Regular Expressions 101

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Function

  • Match
  • Substitution
  • List
  • Unit Tests (22)

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An explanation of your regex will be automatically generated as you type.
  • 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

/
/
g

Unit Tests

Match French metropolitan number
Match French metropolitan number international format
Match French metropolitan number international format
Match French metropolitan number international format 2nd alternative
Match French metropolitan number international format 3rd alternative
Match French metropolitan number international format 4th alternative
Match French metropolitan number 2nd alternative
Match French metropolitan number 3rd alternative
Match french metropolitan number 4th alternative
Doesn't match French number
Doesn't match French number international format
Doesn't match French number international format 1st alternative
Match DOM/TOM national number
Match DOM/TOM national number 2nd alternative
Match DOM/TOM national number 3rd alternative
Match DOM/TOM national number 4th alternative
Match DOM/TOM international number 2nd alternative
Match DOM/TOM international number 3rd alternative
Match DOM/TOM international number 4th alternative
Doesn't Match DOM/TOM international number
Doesn't Match DOM/TOM international number
doesn't match DOM/TOM number international format

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