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

Code Generator

Language

Generated Code

re = /import(?:[\s.*]([\w*{}\n\r\t, ]+)[\s*]from)?[\s*](?:["'](.*[\w]+)["'])?/m str = 'import { Component } from \'@angular2/core\'; import defaultMember from "module-name"; import * as name from "module-name "; import { member } from " module-name"; import { member as alias } from "module-name"; import { member1 , member2 } from "module-name"; import { member1 , member2 as alias2 , member3 as alias3 } from "module-name"; import { Component } from \'@angular2/core\'; import defaultMember from "$module-name"; import defaultMember, { member, member } from "module-name"; import defaultMember, * as name from "module-name"; import * as name from "module-name " import { member } from " module-name" import { member as alias } from "module-name" import { member1 , member2 } from "module-name" import { member1 , member2 as alias2 , member3 as alias3 } from "module-name" import { Component } from \'@angular2/core\' import defaultMember from "$module-name" import defaultMember, { member, member } from "module-name" import defaultMember, * as name from "module-name" import "module-name"; import React from "react" import { Field } from "redux-form" import "module-name"; import { PlaneBufferGeometry, OctahedronGeometry, TorusBufferGeometry } from \'../geometries/Geometries.js\'; import { PlaneBufferGeometry, OctahedronGeometry, TorusBufferGeometry } from \'../geometries/Geometries.js\' import("whatever.js"); import("whatever.js") import { Field } from "redux-form"; import MultiContentListView from "./views/ListView"; import MultiContentAddView from "./views/AddView"; import MultiContentEditView from "./views/EditView"; import { Field } from "redux-form" import MultiContentListView from "./views/ListView" import MultiContentAddView from "./views/AddView" import MultiContentEditView from "./views/EditView" <MenuItem value="^$" primaryText="Não exibir importados" /> <MenuItem value="\\\\w+" primaryText="Exibir importados" /> // *Add all needed dependency to this module // *app requires those import modules to function */ /** * *Add all needed dependency to this module *app requires those import modules to function * **/ let modules = [];' # Print the match result str.scan(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