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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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"
"
gm

Test String

Code Generator

Language

Generated Code

re = /((?<=\[)\w+)|(\w+(?=\=))|((?<=\=)\d+)|((?<=\=)\[\d,\d\])|((?<=\=)\[\d,\d,\d,\d])|(\"[a-zA-Z\._0-9\s]+\")|(\'[a-zA-Z\._0-9\s]+\')/m str = '//完整代码匹配测试 [sprite file="1.png" index=2 rect=[0,0,0,0] pos=[0,2]][sprite file=\'2.png\' index=2 rect=[0,0,0,0]] //这是注释 /comment abcdefg //宏名称单元测试 [bg] [bg] [ bg] //字符串参数值单元测试 ="abc" ="ABC" ="_abcABC" ="_abcABC.png" ="_abcABC special.png" //参数名单元测试 [bg index=2] [bg index=2] [bg index =2] //int参数值单元测试 [bg index=54687] [bg index=1 index2=26764] //pos_t 4位长度的int数组测试 [bg index=0 pos=[1,2,3,4]] //匹配坐标型 pos_t指长度为2的整数型数组，分别为横坐标x、纵坐标y [bg index=0 pos=[0,2] //abcdd asd [vb ] ' # 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