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

/
/

Test String

Code Generator

Language

Generated Code

re = /flavor=\"[^\"]+\(([^\)]+)/ str = '<182>1 2016-08-30T13:11:17.530157+02:00 cloudcapprorh01.boaweng.gsnetcloud.corp capacity.instances - - [timeQuality tzKnown="1" isSynced="1" syncAccuracy="946892"] diskconfig="MANUAL" availability_zone="BOAW-1" host="srvboaw01cnodep38.boaw-infra.gsnetcloud.corp" hypervisor_hostname="srvboaw01cnodep38.boaw-infra.gsnetcloud.corp" instance_name="inst-00001ff5" power_state="1" task_state="None" vm_state="active" launched_at="2015-07-23T07:18:03.000000" terminated_at="None" accessipv4="" accessipv6="" addresses="PRB_PRODSERV_LAB (Template 0) \\ Subnet 0=10.200.0.16" config_drive="" created="2015-07-23T07:17:59Z" flavor="sabor554??(adf) (1003)" hostid="76651d2e4c981ab8084dad155e52129580ed9fd4baf5fa628cd8bae8" id="61626999-026e-4d06-9eaa-835c0262b939" image="RHEL 7.0 (3fa495a8-fbb6-45c0-9c44-874b9016d4a3)" key_name="jdelarco" name="gitlab" volumes_attached="[]" progress="0" project_id="6e58b12be4bb4972bfb42812ee806065" properties="" security_groups="[{u\'name\': u\'default\'}]" status="ACTIVE" updated="2015-11-16T17:06:38Z" user_id="x100183" region=BOAW' # Print the match result str.match(re) do |match| puts match.to_s end

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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html