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

// 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)"subscription":."id":.*?,"code":null,"#).unwrap(); let string = "{\"event\":{\"type\":\"bill_paid\",\"created_at\":\"2020-11-04T10:41:07.217-03:00\",\"data\":{\"bill\":{\"id\":90379582,\"code\":null,\"amount\":\"149.9\",\"installments\":1,\"status\":\"paid\",\"seen_at\":null,\"billing_at\":null,\"due_at\":\"2020-11-04T23:59:59.000-03:00\",\"url\":\"https://app.vindi.com.br/customer/bills/90379582?token=539caa15-8047-4cda-97eb-705eae360eb5\",\"created_at\":\"2020-11-03T09:07:29.000-03:00\",\"updated_at\":\"2020-11-04T10:40:54.000-03:00\",\"bill_items\":[{\"id\":108933087,\"amount\":\"149.9\",\"quantity\":1,\"pricing_range_id\":null,\"description\":null,\"pricing_schema\":{\"id\":14598836,\"short_format\":\"R$ 149,90\",\"price\":\"149.9\",\"minimum_price\":null,\"schema_type\":\"flat\",\"pricing_ranges\":[],\"created_at\":\"2020-09-15T09:44:46.000-03:00\"},\"product\":{\"id\":441371,\"name\":\"Assinatura Anual FD\",\"code\":null},\"product_item\":{\"id\":17944794,\"product\":{\"id\":441371,\"name\":\"Assinatura Anual FD\",\"code\":null}},\"discount\":null}],\"charges\":[{\"id\":88993071,\"amount\":\"149.9\",\"status\":\"paid\",\"due_at\":\"2020-11-04T23:59:59.000-03:00\",\"paid_at\":\"2020-11-03T00:00:00.000-03:00\",\"installments\":1,\"attempt_count\":1,\"next_attempt\":null,\"print_url\":\"https://app.vindi.com.br/customer/charges/88993071?b=90379582\\u0026m=36495\\u0026t=539caa15-8047-4cda-97eb-705eae360eb5\",\"created_at\":\"2020-11-03T09:07:29.000-03:00\",\"updated_at\":\"2020-11-04T10:40:54.000-03:00\",\"last_transaction\":{\"id\":153906169,\"transaction_type\":\"charge\",\"status\":\"success\",\"amount\":\"149.9\",\"installments\":1,\"gateway_message\":\"Boleto emitido\",\"gateway_response_code\":\"0\",\"gateway_authorization\":\"6631\",\"gateway_transaction_id\":\"11fc7cfb-8daf-4812-8fbf-8c621978d68a\",\"gateway_response_fields\":{\"credit_at\":\"2020-11-04T00:00:00.000-03:00\",\"due_date\":\"2020-11-04\"},\"fraud_detector_score\":null,\"fraud_detector_status\":null,\"fraud_detector_id\":null,\"created_at\":\"2020-11-03T09:07:29.000-03:00\",\"gateway\":{\"id\":33407,\"connector\":\"itau\"},\"payment_profile\":null},\"payment_method\":{\"id\":36495,\"public_name\":\"Boleto bancário online\",\"name\":\"Boleto WebService Itaú\",\"code\":\"online_bank_slip\",\"type\":\"PaymentMethod::OnlineBankSlip\"}}],\"customer\":{\"id\":17091194,\"name\":\"Marcio Holanda\",\"email\":\"maholfer@icloud.com\",\"code\":null},\"period\":{\"id\":48284238,\"billing_at\":\"2020-11-03T00:00:00.000-03:00\",\"cycle\":1,\"start_at\":\"2020-11-03T00:00:00.000-03:00\",\"end_at\":\"2021-11-02T23:59:59.000-03:00\",\"duration\":31535999},\"subscription\":{\"id\":13081195,\"code\":null,\"plan\":{\"id\":102129,\"name\":\"Assinatura Anual FD - RECORRÊNCIA\",\"code\":null},\"customer\":{\"id\":17091194,\"name\":\"Marcio Holanda\",\"email\":\"maholfer@icloud.com\",\"code\":null}},\"metadata\":{},\"payment_profile\":null,\"payment_condition\":null}}}}"; // 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/