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

r"
"
gm

Test String

Substitution

Processing...

Code Generator

Generated Code

re = /^(LTE|RS[A-Z]+)\s*([^:]+):\s+(.*?)(?=\s*$)/m str = 'AT!GSTATUS? !GSTATUS: Current Time: 54902 Mode: ONLINE System mode: LTE PS state: Attached EMM state: Registered Normal Service RRC state: RRC Connected IMS reg state: No Srv PCC: LTE band: B28 LTE bw: 10 MHz LTE Rx chan: 9260 LTE Tx chan: 27260 RSSI (dBm): -48.0 RSRP (dBm): -74.5 RSRQ (dB): -12.2 RSSNR (dB): 12 Tx Power (dBm): LTE Cell ID: 23198257 Physical Cell ID: 307 TAC: 57506 SCC1: LTE band: B1 LTE bw: 15 MHz LTE Rx chan: 275 RSSI (dBm): -59.5 RSRP (dBm): -87.5 RSRQ (dB): -9.2 Physical Cell ID: 412 OK' subst = '' result = str.gsub(re, subst) # Print the result of the substitution puts result

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