Regular Expressions 101

Save & Share

  • Regex Version: ver. 2
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

r"
"

Test String

Substitution

Processing...

Code Generator

Generated Code

# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression. sed -E 's/(?m)^DOCUMENTATION.*(\"{3}|'{3})\n-*\n?([\s\S]+?)^\1[\s\S]*/---\n\3/;t' <<< "#!/usr/bin/python # -*- coding: utf-8 -*- # (c) 2014, Ramon de la Fuente <ramon@delafuente.nl> # # This file is part of Ansible # # Ansible is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # Ansible is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with Ansible. If not, see <http://www.gnu.org/licenses/>. DOCUMENTATION = \"\"\" module: slack short_description: Send Slack notifications description: - The M(slack) module sends notifications to U(http://slack.com) via the Incoming WebHook integration version_added: 1.6 author: Ramon de la Fuente <ramon@delafuente.nl> options: domain: description: - Slack (sub)domain for your environment without protocol. (i.e. C(future500.slack.com)) required: true token: description: - Slack integration token required: true msg: description: - Message to send. required: true channel: description: - Channel to send the message to. If absent, the message goes to the channel selected for the I(token). required: false username: description: - This is the sender of the message. required: false default: ansible icon_url: description: - Url for the message sender's icon (default C(http://www.ansible.com/favicon.ico)) required: false icon_emoji: description: - Emoji for the message sender. See Slack documentation for options. (if I(icon_emoji) is set, I(icon_url) will not be used) required: false link_names: description: - Automatically create links for channels and usernames in I(msg). required: false default: 1 choices: - 1 - 0 parse: description: - Setting for the message parser at Slack required: false choices: - 'full' - 'none' validate_certs: description: - If C(no), SSL certificates will not be validated. This should only be used on personally controlled sites using self-signed certificates. required: false default: 'yes' choices: - 'yes' - 'no' \"\"\" EXAMPLES = \"\"\" - name: Send notification message via Slack local_action: module: slack domain: future500.slack.com token: thetokengeneratedbyslack msg: \"{{ inventory_hostname }} completed\" - name: Send notification message via Slack all options local_action: module: slack domain: future500.slack.com token: thetokengeneratedbyslack msg: \"{{ inventory_hostname }} completed\" channel: \"#ansible\" username: \"Ansible on {{ inventory_hostname }}\" icon_url: \"http://www.example.com/some-image-file.png\" link_names: 0 parse: 'none' \"\"\" SLACK_INCOMING_WEBHOOK = 'https://%s/services/hooks/incoming-webhook?token=%s' def build_payload_for_slack(module, text, channel, username, icon_url, icon_emoji, link_names, parse): payload = dict(text=text) if channel is not None: payload['channel'] = channel if (channel[0] == '#') else '#'+channel if username is not None: payload['username'] = username if icon_emoji is not None: payload['icon_emoji'] = icon_emoji else: payload['icon_url'] = icon_url if link_names is not None: payload['link_names'] = link_names if parse is not None: payload['parse'] = parse payload=\"payload=\" + module.jsonify(payload) return payload def do_notify_slack(module, domain, token, payload): slack_incoming_webhook = SLACK_INCOMING_WEBHOOK % (domain, token) response, info = fetch_url(module, slack_incoming_webhook, data=payload) if info['status'] != 200: obscured_incoming_webhook = SLACK_INCOMING_WEBHOOK % (domain, '[obscured]') module.fail_json(msg=\" failed to send %s to %s: %s\" % (payload, obscured_incoming_webhook, info['msg'])) def main(): module = AnsibleModule( argument_spec = dict( domain = dict(type='str', required=True), token = dict(type='str', required=True), msg = dict(type='str', required=True), channel = dict(type='str', default=None), username = dict(type='str', default='Ansible'), icon_url = dict(type='str', default='http://www.ansible.com/favicon.ico'), icon_emoji = dict(type='str', default=None), link_names = dict(type='int', default=1, choices=[0,1]), parse = dict(type='str', default=None, choices=['none', 'full']), validate_certs = dict(default='yes', type='bool'), ) ) domain = module.params['domain'] token = module.params['token'] text = module.params['msg'] channel = module.params['channel'] username = module.params['username'] icon_url = module.params['icon_url'] icon_emoji = module.params['icon_emoji'] link_names = module.params['link_names'] parse = module.params['parse'] payload = build_payload_for_slack(module, text, channel, username, icon_url, icon_emoji, link_names, parse) do_notify_slack(module, domain, token, payload) module.exit_json(msg=\"OK\") # import module snippets from ansible.module_utils.basic import * from ansible.module_utils.urls import * main()"

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 SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html