unix regular expression examples

properties. If you set the static property multiline of the constructor RegExp to true, the pattern match will be in multiline mode. In thismode, the anchor characters ^ and $ do not just retrieve the beginning and end of a string, but also match the beginning and end of a row inside the retrieved string. For example: pattern/java$/matches "Java" but does not match"Java\nis fun". If we set the Multiline property, the latter will also be matched:Regexp.multiline = true;The description and applic

character that cannot comprise a word, such as [\ W] matching $ in "$5.98", equal to [^ a-zA-Z0-9]. After talking about this, let's look at some examples of the practical application of Regular Expressions:Email address verification:Function test_email (strEmail ){Var myReg =/^ [_ a-z0-9] + @ ([_ a-z0-9] + \.) + [a-z0-9] {2, 3} $ /;If (myReg. test (strEmail) return true;Return false;}HTML code shieldingFun

Pattern matching for MySQL WHERE clauseToday in the application of this problem encountered,There is a field T1, where the value is similar to: 1,1,1,2,3,3,4,4,5,5,2,4,3,2,1,2Need to search from inside for example: the first comma before the number range is 3-5, the third comma before the number of the range of 3-5, the 10th comma before the number range is 3-5, the rest is 1-5 ...The SQL statement can be written like this: SELECT* fromTBWHERET1REGEXP ' ^[3-5],[1-5],[3-5],[1-5],[1-5],[1

Examples of assertion with zero-width Regular Expressions [based on PHP] and assertion instances with regular expressions This article describes the assertion of a regular expression with zero width. We will share this with you for your reference. The details are as follows:

What is a regular expression A regular expression (regular expression), in computer science, refers to a single string that describes or matches a series of strings that conform to a certain syntactic rule. In many text editors o

object. For example, the/Jim {}/regular expression specifies that the character m can appear 2-6 times in a row in the matching object. Therefore, the regular expression can match strings such as Jimmy or jimmmmmy.After a preliminary understanding of how to use regular expr

1, Introduction　　Regular expressions are powerful tools for working with strings , with their own unique syntax and an independent processing engine, which may not be as efficient as Str's own approach, but very powerful. Thanks to this, in the language that provides the regular expression, the syntax of the regular

This blog post will introduce some commonly used digital verification methods, including integer verification, domestic phone number verification, ID number verification, as well as IP address verification, and so on authentication methods, if you are not familiar with the basic concepts, you can first look at the blog I wrote before. The first part: numerical verification 1. Verify a string that contains only numbers, a specified length (N) For example, I want to verify that a string that co