间研究和总…

Regular Expression Character Classes define a group of characters we can use in conjunction with quantifiers. var str = `cat bat mat Hat 0at ?at`; var regex = /[bc]at/g; // match 'cat bat' // the same as: var regex = /(b|c)at/g; var regex = /[^bc]at/…

Boost.Regex provides three different functions to search for regular expressions 1. regex_match #include <boost/regex.hpp> #include <string> #include <iostream> int main() { std::string s = "Boost Libraries"; boost::regex expr(…

In this lesson we'll learn shorthands for common character classes as well as their negated forms. var str = `Afewserg, %8392 ?AWE`; var regex = /[a-zA-Z0-9]/g; // the same as: var regex = /\w/g; // Find anything but not the a-zA-Z0-9 var regex = /[^…

转载: http://blog.csdn.net/weasleyqi/article/details/7912647 首先,正则表达式: String check = @"((http|ftp|https)://)(([a-zA-Z0-9\._-]+\.[a-zA-Z]{2,6})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(:[0-9]{1,4})*(/[a-zA-Z0-9\&%_\./-~-]*)?"; 关于该正则表达…

Using a character set repeated 1 or more times, make a pattern to search for strings that do not contain the characters 'a', 'e', 'i', 'o', 'u', and 'y'. /[^aeiouy]+/gi Next, surround our pattern with a word boundary on each side. /\b[^aeiouy]+\b/gi…

/^-?\d{,}\.\d+$/gm…

因为要处理从身份证读取到的有效期时间,所以用到了replaceAll这个方法,类似如下代码: String s1 = s.replaceAll(".", "-");但是idea在英文句号上边进行了警告提示,说是在方法中发现疑似正则表达式,也就是我文章题目那串英文.虽然警告,但是这个写法是可以正常用得,如下图: 我就想,既然能正常用,为什么还要警告呢,那必定是有风险存在,,,经百度发现,,确实有风险,但不是这个方法,而是split切割字符串方法,如下图示例: 使用sp…

我的一个朋友问我,怎么在c#或vb.net中,计算一个字符串中查找另一个字符串中出现的次数,他说在网上打了好多方法,我看了一下,有的是用replace的方法去实现,这种方法不是太好,占资源太大了.其实如果用正则表达式Regex类,去计算一个字符串出现的次数方法最为简单实用. using System.Text;using System.Text.RegularExpressions; string str2 = TextBox1.Text;string str1 = Label1.Text; R…