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

/
/
gm

Test String

Code Generator

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r#"(?m)("text":\s*\{\s*"ja_JP":\s*")([^"]*)""#).unwrap(); let string = "\"textList\": [ { \"id\": 4, \"name\": \"modeselect\", \"folder\": true, \"children\": [ { \"id\": 13, \"name\": \"Motion\", \"fontId\": 6, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Motion\" }, \"folder\": false }, { \"id\": 12, \"name\": \"Story\", \"fontId\": 7, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Story\" }, \"folder\": false }, { \"id\": 11, \"name\": \"Main_Character\", \"fontId\": 6, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Main Character\" }, \"folder\": false }, { \"id\": 5, \"name\": \"Mode_select\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Mode Select\" }, \"folder\": false }, { \"id\": 24, \"name\": \"Story_Mode\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Story Mode\" }, \"folder\": false }, { \"id\": 25, \"name\": \"Battle_Mode\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Battle Mode\" }, \"folder\": false }, { \"id\": 8297, \"name\": \"Dictionary\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Dictionary\" }, \"folder\": false }, { \"id\": 46, \"name\": \"Z_desition\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Z key:OK\\nC key:Back\" }, \"folder\": false }, { \"id\": 47, \"name\": \"back_to_the_title\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Back to the title?\" }, \"folder\": false }, { \"id\": 51, \"name\": \"select_mode\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Select Mode\" }, \"folder\": false }, { \"id\": 8298, \"name\": \"Go_to_the_Story_Mode\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Go to the Story Mode?\" }, \"folder\": false }, { \"id\": 8299, \"name\": \"Go_to_the_Battle_Mode\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Go to the Battle Mode?\" }, \"folder\": false }, { \"id\": 8300, \"name\": \"Go_to_the_Dictionary\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Go to the Dictionary?\" }, \"folder\": false }, { \"id\": 48, \"name\": \"ok\", \"fontId\": 8, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"OK\" }, \"folder\": false }, { \"id\": 49, \"name\": \"cancel\", \"fontId\": 8, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Cancel\" }, \"folder\": false }, { \"id\": 7, \"name\": \"Story_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"自由奔放で傲慢な魔族\\nであるアストリア。\\nアストリアは最近\\n地上に住まう種族の\\n殲滅に勤しんでいた。\\n次第に恐怖と畏れから\\n地上に住まう者達に名が\\n知れ渡り始めていた。\\nある日、アストリアの\\n元に面倒事が\\n持ち込まれる・・・\" }, \"folder\": false }, { \"id\": 6, \"name\": \"character_name\", \"folder\": true, \"children\": [ { \"id\": 8, \"name\": \"Astoria\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Astoria\" }, \"folder\": false }, { \"id\": 19, \"name\": \"Test2_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Test2\" }, \"folder\": false }, { \"id\": 20, \"name\": \"Test3_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Test3\" }, \"folder\": false }, { \"id\": 21, \"name\": \"Test4_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Test4\" }, \"folder\": false }, { \"id\": 22, \"name\": \"Test5_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Test5\" }, \"folder\": false }, { \"id\": 23, \"name\": \"Test6_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Test6\" }, \"folder\": false } ] }, { \"id\": 9, \"name\": \"story_name\", \"folder\": true, \"children\": [ { \"id\": 10, \"name\": \"Story1_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"1. 魔族娘の自由旅\" }, \"folder\": false }, { \"id\": 14, \"name\": \"Story2_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"2. \" }, \"folder\": false }, { \"id\": 15, \"name\": \"Story3_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"3. \" }, \"folder\": false }, { \"id\": 16, \"name\": \"Story4_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"4. \" }, \"folder\": false }, { \"id\": 17, \"name\": \"Story5_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"5. \" }, \"folder\": false }, { \"id\": 18, \"name\": \"Story6_name\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"6. \" }, \"folder\": false } ] } ] }, { \"id\": 26, \"name\": \"stageselect\", \"folder\": true, \"children\": [ { \"id\": 31, \"name\": \"Stage_select\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Stage Select\" }, \"folder\": false }, { \"id\": 32, \"name\": \"GameStart\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Game Start\" }, \"folder\": false }, { \"id\": 33, \"name\": \"Enemy_Character\", \"fontId\": 6, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Enemy Character\" }, \"folder\": false }, { \"id\": 50, \"name\": \"back_to_the_modeselect\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"Back to the Mode Select?\" }, \"folder\": false }, { \"id\": 27, \"name\": \"character_name_stage\", \"folder\": true, \"children\": [ { \"id\": 34, \"name\": \"Leonor\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Leonor\" }, \"folder\": false }, { \"id\": 35, \"name\": \"Riz\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Riz\" }, \"folder\": false }, { \"id\": 36, \"name\": \"Mary\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Mary\" }, \"folder\": false }, { \"id\": 37, \"name\": \"Koyo\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Koyo\" }, \"folder\": false }, { \"id\": 38, \"name\": \"Beryl\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Beryl\" }, \"folder\": false }, { \"id\": 39, \"name\": \"Amelia\", \"fontId\": 5, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \" Amelia\" }, \"folder\": false } ] }, { \"id\": 28, \"name\": \"stage_outline\", \"folder\": true, \"children\": [ { \"id\": 979, \"name\": \"stage1_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"アストリアは日課である\\n種族の殲滅を終わらせて\\n城で休息を取っていた。\\nそんな時、何者かが城に\\n侵入した事を察知する。\\n急ぎ様子を見に行くと\\nそこには興味深そうに\\n城を見渡す堕天使の\\nレオノールが居た・・・\" }, \"folder\": false }, { \"id\": 980, \"name\": \"stage2_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"レオノールから\\n聞き出した情報を頼りに\\n妖狐を探していた。\\nその最中、魔族のリズが\\n道の真ん中で風景画を\\n描いているのを見かける\\n興味本位で声を掛け\\n描いている絵を見せて\\nもらったのだが・・・\" }, \"folder\": false }, { \"id\": 981, \"name\": \"stage3_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"ジメジメと湿った空気が\\n充満している薄暗い\\n森の中を進んでいると\\n奇妙な帽子を被った\\n魔女のメアリーが\\nアストリアの前に\\n立ち塞がる。\\n妖狐の差し金で\\nアストリアの邪魔を\\nしようとするが・・・\" }, \"folder\": false }, { \"id\": 982, \"name\": \"stage4_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"森を抜けた先に\\n古びた神社を見つけた\\nアストリア。\\n中から九つの白い尾を\\n持った妖狐の狐耀が\\n現れる。\\nアストリアと狐耀は\\n自身の主張を通すべく\\n力尽くで相手を屈服\\nさせようとする・・・\" }, \"folder\": false }, { \"id\": 983, \"name\": \"stage5_outline\", \"fontId\": 9, \"letterSpacing\": 0, \"lineSpacing\": 0, \"text\": { \"ja_JP\": \"面倒事を終わらせて\\n気が晴れたアストリアに\\n竜人種のベリルが声を\\n掛けてくる。\\nアストリアが狐耀を\\n倒したことに対して\\nベリルは感謝を示す。\\nどうでも良い\\nアストリアは休むべく\\n帰ろうとするが・・・\" }, \"folder\": false"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/