Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
gm

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

package main import ( "regexp" "fmt" ) func main() { var re = regexp.MustCompile(`(?m)<bean id=.*processName"\s*value="([a-zA-Z0-9\.]*).*processVersion"\s*value="([0-9\.]*)".*<\/bean>`) var str = `<bean id="AuthenticationServicePDCAdapter" class="br.com.bradesco.web.crur.service.data.pdc.authenticationservice.AuthenticationServicePDCAdapterImpl" parent="PDCAdapterAbstract" abstract="false" singleton="true" lazy-init="true" autowire="default" dependency-check="default"> <property name="group" value="INTRANET"/> <property name="description" value="Insert description here"/> <property name="processName" value="intranet.framework.logon"/> <property name="processVersion" value="1.0.9"/> <property name="adapterPackage" value="br.com.bradesco.web.crur.service.data.pdc"/> <property name="processProduct" value="Intranet"/> <property name="isLoginRequired" value="false"/> <property name="baseClassRequestName" value="LogonRequest"/> <property name="baseClassResponseName" value="LogonResponse"/> <property name="factoryId" value="factoryAdapter"/> <property name="factoryPackage" value="br.com.bradesco.web.crur.service.data.pdc"/> <property name="factoryClassName" value="FactoryAdapter"/> <property name="isNewAwbFrameworkVersion" value="true"/> <property name="pdcConnector" ref="${pdc.connector}"/> </bean> ` var substitution = "$1-$2" fmt.Println(re.ReplaceAllString(str, substitution)) }

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/